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NXAMP4x1 & NXAMP4x4 User Manual

1. ases sone eee tone esso eese ense eee tanen 70 E OY LO ESREEERERURTRTRIUERDMONUCLEDNERUDERUMDEUUEEOMEURERRUMDEUSLREDMELUDENIDISOUDRBOMERUEENERMBUM 71 APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND 72 WHAT IS THE PHASE RELATION BETWEEN THE AUX AND MAIN OUTPUT OF YOUR DESK 72 PAGE 5 OF 81 TABLE OF CONTENT WHY IT IS UNLIKELY THE AUX AND MAIN HAVE THE SAME PHASE ccccccsseesesesesesesesesessseseseseseseseseseseseseseseseseseseseseseseeeeees 72 CONSEQUENCES OF BADLY ALIGNED SYSTEMS ccccecesssssececececsesssuececececsessauececececsensaaesecececsesessseeeeseseseaaeeeesesesenssaeeeeeeeeeeees 72 PRECAUTIONS amp f ea 73 APPENDIX LIST OF SUPPORTED PRESETS LOAD2 51 eere tenen neenon naar e eee 75 APPENDIX B HOW IS MEASURED THE AMPLIFIER POWER esee eese se ness sese sese stata 76 GENERAL DESCRIPTION OF THE SETUP wisecisccececaskcnsescsncasecussencectvccececessessesssccstecassessedescsedecestessascsccesecessessasusncesececsessasascestecesns 76 PRECISION OF THE MEASUREMENT 77 MEASUREMENT METHOD o roule eet aute eed e veu veo oo ouis on aea uae ae aed ea ue e v VE o oui on evt aute a en veu dense en ure uae e ts 77 USABLE MAINS CORD IN EURJOQDBDE o ee oen Se aeneae a ee on enean
2. NEXO INXES104 NXAMP4x1 BS o POWER OUTPUTS TDcontroller without any expansion board fitted 6 Eje NXAMP control page in ESmonitor software ESmonitor software by Auvitran is a free PC based application running under Windows XP and Windows Vista permitting full control over an Ethersound network From this software you have access to the routing of the network and to some specific control depending on the device connected PAGE 60 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL NEXO provides in each revision of the NXAMP firmware the last version of the ESmonitor software that has been successfully tested with this firmware It is recommended to use this specific version of the ESmonitor software Please refer to the ESmonitor User Manual provided by Auvitran as a pdf file when installing the ESmonitor application on your computer Once your Ethersound network is completed you can access to the control page of the NXAMP Powered TDcontroller shown bellow Propetiee NetPatch G7 1 0Patch CDAR Control NXAMP4x1 4 Input Mode Output Info NX Version O Analog Digital NX Name Loadrev DSP rev Setup Serial number Tools Group Save Dislay Unit meters Recal
3. STRESS VCEQ gt i 1 1 mI gt 1 DISPLACEMENT 1 N gt 1 1 i i NXAMP Powered Command i 11 z 1 TDcontroller MECHA STRESS BP VCEQ gt l 1 JUN mem i i 1 i 1 DSP BLOCK DIAGRAM Command 1 12 1 DISPLACEMENT i i 1 1 Command 13 B HF ACCELERATION VCEQ 1 1 1 gt 1 1 ANI gt 1 1 14 1 GLOBAL PURPOSE VCEQ gt 1 i i Fa gt 1 1 LOUSPEAKER 1 PEAK LIMITER 1 1 15 Interchannel Protection 1 From other CH 19 i Command 1 1 1 LOUSPEAKER 1 1 PEAK LIMITER 2 1 1 1 1 LF TEMPERATURE 18 1 Command i Voice Coil Temp Voice Coil Temp f NE 9 1 Command 1 FALLBACK assisTemp gt ChassisTemp ATT REL i 1 PHYSIO 1 1 1 AMP VOLTAGE Command i CURRENT HF TEMPERATURE 17 Interchannel Protection _ To other CH i 1 AMP STATUS Command AMPLIFIER 29 1 CURRENT LIMITER Command 23 1 AMPLIFIER INTEGRATE 5 4 FP 1 CURRENT LIMITER EE ones CES ATT REL Command AMPLIFIER 55 VOLTAGE LIMITER i COmmand s eese cac Ce ES 1 AMPLIFIER SHORT CIRCUIT DETECTOR 24 The detail of each block numbered is given bellow PAGE
4. E LE 57 ETHERNET CABEES ne er E t I MI RM M ae M dde MS oto 58 BIBER OPTIC estet niteat Quite qii mte teer atr Pee trie 60 INSTALLATION INSIDE THE NXAMP ee ae FE ee PERS UL oss sikosi oriista 60 NXAMP CONTROL PAGE IN ESMONITOR SOFTWARE ee eeee ee ee ee een eate eo eese esee eese sees eese 60 1 INP T METERSCHOICE Re re e AREE 61 2 INPUT tee tete Seele eire Mera uda 62 3 DELAY UNIT e ee A EUR EIE e e I EUR deste Gea AR eden fe RU SUR oe enti 62 A SECURITY RAT TR Ate e RU 62 5 VOLUME CONTROL ihe eet teen e E TU ERR edi Pete e eee ine bee Ries 62 GAIN CONTRO xs acc etd ener dtd eee eer co E ne 62 7 OUTPUT METERS eee i etit e tie dete een eie tuer etre 62 8 MUTE BUTTON 209 s eie ut f iet ein m tius 62 9 DELAY SETTINGS 62 INPUT PATCH dete e Oe e she cakes e te etd e evi deae e Ye cheese 62 11 ARRAYEQ SETTINGS Ir er en te Re din ele OE o e ode ele aera Ro ind ee ein 63 I2 VIREUAL ERONT PANEL UBRO E e itus remate ide tie nta 63 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE eee 64 WHAT YOU NEED
5. Do not rest your weight on the device or place heavy objects on it and avoid use excessive force on the buttons switches or connectors Do not use this device for any purpose other than driving loudspeakers XLR type connectors are wired as follows IEC60268 standard pin 1 ground pin 2 hot and pin 3 cold Use only Neutrik NL4 plugs for connecting Speakon connectors NEXO SA cannot be held responsible for damage caused by improper use or modifications to the device or data that is lost or destroyed Always turn the power off when the device is not in use The performance of components with moving contacts such as switches volume controls and connectors deteriorates over time Consult qualified NEXO SA service personnel about replacing defective components If you do not intend to rack mount the NXAMP attach the included rubber feet to the bottom surface of the device IMPORTANT NOTICE FOR THE UNITED KINGDOM Connecting the Plug and Cord WARNING THIS APPARATUS MUST BE EARTHED The wire which is colored GREEN and YELLOW must be connected to the terminal in IMPORTANT The wires in this mains lead are colored in accordance with the following plug which is marked by the letter or by the safety earth symbol e or colored code GREEN or GREEN and YELLOW GREEN AND YELLOW EARTH The wire which is colored BLUE must be connected to the terminal which is marked BLUE NEUTRAL with the le
6. ot 5 ge inpute c QUODO LU C l Speakon D Speakon C 1 Speckon 1 Mains connectors This is the mains input for the NXAMP There is one mains plug on NXAMP4X1 and two mains plug on NXAMP4X4 e On NXAMP4X1 the plug is a Powercon 20A for the 100 120 Volts model ref NXAMP4X1U and a standard IEC 3 pin for the 220 Volts model ref NXAMP4X1C e On NXAMP4X4 the plugs are two Powercon 30A for the 100 120 Volts model ref NXAMPAXAU and two Powercon 20A for the 220 Volts model ref NXAMP4X4C The amplifier requires high power so that it can demand high current from the AC service Connections must be properly rated for reliable operation See specification part for details 2 Balanced audio inputs with link For each of the four analog audio inputs you will find an XLR3 female input connector and also an XLR3 male connector in parallel for sending back the input signal to another unit PAGE 12 OF 81 QUICK START 3 Expansion slot This slot is used for extra audio inputs and remote control See further in the manual for details about the available options Since July 2009 all 4 15 and NXAMP4x4s are shipped with an expansion card fitted i
7. then you must first turn this power switch to the On position No operation is possible when the power switch is on the Off position 2 Amplifier indicators These Three LEDs above the power switch indicate the status of the amplifier The two first LEDs Power and Stand by indicate the power status of the amplifier e If both are off the amplifier is powered off e If Power is lit the amplifier is in use e If Stand by is blinking the amplifier is in stand by Stand by mode consumes slightly more current than in Power off mode but allows the PAGE 9 OF 81 QUICK START amplifier to be brought back from Stand by to power on mode through remote control N B Stand by mode not yet implemented in current Beta ESmonitor remote control software it is only available through GPIO The last LED Amp Protect reflects the protection status of the amplifier If this LED is lit it signifies that the amplifier is reducing or muting one or several outputs due to malfunctions as overheating output DC short circuitry In combination with other LEDs indicators and LCD display the cause of the problem will be clearly displayed Please see further for more details Please also note that the Amp Protect LED will lit while the amplifiers power supplies are starting 3 LCD display This large and easily readable 2 x 40 characters display will allow the user to quickly setup the amplifier Please note that in stand by m
8. 1 Systm Config NXAMP4x1 261 51218 0 Select one speaker setup by turning the wheel till the setup number appears blinking on the LCD screen in this example you can toggle between the Crossover Xover and the Wide setup Then depress the B button OK Once the setup is loaded the amplifier will go back to the default screen If you don t want to change the current speaker setup simply press the A button Back If you want to recall a setup from another family you should first go to the last setup of the current family meaning that the setup number cannot increase when turning the wheel You will then see the mention All appearing in front of the Select 4 switch NXAMP4x1 201 51218 0 RSIS CD If you press the select 4 button the previous display without on screen will be displayed but this time all the setup will be available when turning the wheel N B When changing setups inside the same speaker family the settings of the unit input patch delay gain are kept If you choose another family settings will go back to the default mode PAGE 39 OF 81 MENU DESCRIPTION Input Patch By default and depending on the selected speaker setup selected some or all of the four inputs will be patched to the outputs For example 4 independent channels setups like 4 x PS15 will use each analog input patched to each output but 4 way active setups like Alpha wi
9. GPOutput7 reflects the GPInput3 with a small delay and without glitches GPOutput8 reflects the GPInput4 with a small delay and without glitches Warning If a setting is changed on the NXAMP unit through front panel or remote control the LED will not turn off and if the corresponding button is pressed again the originally saved setup will be recalled Miscellaneous options This menu will allow tweaking different small options available in the NXAMP Powered TDcontroller This menu is not yet implemented in LOAD2 51 PAGE 50 OF 81 INSTALLATION RECOMMENDATIONS Installation Recommendations Audio Chain Recommendations About Loudspeaker Management Devices The NXAMP s factory delay presets are optimised to provide the best possible crossover between the MAIN SYSTEM and SUB systems Optimum results are always obtained for strictly identical signals feeding simultaneously all the NEXO NXAMP Digital TDcontrollers Typically this signal is delivered by the stereo bus output of a parametric graphic stereo equalizer which is fed by the stereo output of the mixing console Inserting devices such as loudspeaker management controllers that modify the phase relationship between SUB s NXAMP and MAIN SYSTEM s NXAMP inputs will lead to unpredictable results and will severely damage the final result NEXO strongly recommends avoiding use of such devices N B Do not use NEXO s TDcontrollers Analog or Digital t
10. In some special circumstances cardioids setups for example it is mandatory to have same Array EQ settings on two or more channels Then changing the Array EQ on one of these channels will automatically adjust the Array EQ on the other channels Options Menu With this menu you can enter some sub menu to adjust parameters of the NXAMP does do not need to be changed during the normal use of the amplifier mainly during setup of the unit only Bellow is a picture of this menu NXAMP4x1 Det iors OK 4 The sub menu located on the top of the screen will blink here it is 1 Systm Config Depressing select of channel 4 will enter this sub menu OK is displayed on the screen align with select 4 button Turn the wheel to select another sub menu When coming PAGE 38 OF 81 MENU DESCRIPTION back to the Options menu later the last selected sub menu will be displayed first System config This menu allows changing between several speaker setups inside a same family or even through any family even if this last solution is not recommended Same family means that same cabinet are connected to same outputs of the amplifier Mainly this menu is for comparing quickly to setup Wideband and Crossover for example without restarting the amplifier To enter this menu go to the OPTION menu and display Bellow is a picture of this menu First step to change the input patch is to go to the OPTION menu see above then select the sub menu
11. PAGE 26 OF 81 GENERAL DESCRIPTION AN It is mandatory to have a galvanic isolation between these signals and any another equipment Thus either the target equipment should present isolated GPIO system or the signal should goes through small signal relays to guarantee that the NXAMP GPIO will be isolated from the other equipment The maximum current available the GPIO port is the following e Maximum 200 mA drawn from the totality of the 5 V outputs e Maximum 200 mA drawn from the totality of the GP Outputs with a maximum of 32 mA for each outputs Expansion slot block The expansion slot uses unique 80 pins connectors that will allow the user to simply fit a expansion board into the amplifier At the moment the only expansion board available is the NXES104 Ethersound board compatible with the ES 100 standard offering full remote control from a computer running ES monitor by Auvitran application and 4 channels of 24 bits 48 KHz audio AN NEXO expansion slot form factor is not compatible with the Yamaha mini YGDAI form factor Thus Yamaha mini YGDAI card cannot be fitted inside NXAMP Powered TDcontroller Since July 2009 all 4 15 and NXAMP4x4s are shipped with an expansion card fitted in the NX DFLT card This card prevents output noises when main AC power feeding NXAMPs is brutally shutdown ie power down at the end of the show before NXAMPs are switched off NX DFLT card should always be fitted in w
12. NEXO amp NXAMP4X4 Powered TDcontrollers User Manual v1 6 LOAD2_51 FCC INFORMATION U S A 1 IMPORTANT NOTICE DO NOT MODIFY THIS UNIT This product when installed as indicated in the instructions contained in this manual meets FCC requirements Modifications not expressly approved by NEXO SA may void your authority granted by the FCC to use the product 2 IMPORTANT When connecting this product to accessories and or another product use only high quality shielded cables Cable s supplied with this product MUST be used Follow all installation instructions Failure to follow instructions could void your FCC authorization to use this product in the USA 3 NOTE This product has been tested and found to comply with the requirements listed in FCC Regulations Part 15 for Class B digital devices Compliance with these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with other electronic devices This equipment generates uses radio frequencies and if not installed and used according to the instructions found in the users manual may cause interference harmful to the operation of other electronic devices This applies only to products distributed in the United States of America CAUTION DO NOT OPEN WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moi
13. n 24 Bits ADCs Amp ch3 1 gt Amp ch4 1 gt Liu epe sor ls mp chi status Digital Signal Processor Digital gt 2 x DSPs chips Amp ch2 status Digital B gt ch3 status 2 M DigitalC gt status 5 gt 2 Digital D gt Analog A gt chi Input a 5 9 2 AnalogB i Amp ch2 Input nalog input r Analog Outputs P P level control 24 Bits ADCs 24 Bits DACs level control Analog gt ch3 Input Analog D gt Amp ch4 Input 1 i 1 1 1 1 Y un un uf PELLI NY x nan 1 FE eo gt omnee nennen nenne nnne nne nennen nennen nnne nnn 4 v Central Processing Unit o 5 emm gt User Interace Block a GPIO RS232 block gt The plain lines show the audio or sense signal sense are voltage or current signal measured at the output of each amplifier The dashed lines show the digital communication signal among several block You can see the audio input on the left there are four analog inputs from input XLR named Analog A Analog B and so on and four digital inputs Digital A Digital B and so on from the expansion slot These eight signals can be patched inside the DSP to any PAGE 23 OF 81 GENERAL DESCRIPTION channel of processing amplifying see further for a block diagram of what is
14. on a sub D25 plug The RS232 port is mainly used to upgrade the firmware of the unit from a PC computer But it could also be used in the future for local communication with other equipments The PAGE 25 OF 81 GENERAL DESCRIPTION pin out is given bellow RxD TxD 4 GND View from the back of the amplifier The RxD pin is the Receive data pin from the NXAMP point of view Thus this is an input The TxD pin is the Transmit data pin from the NXAMP point of view Thus this is an output GND is the ground A crossover cable connecting RxD pin of NXAMP to TxD pin of computer and so on is needed to use this serial port Please see further the dedicated part of this document on that subject The GPIO port is a Global Purpose Input Output signals system that can be use for a wide range of application mainly interfacing the NXAMP with security systems There are the following signals available e 8x General purpose output signals from NXAMP 5 Volts signals e 5 x General purpose input signals to NXAMP 5 Volts signals e 4 x 5 Volts outputs e 8x GND ground signals The pin out of these signals is given bellow S andur 49 v 1 49 d9 d9 T d9 8 d9 9 49 3ndjno 49 49 3 3 49 49 T andjno 49 5 V Output for GPIO GND contact for GPIO View from the back of the amplifier
15. If it should appear to be malfunctioning discontinue use immediately and have it inspected by qualified NEXO SA service personnel CAUTION Water warning Do not expose the device to rain use it near water in damp wet conditions place containers on it containing liquids which might spill into any openings If any liquid such as water seeps into the device turn off the power immediately and unplug the power cord from the AC outlet Then have the device inspected by qualified NEXO SA service personnel Never insert or remove an electric plug with wet hands If you notice any abnormality If the power cord plug becomes frayed or damaged or if there is a sudden loss of sound during use of the device or if any unusual smells or smoke should appear to be caused by it immediately turn off the power switch disconnect the electric plug from the outlet and have the device inspected by qualified NEXO SA service personnel e If this device should be dropped or damaged immediately turn off the power switch disconnect the electric plug from the outlet and have the device inspected by qualified NEXO SA service personnel Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others or damage to the device or other property These precautions include but are not limited to the following Power supply Power cord Remove the electric plug from the o
16. Security anam lt weds lt ws 35 s Ao ae O EG do EJE Eo EJE QE I 0048 0 0 dB 7 5 4 5dB 0 0 GOL Or 1000 0 205 1 Input meters choice Here you can choose between analog input meters or digital inputs from Ethersound network meters Mixed mode is not accessible in this release Click on the text corresponding to the input you wish to monitor PAGE 61 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL 2 Input meters Here you can see the input meters for the four channels selected above 3 Delay Unit This control is not accessible with this release only meters is possible 4 Security This control is not accessible with this release Security settings are not yet implemented However you can use the security settings from the ESmonitor software itself allowing several users to have access to the Ethersound network with different level of security Please refer to the ESmonitor User Manual for details 5 Volume control This button can set up the volume for each channel of the NXAMP To adjust the volume with this virtual pot you can click and drag the button itself or simply use the mouse wheel while you are on the virtual pot area N B On some setups the volume settings may be linked 6 Gain control To adjust the gain on one channel click and drag the virtual fader You can also si
17. WHAT SINSIDE THE CARTON BOX i 15 SETTING UP ADVICE reser duce ove SV cov vest 16 EARTH CONNECTION MAINS SETTING MOUNTING THE NXAMP IN A RACK GROUNDING SHIELDING amp SAFETY ISSUES eee ee ee eene ennt etn sensa sten netu ns 17 USING THENXAMP WITHOUT A done E stats Re bs seseascueessesstennabsceses 18 BUSES C 18 ELECTROMAGNETIC ENVIRONMENTS 18 ANALOGUE INPUT SIGNAL CABLES 19 NXAMP POWER OUTPUTS deco ss 20 GENERAL DESCRIPTION 21 GLOBAL ARCHITECTURE 21 NXAMP4X1 GLOBAL ARCHITECTURE c scccssssesesssececesssececseccecessneeecsesaeeecseaeesessaeeecsesaeeeceeaeeeessaeeecsesaeseceeaaesesuseessesaeeeceeeeeees 21 NXAMPAX4 GEOBAL ARCHITECTURE sc crane aaaea ced ee Pes 21 POWER SUPPEY BEOGCK 4 ie ERR te 22 ANALOG INPUT BLOCK 23 CONTROL BLOCK 23 POWER AMPLIFIER BLOCKS 7 e UE GS GN SC Set e hes dd ee as 24 POWER OUTPUTS
18. output power 2 9 Power consumption Frequency response Input Impedance Max Input Level Dynamic Range THD Noise Latency time Power Supply e 4 balanced analog inputs on XLR with link using 24 bit converters e 4 digital inputs via the optional network card slot at the back Power Outputs RS232 port Allow firmware upgrade for software improvement and new cabinet setups GPIO port 5 Global Purpose Inputs and 8 Global Purpose Outputs Front Panel On Off switch Wheel buttons 40 char x 2 display Amp protect Stand by Power LED s For each ch volume 15 LEDs Mute w LED Output current LED Protect LED Peak LED 4 Speakon outputs Rear Panel 1 mains socket 2 for NXAMP4X4 RS232 GPIO Expansion slot 4 XLR w link 4 Speakon 4 NXAMP4X1 NXAMP4X4 3U 19 Rack 457 mm 18 Depth 16 5kg 4U 19 Rack 457 mm 18 Depth 24 5kg 33 Ibs net 33 Ibs net Dimensions amp Weight USER CONTROLS System Selection Allows control from all NEXO ranges System Set up Within the selected range when possible allows the cabinet to be set for passive active mode wideband crossover mode choose among crossover point cardiod supercardiod mode Protection Multiple Peak Limiters fitted for both selected cabinet and amplifier Multiple Acceleration Displacement and Temperature protections on every channel Delay Up to 66m 145 ft of delay in 10cm 4in steps
19. 28 OF 81 BLOCK DIAGRAM DESCRIPTION Patching and routing 1 Basically any combination of the four XLR analog inputs numbered A to D on the back panel can be patched to each channel of the amplifier If an expansion board is fitted the four added digital input Numbered A to D also can be mixed as well In this patch section digital gain and adjustment delay are also added to optimized signal to noise on the audio path and to ensure propagation delay equal to NX242 TDcontroller N B There is no reason why analog and digital input should be in phase so we recommend a great care when patching both analog and digital input to the same channel it should be done most of the time only as a backup solution to ensure analog feeding to the amplifier instantaneously instead of digital input for example if the digital input goes down Delay amp polarity inversion 2 Factory set up delay Note that each output may contain a small phase adjustment delay at the crossover point Also a polarity inversion may be performed These adjustments are part of the factory set ups and are necessary to time align the corresponding cabinet that is selected User set up delay The user can adjust the delay for each channel see further about the delay menu or delay setting from the ESmonitor The maximum delay allowed is 66 6 meters per channel N B This user delay will be added to the converter latency DSP buffering latency and factory set up
20. 3 RS 232 Serial port This port can be used with or without NXES104 board fitted inside the amplifier However we recommend using one of the previous Ethersound ports if an NXES104 board is fitted because NXwin4 can also upgrade the firmware of the Ethersound board itself what cannot be done through the serial port Using the NXwin4 software Use the Nxwin4_setup exe to install the software on a Windows XP based computer If you are already using ESmonitor you don t need to upgrade the Ethersound API PAGE 65 OF 81 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE NB Even if you plan to use the serial port for upgrade your computer must have an Ethernet port for the software to set up correctly Then through the start menu double click on Programs gt Nexo gt Firmware Update gt NXwin4 The Nexo loader will appear on the screen of the computer Use the Browse button to select the firmware file the extension is dld A NEXO Firmware Loader 9 Visit our Web site Step 1 Choose file to download Step 2 Choose port interface Step 3 Nxwin version 4 0 0 2 Nexo 2008 Then choose the serial port connected to the NXAMP Powered TDcontroller note only the detected and available serial port appears in the list and finally press the download button The following splash window should pop up on screen NXWin4 Power on NX while holding t
21. 81 SETTING UP ADVICE With NXAMP4X1 because of this layout it is not possible to use some rack rails with 2 holes per rack unit see picture bellow because you will loose 2 U of rack space on top and bottom of the amplifier Thus continuous rack rails or with 4 holes per rack unit should be used 77177 77 7777 27 27 2727 27 27 27 27 7 27 27 2727 27 27 7 2727 27 27 7 7 Using the without rack Fuses If you do not put the NXAMP into a rack then it is mandatory to use the four rubber pads enclosed into the amplifier carton box These auto adhesive pads should be stuck on each corner of the bottom of the amplifier Without these rubber pads some internal components can be damaged when there is a shock for example dropping the amplifier on a table AN The fuses provided in the unit will not blow during normal operation If one of the fuses blows it means that the Powered TDcontroller has malfunctioned This fuse must only be changed by NEXO certified service personnel In any case do not replace the fuse with a non certified NEXO fuse as this will invalidate the NEXO warranty CAUTION This servicing instruction is for use by qualified service personnel only To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so Electromagnetic environments The emission this word describes all typ
22. Doing so may result in noise both in the device itself and in the TV or radio next to it Connections Before connecting the device to other devices turn off the power for all devices Before turning the power on or off for all devices set all volume levels to minimum Use only speaker cables for connecting speakers to the speaker jacks Use of other types of cables may result in fire Maintenance Inspect the cooling fans and clean them periodically Dust and dirt can seriously degrade the effectiveness of the cooling fan and result in malfunction or fire Remove the power plug from the AC outlet when cleaning the device Handling caution When turning on the AC power in your audio system always turn on the device LAST to avoid speaker damage When turning the power off the device should be turned off FIRST for the same reason Do not insert your fingers or hands in any gaps or openings on the device vents Avoid inserting or dropping foreign objects paper plastic metal etc into any gaps or openings on the device vents etc If this happens turn off the power immediately and unplug the power cord from the AC outlet Then have the device inspected by qualified NEXO SA service personnel Do not use the device for a long period of time at high or uncomfortable volume level since this can cause permanent hearing loss If you experience any hearing loss or ringing in the ears consult a physician
23. Input Patching Any of the 4 analog or 8 inputs combination to be routed on each output Output Gain Global and inter channel gain 6dB in 0 5dB steps Volume control Each channel with 16 steps from inf dB to 0 dB Save Recall Set up Stores 32 user set ups Array EQ LF HF shelving filters to compensate ground stacking effects 6dB Security Mode Password protected for Read Only or Remote Only Mode Remote control Full remote control via the Ethersound protocol and ESmonitor software Certification UL SEMKO CE CCC KOREA TSS PSE Green status Compliant with ROHS and WEEE directive PAGE 69 OF 81 THERMAL DISSIPATION AND CURRENT DRAWN Thermal dissipation and current drawn Test signal Pink Noise bandwidth limited 22Hz to 22 kHz All channels driven Line Current A Watts 120V 23oy Dissipated gr hi kcal h Idle 1 6 0 9 95 326 82 8ohms ch 11 1 6 1 390 1337 337 1 8out 4ohms ch 16 7 9 2 590 2023 510 2ohms ch 21 8 12 0 620 2126 536 4 Ele Mns Biss edo 120V 2307 Pssipated ge oh kealh Idle 2 3 1 3 120 411 104 8ohms ch 26 0 14 3 800 2743 691 1 8out 4ohms ch 40 0 22 0 1300 4457 1123 2ohms ch 50 0 27 5 1700 5829 1469 1 BTU 1 055 06 J 0 252 kcal W 864 cal N B These values are for NXAMP without NXES104 or NX DFLT board fitted If card is fitted please add 5 Watts to these values
24. LP 33 LONGWELL HO5VV F 3G 1 5mm Neutrik NAC3FCA LONGWELL LP 34A LONGWELL 3G 1 5mm Neutrik NAC3FCA VOLEX M2511 VOLEX 3G 1 5mm Neutrik NAC3FCA VOLEX M2511A VOLEX HO5VV F 3G 1 5mm2 Neutrik NAC3FCA NXAMP4X4 for UK PLUG CORD CONNECTOR WELL SHIN WS 012A WELL SHIN HOSVV F 3G 1 5mm Neutrik NAC3FCA LONGWELL LP 61L LONGWELL HOSVV F 3G 1 5mm Neutrik NAC3FCA VOLEX MP5004 VOLEX 3G 1 5mm Neutrik NAC3FCA PAGE 78 OF 81 ROHS CERTIFICATE ROHS certificate USE 4i Pb Hg Cr VD e cc i Shae HER x Eg X P x O x O O O RAR RP DR EB ME AT ROME EU P A HEI EST T 11363 2006 HR LE HO x KRZR BAT HW ED HE VATERS 19 TOR BERLE SIT 11363 2006 f UBER Qt ih 3 lt OA in EEUOROHSTRT CBA This product conforms to the RoHS regulations in the EU Dieses Produkt entspricht der RoHS Richtlinie der EU Ce produit est conforme aux r glementations RoHS de l UE Este producto cumple con los requisitos de la directiva RoHS en la UE 0 HARE AT Ete A RACIO THER M RIRE ZA oe AE FR RB ER BS SERE PAGE 79 OF 81 USER NOTES Nexo S A Parc d Activit de la Dame Jeanne F 60128 PLAILLY Tel 33 3 44
25. Mute Unmute GPInput3 Channel 3 Mute Unmute GPInput4 Channel 4 Mute Unmute GPInput5 ON Stand by function GPOutput1 Channel 1 current out above thrs GPOutput2 Channel 2 current out above thrs GPOutput3 Channel 3 current out above thrs GPOutput4 Channel 4 current out above thrs GPOutput5 Channel 1 Protect Peak GPOutput6 Channel 2 Protect Peak GPOutput7 Channel 3 Protect Peak GPOutput8 Channel 4 Protect Peak PAGE 46 OF 81 MENU DESCRIPTION If GPInput1 is High Channel 1 will be muted If GPInputi is Low Channel 1 will be unmuted Front Panel mute Unmute is still working If GPInput2 is High Channel 2 will be muted If GPInput2 is Low Channel 2 will be unmuted Front Panel mute Unmute is still working If GPInput3 is High Channel 3 will be muted If GPInput3 is Low Channel 3 will be unmuted Front Panel mute Unmute is still working If GPInput4 is High Channel 4 will be muted If GPInput4 is Low Channel 4 will be unmuted Front Panel mute Unmute is still working If GPInput5 is High Amplifier will go to Stand by mode If GPinput5 is Low Amplifier will go back to running mode GPOutput1 to 4 reflects the Signal LED on the front pannel meaning current flowing on the output It will be possible to select a threshold in a next release a Pilot Tone generator will be implemented also The GPOutput5 to 8 reflects the Protect OR the Peak signal for each channel GPIO mode 2 Installer mode This mode is inten
26. NXAMP4X4U mains being 120 Volts 2 0 Volts at 60 Hz Finally we average all the measurements and this is the values which are written in the datasheet of the NXAMP Powered TDcontrollers PAGE 77 OF 81 USABLE MAINS CORD IN EUROPE Usable mains cord in Europe The SEMKO CE certification in Europe is based on the assumption that the user will use one of the following mains cord to use NXAMP4X4 or NXAMP4X1 Please choose one from the list bellow PLUG CORD CONNECTOR WELL SHIN WS 010 WELL SHIN HOSVV F 3G 1 0mm WELL SHIN WS 002 1 WELL SHIN WS 010A WELL SHIN HOSVV F 3G 1 0mm WELL SHIN WS 002 1 LONGWELL LP 33 LONGWELL HOSVV F 3G 1 0mm LONGWELL LS 60 LONGWELL LP 34A LONGWELL HOSVV F 3G 1 0mm LONGWELL LS 60 VOLEX M2511 VOLEX HOSVV F 3G 1 0mm VOLEX 1625 VOLEX M2511A VOLEX HOSVV F 3G 1 0mm VOLEX 1625 YUNG LI YP 22 YUNG LI HOSVV F 3G 1 0mm YUNG LI YC 12 YUNG LI YP 23 YUNG LI 3G 1 0mm YUNG LI YC 12 NXAMPAX1 for UK PLUG CORD CONNECTOR WELL SHIN WS 012A WELL SHIN HOSVV F 3G 1 0mm WELL SHIN WS 002 1 LONGWELL LP 61L LONGWELL 3G 1 0mm LONGWELL LS 60 VOLEX MP5004 VOLEX HOSVV F 3G 1 0mm VOLEX V1625 YUNG LI YP 60 YUNG LI HOSVV F 3G 1 0mm YUNG LI YC 12 PLUG CORD CONNECTOR WELL SHIN WS 010 WELL SHIN 3G 1 5mm Neutrik NAC3FCA WELL SHIN WS 010A WELL SHIN HO5VV F 3G 1 5mm Neutrik NAC3FCA LONGWELL
27. See RE vU Lu eue 34 Y VPXLUS IU CR 0 DOT oder D M 35 ADIUSTING DELAY En eee E Fes EN VN E E E EN VERE tend 36 ADJUSTING GAIN RE 37 ADJUSTING ARRAY 38 OPTIONS MENU stade nn 38 SYSTEM CONFIG 39 INPUT PATCEHz nee etre te ru pe ret Ee AE coe reason eti er 40 SAVE RECAE EUSER SETUPS 535 n Ss tidie ted etta as bites usd vrai adt e ere edet de 42 Muere 44 GPIO MODE io ete ie Posen De as epu ee 46 MISCELLANEOUS OPTIONS 50 INSTALLATION RECOMMENDATIONS sscossssssssssssossvasensesssassossessossvassnsoassaseossnssossvavanseassaseossnsonssvasenseassasesssessossvase 51 AUDIO CHAIN RECOMMENDATIONS ae VERO Ee SPESE Ee uS 51 ABOUT LOUDSPEAKER MANAGEMENT DEVICES s csessecesseeesseceeeessceceseeecsaeceneecaaeceeeecsaeceneecsaeceeceecaueceneecsaeceeneecaeeenees 51 OPERATING SUB S FED THROUGH AN AUX tenens entente nest tenter nne 51 OPERATION OF MULTIPLE POWERED TDCONTROLLERS eese senes erre tete erret nennen 51 SYSTEM ALIGNMENT CE Esses 51 GEOMETRICAL
28. TO UPGRADE YOUR NXAMIP ecce eee ee ee eee eese toto n ane e eese eese Osee se ee enne eese estet etn Pe esee tete eee 64 SERIAL PORT UPGRADE ce dete tet oett eet de Reed eee re ta Po NE eese P Ded erbe e Pe Do aee Re UR 64 ETHERSOUND UPGRADE dentro eien elem E e n Pedes ue MERE 65 CONNECT THE COMPUTER TO THE NXAMP scene terriens Fa Se oe erg aue So esse sense 65 1 ESTOO PORT e e IER en 65 2 ETHERSOUNDIMIN PORT cates Rath tees ee eo keh ieee eee Ehe 65 3 RS 232 SERIAL PORT ice tic dee ee 65 USING THE NX WINd SOFTWARE eoeee eue Poen test s d die 65 PUT THE NXAMP IN DOWNLOAD nensi enne 67 BEGIN THE UPGRADE USING THE CONTROLLER AFTER A FIRMWARE UPDATE eee eese 68 CHOOSING CABINET SETUP ine itenim ESERE EET dace Roe EE Ee ER ee Re e EE 68 SELECTING CABINET FAMILY 1 nuncio um eUe 68 SELECT YO R CABINET SET P te o D ee EHE Pent teas cte eee t e te eee e vede EE trt A Ee ed 68 TECHNIC ATs SPECIFICATIONS a Coa voe Vas ESE ro eb gota 69 THERMAL DISSIPATION AND CURRENT
29. With musical signal should never trigger this protection mainly implemented for protection against continuous signal like sine wave and so on Amplifier peak voltage limiter 22 This is a soft clip limiter that will reduce the output level though a VCA process to limit the clipping of the amplifier Amplifier short circuit detector 24 If a short circuit is detected on the output the amplifier will mute itself and will release the mute a few second after automatically This is shown on the front panel by a blinking of the peak LED of the concerned channel together with the Amp protect LED PAGE 33 OF 81 MENU DESCRIPTION MENU DESCRIPTION The diagram bellow shows the internal structure of the menus accessible by the user from the front panel Follow the arrow corresponding to the A or B button for each menu to enter the next one NXAMP Startup A B pressed Nothing pressed Options 1 Systm Config 2 Input Patch Choose Cabinet Setup B Default Display 5 GPIO Mode 6 Miscellaneous Default display is the display of the current setup number each setup has a unique number inside for each LOAD revision and setup name see picture bellow After two minutes of inactivity the display will go back to the default display NXAMP4x1 FLAT HO PEDTH 4 ch amplifier SELECT Q Changing Cabinet Family In order to prevent end user changing between different NEXO s
30. front panel LCD display is now a comfortable 2 x 40 characters display for easy access to the parameters for each channel PAGE 8 OF 81 QUICK START This section will allow you to quickly understand the basic functions of this product If you already know the previous NEXO digital TDcontrollers such as NX241 or NX242 you may be able to use the NXAMP Powered TDcontroller quickly as it has been designed with a similar user interface However please devote some attention to reading the user manual A better understanding of specific features of the NXAMP Powered TDcontroller will enable you to operate your system to its full potential Front panel description exea NXAMPAx1 o EEEngine E ame PhOTECT NENO lt powere by YAMAHA o o O O 0 OO O QO NB Front panel of NXAMP4X1 is shown here but front panel of NXAMP4X4 is similar except the model name and the global height of the unit 1 Power switch Put the switch in the upper position to turn the power on Put it down to power the amplifier off Please note that even in the Off position high voltage is still present in some part of the amplifier as long as it is connected to mains Even if it is in the Off position the amplifier will consume a minimal current If you plan to use remote control to turn the amplifier On or Stand by
31. m AudioLan FTP 85m 75m AX CA23653 S FTP 140 120 Giga Audio S FTP 140 120m 799090 S FTP 140 m 120m CT2672600 FTP 100 90 IP20 System leas 100 m cables 4 pole RC5 RAMCATS 100 ohms 5 70 65m RC5 SU U UTP 100 m 90m Eurocable Extraflex Cats UTP 85 Eurocable Extraflex Cats FTP 123 m 105m ZNK cT2672601 S FTP 90 m Bom PCCATSEP 97m 85m PCCATSEPUTPP UTP 88m 80 PAGE 59 OF 81 Flat smooth ruggedized Cat6 Cable no shield White Really smooth ruggedized cat5e Look like a mic Cable a little bit hard to mount on RJ45 at the begining Black Ruggedized Cat5e cable really good for exteriors SFTP One shield fold per pair Green Ruggedized 5 cable very good live cable SFTP One shield fold per pair Black Really Ruggedized Cat5e cable Does not fit in standard RJ45 male plugs 0 22m SFTP One fold per pair Black Ruggedized Cat5e cable Black Industrial Ethernet stranded cable STP stranded AWG26 AWG24 1 Very smooth Ruggedized Cat5 Without any shield so be careful with EMC problem Black Ruggedized Cat5 cable very good live cable Black Cat5E Cable Shielded Cat5E Cable Shielded Cat5E Cable No shield NXES104 EXPANSION BOARD AND REMOTE CONTROL Fiber Optic Fiber Optic is similar to twisted pair but does not conduct electricity It is used in situations where a network may suffer from environmental conditions e g lightning
32. phase alignment Unconventional crossover defined filters are applied ranging from 6dB octave to near infinite slopes according to the type of crossover desired Time alignment is also unconventionally achieved by combining crossover filter group delays with all pass and or frequency dependent delays Post protection EQ and low pass 27 28 After the Protection block using VCEQ and VCAs see bellow another set of EQ low pass filtering is applied to remove some artefacts due to protection algorithm on some speaker setups Gain section 29 In this section the digital gain is applied to the corresponding channel This digital gain is computed by the CPU and depends on the user gain the setup gain for the channel and the optimization of the gain ranging done by the CPU PAGE 30 OF 81 BLOCK DIAGRAM DESCRIPTION The NXAMP TDcontroller will limit the user gain adjustment to a group of channel in specific case such as cardioids setups for example on CD18 setup gain is linked between front and rear loudspeaker Protections Each channel has its own simulation and protection process Each audio channel contains a combination of controlled gain stages let s call them VCA s as in our analogue circuitry These VCA s are embedded into complex composite structures in order to change their basic operation into frequency selective attenuation This operation is similar to that of a voltage controlled dynamic equaliser VCEQ Each VC
33. protocol is NOT COMPATIBLE with the Spanning Tree Protocol should be disabled on manageable switches Wireless LAN A local area network that transmits over the air typically but not exclusively in an unlicensed frequency or among others infrared line of sight Wireless access points base stations are connected to an Ethernet hub or server and transmit a radio frequency that can penetrate walls and other non metal barriers Roaming users can be handed off from one access point to another like for example in a cellular phone system Wireless LANs are not suitable for EtherSound networks due to significant bandwidth limitations PAGE 57 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL Ethemet cables Cables used within the EtherSound network are straight cables The cable used to connect directly the remote control PC to the Primary Master or to any of the Remote ES100 port is a crossover cable The following paragraphs describe the main twisted pair cable types used Among them you will find descriptions of cables listed for reasons of completeness but that are not suited for EtherSound networks CAT5 5e 6 7 cables Level 5 cable supports transmission rates of up to 100Mbps 200Mbps in full duplex CAT5e even 1Gbps is the most common today Category 6 supports up to 10Gbps for CAT6 and CAT7 new standards are under development Horizontal solid cable and patch stranded cable Both UTP Unshielded Twisted Pa
34. supply is limiting the power of an amplifier more than the amplifying circuit itself On NXAMP4X1 two large power supplies are used one for channel 1 and 2 and the other for channel 3 and 4 On NXAMP4X4 four large power supplies are used one for each channel They all are full resonant type with half bridge converter The ZCS Zero crossing switches PAGE 22 OF 81 GENERAL DESCRIPTION design ensures high efficiency and low noise Moreover because the two converters work in opposite phase some noise is cancelled this is preferable for both sound quality and EMC Electro magnetic compatibility Analog Input block After linking the two XLRs for each channel the analog input block has an EMC filter and a precision input buffer that will remove the common noise on the input signal The maximum level allowed for the input signal is 28 dBU 55 Volts peak to peak The pin out of the input XLR is given bellow m gt signal Negative signa Control block The control block contains several sub block that are detailed bellow Amp chi V gt Amp ch2 V gt 24 Bits ADCs Y Amp ch3 V gt 23 2 Amp cha v chi i c c O Amp ch2 1 gt
35. temperature protection at lower SPL than a properly aligned system The sound quality will decrease The reliability will decrease as the system is driven harder to achieve the same levels In certain situations you may even need more speakers to do the same job PAGE 72 OF 81 APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND Consider the simple example of the AUX signal passing through a digital device without processing that is adding a delay of 2ms due to its conversion time The AUX is then sent to a CD12 sub while the MAIN is send to the S850 rig The first graph display the phase around the crossover point 85Hz in this case Phase Degre 180 180 90 H 90 0 0 7 90 90 180 180 50 100 200 Frequency Hz Phase response between 50 and 200 Hz for S805 Phase response between 50 and 200 Hz for CD12 Phase response between 50 and 200 Hz for CD12 2 ms delay The two overlapping phases are those of the CD12 and S805 as they should be The bellow curve is the same as the above one with a 2ms delay dB dB 0 0 10 10 20 20 20 50 100 300 Frequency Hz Sound Pressure of S805 CD12 Sound Pressure of S805 CD12 with 2 ms delay On the magnitude graph display the difference between the well aligned system and the one with the CD12 2ms delayed The difference is 2dB at 100Hz This example is displaying the consequences of a
36. the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time In some special situation active setups in same enclosure for example like PS15 active it is mandatory to have same delay settings on two or more channels Then changing the delay on one of these channels will automatically adjust the delays on the other channels Adjusting Gain The gain of each channel can be adjusted from the Gain menu Bellow is a picture of this menu NXAMP4x1 8 1 95 a e P515 515 P515 SELECT Q The gain value can be read on the top of the LCD screen for each channel unit is dB To change the delay for a given channel select the channel first by pressing the corresponding select button The channel name on screen will then be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the gain setting from 6 dB to 6 dB 1 You can select multiple channels by pressing several select buttons at the same time When a selected channel reaches the maximum value it will cease to increase by continuing to turn the wheel but other selected channels may still increase the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time In some special circumstances cardioids setups for example it is mandatory to have same gain settings on two or more channels Th
37. to GPO 1 to 4 Here is the detail GPInput1 Select preset 1 impulse input GPInput2 Select preset 2 impulse input GPInput3 Select preset 3 impulse input GPInput4 Select preset 4 impulse input GPInput5 not used GPOutput1 Select preset 1 status GPOutput2 Select preset 2 status GPOutput3 Select preset 3 status GPOutput4 Select preset 4 status GPOutput5 Select preset 1 impulse output GPOutput6 Select preset 2 impulse output GPOutput7 Select preset 3 impulse output GPOutput8 Select preset 4 impulse output When an impulse is detected on GPInputi User setup 1 is recalled Warning Any setup can be recalled regardless of the loudspeaker family When an impulse is detected on GPInput2 User setup 2 is recalled Warning Any setup can be recalled regardless of the loudspeaker family When an impulse is detected on GPInput3 User setup 3 is recalled Warning Any setup can be recalled regardless of the loudspeaker family When an impulse is detected on GPInput4 User setup 4 is recalled Warning Any setup can be recalled regardless of the loudspeaker family PAGE 49 OF 81 MENU DESCRIPTION GPOutput1 is ON when setup 1 has been recalled GPOutput2 is ON when setup 2 has been recalled GPOutput3 is ON when setup 3 has been recalled GPOutput4 is ON when setup 4 has been recalled GPOutput5 reflects the GPInput1 with a small delay and without glitches GPOutput6 reflects the GPInput2 with a small delay and without glitches
38. 99 00 70 Fax 33 3 44 99 00 30 E mail info nexo fr WWW nexo sa com PAGE 80 OF 81
39. ALIGNMENT oce 52 MEASURING AND ALIGNING PHASE IN THE OVERLAPPING REGION cccescesscesseesscestensecuaecssecanecaeecaecesesenececeeeeseenseenseeeaeenaeenaes 52 NXES104 EXPANSION BOARD AND REMOTE CONTROL csccecssssosssccscssecesssessscecssscesssecesssecssssessescesssecsssseses 54 NXES 104 PHYSICAL DESCRIPTION sens 54 T ETHERSOUNDEMIN DPORT 5 5 Rege e 54 2 ETHERSOUND M NETWORK STATUS BEDS 5 re ERG RED ep E 55 PAGE 4 OF 81 TABLE OF CONTENT 3 ETHERSOUNDIM OUT PORT ete 55 4 REMOTE ESTOO PORT ente dt d e ae fret cou deerat ette ret en top re gebe 55 VARIOUS ETHERSOUND DEVICES DESCRIPTION ee ee eere eee eee eee torno esee eee tton sese sese eese sesso esee esee eee eo sete nene 55 MONO DIRECTIONAL NON ES100 DEVICES cccssscccssssecesssscecseseesecsssaecessensecsessesecesseeceesssecsesaesecseseecsensesecsesaeseceeseeceensnseseees 56 BI DIRECTIONAL NON ES100 DEVICES o ea deae ende ded rea tn 56 ES TOOIDBVIGES note tn tnt nr ne ne Re en nn et 56 ESLOU SPRRIDEVICES deett A ts oe toa 56 ETHERNET ADDITIONAL HARDWARE 57 EEE EE eR SR a RE RA AA AS 57 SWITCHES Qo ibe 57 WIRELESS AN E E E
40. CY pene Te e e cn rene ee lese cede ede pic ces ete tee ded Pede ee ses cea rece esie da cas e dee C TR e EP ER Ed 7 SOFTWARE 5 edeiecanesdeteiidieseiianingrbenelnseer pins peperere die epe rude der eR T mee 7 WHAT S CHANGED cT 7 INTEGRATED AMPLIFIER tese nete teo Dau ee etd ed tee ek he a 7 COMPUTING RESOURCES Moet to RE Ee Ee A a RS 8 FOUR SEPARATE INPUTS f ete idet eet e orte Le aive cbe edd 8 POWER SUPPLY e i h 8 ETHERSOUND OPTIONAL BOARD scccsssssesesssseecsesaececeeeeeeesseeeecessaeeeseeeaeeeeeeeeseesaeeeceeeaeeessaeeeceesaeeeceeaeeescsueeessesaeeeceessessseeaeeenses 8 USER INTERFACE 4 15 ates Meee endete united t tr tette tme c mb eto e pia 8 PAGE 2 OF 81 TABLE OF CONTENT RAS AIS TON ie e UN e tte RSEN Pret c TIRE 9 2 AMPLIFIER INDICATORS oo EDU re e ase 9 3 ECD DISPEAY 52 0 ds festina a ih edt oit be nera due fal vicem edet ned 10 A ENCODER teer E etre ES 10 5 NAVIGATION BUTTONS A amp B cisci eee f ee e e eie 10 6 VOLUME INDICATORS oe E Re EU Vae e E te Rede ee et ede deeds eee RENE e RE en 10 MUTEIBUTIONS 5 10 8 SELECT BUTTONS itc cre DRE EO ER NRI EU D D ESO EE e TOU DERE ut o Md tems 10 9 CHANNEL INDICATORS 4 5 3 teh
41. D screen in front of the channel select button NXAMP4x1 InPatch si the above example you see that input patch of channel 3 PS15 is currently edited and that Analog input A and Digital input C are patched to this channel Save recall user setups User setups contain all the settings of the NXAMP Powered TDcontroller so you can consider that a user setup is a snapshot of the amplifier state To access the Save recall menu go to the OPTION menu and select the sub menu 3 Save Recall see above NXAMP4x1 Ce Lions On the center of the screen will be displayed the various setups with the setups name On each side you can select either Save or Recall function NXAMP4x1 To save a user setup select the memory block you want to use there are 32 different memory blocks by turning the wheel till the chosen memory block appears on the top line PAGE 42 OF 81 MENU DESCRIPTION of the LCD screen Then press the Select 1 button for Save Anytime you can exit this menu by depressing the A button for Back NXAMP4x1 USERSET ad Al ah E Enrlu Once the button Save has been pressed you will be requested to enter the name for that user setup default name is USERSET followed by the setup number Starting from the first character turn the wheel to choose a letter and then depress the select 4 for Next button to go to the ne
42. E Setting Up Advice Earth connection WARNING THIS APPLIANCE MUST BE EARTHED The green and yellow wire of the mains cord must always be connected to an installation safety earth or ground The earth is essential for personal safety as well as the correct installation of the system and is internally connected to all exposed metal surfaces Any rack framework into which this unit may be mounted is assumed to be connected to the same grounding circuit Mains setting NEXO NXAMP Powered TDcontrollers exists under two references for each model NXAMP Reference Mains Voltage Mains current NXAMP4X1U 100 to 120 Volts Max 20 Amps NXAMP4X1C 220 to 240 Volts Max 10 Amps NXAMP4X4U 100 to 120 Volts Max 2x 30 Amps NXAMP4X4C 220 to 240 Volts Max 2x 16 Amps Each model applies to various safety standards only when use with the correct mains voltage Therefore the amplifier won t start or will stop working if the mains voltage is getting out of the following min and max limits NXAMP Reference Mains Minimum Voltage Mains Maximum Voltage NXAMP4X1U or 60 Volts 150 Volts NXAMP4X4U 1 or 150 Volts 288 Volts NXAMP4X4C The maximum amplifier output voltage is proportional to the mains voltage PAGE 16 OF 81 SETTING UP ADVICE Mounting the in a rack Grounding shielding amp safety issues The NXAMP Powered TDcontroller is intended for rack mounting The o
43. ENEESRETSERESED 3 POWER SUPPLY POWER CORD ERR 2 DO NOE OREN ea cadence cs sath 2 WATER WARNING nn nt mn E 2 TE YOUNOTICE ANY ABNORMALITY 2 POWER SUPPLY POWER CORD sscssscsesssusssescesscsesessossescescesbsscvessescesscsesesvensessesscsesscvessescouscsesebsssesesccsbsscvessescenscsnsessssstbescessessesess 2 2 CONNECTIONS 2 eee en ue tao oo ven von oe oleo oe ee uev uo Sud co ua eoe eon Rs ee voa TN Sees env uo dde de ns 2 HANDLING CAUTION wscssseciscssonsasedssssdscecsesesesvostsessonsesedusssiesensesetednontieesscuseseducnsiesoncesesesuonesessonsevedusnbissosonsusduostisvenseseseduessisvesees 2 IMPORTANT NOTICE FOR THE UNITED 2 COMPLIANCE INFORMATION STATEMENT DECLARATION OF CONFORMITY PROCEDURE se 2 EUROPEAN MODELS EPF E A A A T E A E 2 TABLE OF CONTENT suvecsdbeesecsdunebassdbebbacedseedetsdudeleesstsessscdssbecst eesooss 2 NXAMP VERSUS NX242 WHAT S NEW vou 7 WHATS REMAINING THE bees eek e o eee dote teens etes set ete save eO 7 poids ucc n 2 7 LEVEL AND LATEN
44. EQ and VCA is controlled by the synthesis of several signals issued from the various detection sections That synthesis is in fact the envelope of those signals with an optimised release and attack time for each VCEQ and VCA depending on its frequency range and the cabinet selected One or several of the protections below can be used depending on the setup chosen Source signals for protection algorithms 25 Signals coming from amplifier output voltage current processor output and status from amplifier are all sources that will lead to protection system implementation Displacement control 7 8 9 The amplifier output voltage sense input signal is sent to a shaping filter producing a signal whose instantaneous amplitude is proportional to the voice coil excursion this is Global displacement block 7 This signal after rectification is compared to a preset threshold matching the maximum usable value as determined from laboratory measurements Any part of the signal exceeding the threshold is sent to the VCEQ control buffer while the VCEQ acts as an instantaneous limiter very short attack time to prevent displacement from overriding the maximum permissible value Another set of VCEQ this is first displacement block 8 is used to protect the loudspeaker from an excessive displacement in the next worst displacement frequency area this usually is 3 dB bellow the global displacement protection area In case of band pass cabinet
45. GE 64 OF 81 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE Ethersound upgrade To upgrade from the Ethersound port you will need e computer running Windows XP with NXwin4 installed e A RJ 45 Ethernet 100 base TX full duplex port Acrossover cat5 network cable Connect the computer to the NXAMP Locate the serial port or the one of the usable Ethersound port at the back of the controller and use the null modem cable or the crossover cable to connect the computer on NEXO NEXO CD NXAMP4x1 RS232 oe ale Se POWER OUTPUTS Speakon B Speakon MAINS me lt au tt NZ 1 Remote ES100 port This port can be used to upgrade the NXAMP when a NXES104 board is fitted Be sure that no non ES100 devices are connected to the other Ethersound ports of the NXAMP 2 Ethersound IN port This port can be used to upgrade the NXAMP when a NXES104 board is fitted You can either directly connect the computer to this port or reach the NXAMP through the Ethersound network If several NXAMP are connected together in an Ethersound network you can upgrade automatically one after the other
46. N output amp AUX send are not exactly in phase you are introducing a delay without knowing it into the crossover between your main system and your sub Without the proper measurement tools you will never be able to tune the system as it should be Why it is unlikely the AUX and MAIN have the same phase e Signal paths are likely to be different any filter modifying the bandwidth and EQ of the signal is also affecting the phase Example a 24dB oct high pass filter set at 15Hz is only affecting amplitude of the signal 0 6dB at 30Hz but the phase shift is 90 At 100Hz we can still measure 25 of phase shift e Should you want to restrict the bandwidth with a low pass filter you can introduce a phase difference of up to 180 completely out of phase at the cross over point e If the signal is passing though any digital equipment you are adding between 1 4ms and 2 2ms around 70 phase shift at 100Hz due to the converter delay only The additional delay due to the processing itself look ahead compressor delay can be quite important At the end of the day if you have not measured both outputs in the actual configuration you can be 90 sure that you won t get the correct phase alignment that you would have had if the NXAMP was fed by a single source Consequences of badly aligned systems Mis aligned systems have less efficiency i e for the same SPL you will be obliged to drive the system harder causing displacement amp
47. NXAMP4X1 or 4U on NXAMP4X4 height of the unit there is plenty of space for connectors at the back All the inputs offer considerable 28 dBu headroom same than on the NX242 These analog inputs leads to last generation 24 bits converters running at 48 KHz like on the NX242 ES4 Power supply The NXAMPAX1 Powered TDcontroller uses three separate switch mode power supplies SMPS whereas the NXAMP4X4 uses 5 A first small power supply is used for powering the TDcontroller digital board and to initiate the power amp The other big power supplies are used for power amplifiers NXAMPAX1 channels 1 amp 2 on one power supply and for channel 3 and 4 on the other one On NXAMP4X4 each channel has its own large power supply These large power supplies are precisely tailored to work around a precise Mains voltage so separate model of NXAMP exists for 100 120 Volts on one side these are models NXAMPAX1U and NXAMPAXAU and for 220 240 Volts on the other side these are models NXAMPAX1C and NXAMPAXAC Ethersound optional board The NXAMP is designed to accept the optional NXES104 board witch offers four digital inputs among a bidirectional 2x 64 channels Ethersound ES100 network This optional board uses the new NEXO slot which prevents the necessity to open the top panel of the amplifier for installing the board NXAMP firmware upgrade can also be performed through this Ethersound port User interface The
48. OF 81 APPENDIX B HOW IS MEASURED THE AMPLIFIER POWER measure directly the output voltage on the screen Precision of the measurement e All the measurement tools Digital scope and distortion analyzer have been recently calibrated less than one year e We ve made some measurements on some batch of NXAMP to have a clear idea of the precision of the amplifier itself from one unit to the other small differences in the manufacturing of the custom transformer of the larges power supplies are the main factor for having different power capability e The precision on the dummy loads has also been checked with a calibrated ohmmeter Due to all this tolerances we can compute a value for the power output of each channel of the amplifier in a precision of 10 9 6 Measurement method The input signal is a burst sine wave at 1 KHz for 20 ms every 500 ms We increase the input level up to reaching 1 9o THD N on the distortion analyzer We measure the signal with the scope cursor as shown in the picture bellow 500 msec Vburst 1 msec Close up The center of the emission line shall be adopted as the measurement value The last one wave of burst signal shall be measured 20 msec Signal M Cursor We 4 measurements for each output so we do 16 measurements per unit Then we average on 4 units of NXAMP4X1C or NXAMP4X4C Then we redo the same with 4 units of NXAMP4X1U or
49. PAGE 70 OF 81 DIMENSIONS 21 5 mm gt 88 9 mm 480 mm 21 5 mm NXAMP4X1 front view dimensions 480 mm gt NXAMP4X4 front view dimensions NXAMP4X1 and NXAMP4X4 top view dimensions PAGE 71 OF 81 APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND Application Note Driving the Sub from the AUX send It is quite common to use the AUX send of a mixing desk to drive the Sub section of a PA system This gives the mixing engineer more flexibility to set the level of its subbass relative to the main PA apply special effects use a different EQ on the Sub However it also rises some serious issues for the performance amp safety of the system mostly time alignment What is the phase relation between the AUX and MAIN output of your Desk At NEXO when we align systems we take great care to have an optimum phase alignment from one octave above to one octave below the crossover frequency point By doing so we ensure that both drivers are working perfectly together and providing the best efficiency possible It is then up to the user to adjust the delay on the NXAMP to match the physical path difference of the different systems It is thus possible to get a well adjusted system even without measuring instruments If you choose to drive the Sub from the AUX you feed the NXAMP with two signals coming from different sources If those two sources MAI
50. RE e REI A De to RO eee Rae cadre aee Rees 11 TOY ATR INTAKES eee ek ae eae ee e ed Piet tele sik wee CIA i a be aha a ie a ens 11 11 SCREW HOLES FOR HANDLES a 11 BACK PANEES DESCRIPTION 12 CONNECTOR etit die vt d e e aH ac E iret lop a dne 12 2 BALANGED AUDIO INPUTS WITH EINK EE men week ee E E E dU 12 3 EXPANSION SLOT eei teuer aa e Vere ttiv ve yet eevee ve een eine SEP Fe O 13 4 POWER OUTPUTS estne eret fee He RR e Pa e ie te RU et 13 5 RS 232 PORT 2 rettet et RH Pep tS e ERR E Mn EE 13 6 GPIO PORT inde EUREN E tem nce C PER Eee s teme 13 7 REAR END MOUNTING e s E e A eae ORE QUE EUR E ie nn QE Pete dete dede E a CH NR E ee Ree 13 BASIC FUNCTIONS sis misent tin ep de VY d USE V Up e EYE Neve ASEEN E EE EN E EET 13 hija 13 SELECTING CABINET FAMILY e ter Dee E ense Dept ere 14 SELECT YOUR CABINET e etii ut ast seh ea teen ean 14 USING THE AMPLIFIER WITHOUT THE TDCONTROLLER 14 DEFAULT 14 AUTO SAVE VAA EE rr etes v vd Er odo EE TH ee TT 15 ENTER THE DOWNLOAD MODE terne tn tin en TENURE EUR EE EE UR DEA I I HR OQ A IS 15
51. TEM then SUB will have to be delayed with a value close to the one given by the geometrical alignment Phase alignment can be considered as correct when phase is coincident over the entire overlapping range typically an 1 octave from 60 Hz to 120 Hz and when the overall response is always superior to SUB s and MAIN SYSTEM s individual response PAGE 53 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL NXES104 expansion board and remote control On the back panel of the NXAMP Powered TDcontroller there is a slot where the user can easily insert an expansion board to add digital inputs and remote control to the unit Since July 2009 all 4 15 and NXAMP4x4s are shipped with an expansion card fitted in the NX DFLT card This card prevents output noises when main AC power feeding NXAMPs is brutally shutdown ie power down at the end of the show before NXAMPs are switched off NX DFLT card should always be fitted in when no other expansion card is used Today the only available expansion board is the NXES104 compatible with the Ethersound network technology in its ES100 version This board offers 4 digital inputs chosen among the 2 x 64 Channels of 24 bits 48 KHz audio data of the Ethersound frame and also remote control of the unit through the PC based application ESmonitor AN WARNING Only 48 KHz Ethersound networks are supported NXES104 Physical description The NXES104 is designed to fit the NEXO s slot for
52. a e Gase aen aon Sa aene non ae das a a 78 ROHS CERTIFICATE EE a dde En dde td A REED de desde eC Ca Lc a eva ve aec Su l dns e aUa dg eura dass 79 USER NOTES 80 PAGE 6 OF 81 NXAMP VERSUS NX242 WHAT S NEW NXAMP versus NX242 What s new The NXAMP Powered TDcontroller has been designed in order to provide ascendant compatibility with its predecessor the NX242 Digital TDcontroller What s remaining the same DSP core The DSP used in the NXAMP are from the same family Same core than the one used in NX242 and on the NXTENSION board Thus algorithms such as EQ will perform exactly the same on both platforms to allow the user to mix NXAMP and NX242 with traditional amplifiers at the same time However computing ressources are higher on the NXAMP see further thus some setup will perform only with this hardware Level and latency Global delays due to analog to digital and or digital to analog as well as global gain are identical on NXAMP on one side and NX242 with 26dB gain amplifiers on the other side of course attenuators should be placed to O dB Also when used with Ethersound networks through the optional NXES104 board the NXAMP has the same gain and delay from digital input to analog output than NX242 ES4 with traditional 26db amplifier Please note however that both NX242 and NXAMP should have the same firmware revisi
53. ame for each channel If this name is between brackets it means that the channel is selected Turning the encoder will then have an effect on this channel PAGE 10 OF 81 QUICK START 9 Channel indicators For each channel you have three LEDs indicator The Sense LED will light to green when a certain level of current is detected on the output meaning that a cabinet is connected and that some signal is flowing to it The Protect LED will light to yellow if the TDcontroller is applying a VCEQ protection on that channel see further for details The Peak LED will light to red to indicate that the peak limiter is working to protect the cabinet or the amplifier 10 Air intakes The NXAMP uses forced air cooling The variable speed cooling fan draws air in from the front and exhausts it through the rear Please be sure that you do not block the air intakes or exhaust vents Please be sure not to mix inside the same rack amplifiers with opposite air flow 11 Screw holes for handles These four screw holes are for the optional handles Fix the handles to the amplifier using the flat head screws included with the handles Screw driver or key TORX X20 is needed NB Separate handle models exist for NXAMP4X1 and NXAMP4X4 PAGE 11 OF 81 QUICK START Back panels description Ol O earannan NEXO NEXO Nx DFLT O C NXAMP4x1 ale CO POWER OUTPUTS
54. as to be defined as the Preferred Primary Master through ESmonitor every other device should be set as a loop back device See ESmonitor User Manual included with this software for details Thus one of the network cables can fail without any lost on the network integrity To control the network at least one of the ES100 devices inside the network should have a Remote ES100 port see bellow 3 communication port Optionally a 39 Ethernet port can be added on the ES100 device this is the Remote ES100 port that you can find on the NXES104 From this port you can take control over the connected device but also over the whole Ethersound network To do so connect a computer running the ESmonitor software just like you were connecting to the IN port of the Primary Master device of the network Ether N B You can easily recognize the ES100 devices thanks to this logo 36 100 Sound ES100 spkr devices The ES100 spkr implementation is a light implementation of the ES100 above ES100 spkr is compatible only with mono directional Ethersound network and can only extract a maximum of four outputs PAGE 56 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL Ethemet Additional hardware Hubs A hub also known as repeater is a central connection point for computers on a star topology based network Any data it receives is broadcasted to all ports and then only the computer that is listening for the data a
55. ctually receives and processes the transmission Hubs are the unintelligent relatives of switches AN WARNING Due to their internal architecture repeater hubs MUST NOT be used in Ethersound networks Switches There are different types of switches using different protocols that interact with other protocols to provide all the necessary transmission services The outline for implementing protocols in altogether seven layers is defined in a worldwide ISO standard called OSI Open System Interconnection Layer 2 3 or 4 switches Layer 2 is the communication protocol that contains the physical address of a network device It is called the data link layer or MAC Media Access Control layer and contains the address inspected by a bridge or switch Layer 2 processing is faster than layer 3 processing because less analysis of the frame is required As the EtherSound protocol contains exclusively layer 2 information switches other than layer two must not be used WARNING Layer 3 and Layer 4 switches are not compatible with the Ethersound networks Only Layer 2 switches can be used These layer 2 switches can be either managed or unmanaged Managed switches are necessary to set up VLAN networks so that EtherSound can co exist on a larger network with other applications Some switches provide functionalities of the so called SPANNING TREE PROTOCOL for inter switch communication and network management The EtherSound
56. de here is the output routing i E Speakon A HR Speakon B 2 ch3 1 Speakon C 2 JAMP ch4 1 i 2 Speakon D 24 OF 81 GENERAL DESCRIPTION Note the symmetrical structure between channel 1 and 2 on one hand and channel 3 and 4 on the other hand When using the NXAMP Powered TDcontroller in bridge mode here is the output routing Speakon Bridge EU Speakon B a NUN Speakon C T Bridge gt Uu Speakon D Now amplifier channel 1 and 2 works together in bridge mode channel 2 is marked Bridge above This is same for channel 3 and 4 The pin out on the speakon is the same as the channel 1 and 3 in non bridge mode thanks to the programmable routing unit not drawn here Vw S AN You can see with the dashed line on the above drawing that unused pins on output speakon are shorted together but are not connected to ground Therefore be careful as very high voltage might be present on these unused pins User interface block The user interface block has already been described through the front panel description in the first part of this document Please note that all the commands and displays are available through the ESmonitor software by Auvitran through the Ethersound network except the mains switch Communication block The communication block regroups the RS232 port on a sub D9 plug and the GPIO port
57. ded to be used with permanently High or Low state signals A state is validated when the state of the pin has changed and is stable for 1 second There is an action depending on the state of each GPI Here is the detail GPInput1 Sequential start up input pin GPInput2 Analog inputs mute unmute GPInput3 Digital inputs mute unmute GPInput4 Change from Setup 1 to Setup 2 GPInput5 ON Stand by function GPOutput1 Sequential start up output pin GPOutput2 Analog inputs mute unmute output GPOutput3 Digital inputs mute unmute output GPOutput4 Change from Setup 1 to Setup 2 out GPOutput5 Channel 1 current out above thrs GPOutput6 Channel 2 current out above thrs GPOutput7 Channel 3 current out above thrs GPOutput8 Channel 4 current out above thrs When starting if GPIO is set to mode 2 the NXAMP will wait that its GPInput1 pin goes low to start the amplifier part big power supplies Once started it will put its GPOutput1 pin low also so several amplifiers can be linked together If GPInput2 is High the analog inputs will be muted If GPinput2 is Low the analog inputs will be unmuted If GPInput3 is High the digital inputs will be unmuted If GPinput3 is Low the digital inputs will be muted If GPInput4 is High Saved setup number 2 will be recalled IF GPInput 4 is Low Saved PAGE 47 OF 81 MENU DESCRIPTION setup number 1 will be recalled Warning Any setup can be recalled regardless of the loudspeaker fa
58. delay The NXAMP TDcontroller will limit the delay adjustment to a group of channel in specific case such as e Active setups where two different channels are in the same physical cabinet it is then impossible to delay one channel without the other one for example PS15 Active setup delay is linked between HF and LF e Cardioids setups will also prevent to adjust the delay on one channel only for example CD18 setup delay is linked between front and rear loudspeaker Equalisation amp Filtering Subsonic and VHF filtering 3 Low and high pass filters are used to filter out frequency components that could possibly degrade the performance of the NXAMP Powered TDcontroller and loudspeakers connected depending on the cabinet setup chosen The filters are optimised to work in conjunction with overall system response PAGE 29 OF 81 BLOCK DIAGRAM DESCRIPTION The high pass filters are also extremely important as they optimise excursion at very low frequency which is a very important safety factor Therefore do not use set ups which are not designed for the cabinet you are using Equalising wideband acoustical response 3 This wideband equaliser section achieves the correction required to obtain a flat system response as the cabinets are acoustically designed for maximum efficiency on the whole frequency range Active rather than passive attenuation allows the lowering of amplifier voltages for a given output SPL and therefore i
59. detected on GPInputi amplifier will go from ON to Stand by state or from Stand by to ON state When an impulse is detected on GPInput2 the volume of all channels is increased by one volume step see volume menu for steps values When an impulse is detected on GPInput3 all the channels are muted unmuted Front pannel mute is still working When an impulse is detected on GPInput4 the volume of all channels is decreased by one volume step see volume menu for steps values PAGE 48 OF 81 MENU DESCRIPTION is blinking when the amplifier is in stand by and ON if the amplifier is running GPOutput2 is blinking each time an increase volume command is received and is ON when volume is set to max GPOutput3 is ON when all channels are muted OFF in other situations GPOutput4 is blinking each time a decrease volume command is received and is ON when volume is set to min GPOutput5 reflects the GPInput1 with a small delay and without glitches GPOutput6 reflects the GPInput2 with a small delay and without glitches GPOutput7 reflects the GPInput3 with a small delay and without glitches GPOutput8 reflects the GPInput4 with a small delay and without glitches GPIO mode 3 CP4SW setup switcher mode This mode is intended to be used with momentary High signals like push buttons It is recommended to use the Yamaha CP4SW remote control pannel for DME Connect the button 1 to 4 to the GPI 1 to 4 and each LED
60. eh CRT AE AR s oh At hana buena eitis titanio d ise 24 USER INTERFACE BLOCK ecards duse teet e rote ee ne de et eeu edu cee ads 22 P 25 EXPANSION SLOT BLOCK ez tele tese re ie oie sauces chased dete et vere deo e Da desto EE Ry et 27 BLOCK DIAGRAM DESCRIPTION eiae e code ve aerea a ree aao eve va eaae UE es 28 PAGE 3 OF 81 TABLE OF CONTENT PATCHING AND ROUTING I ScssicessacseveSusedseteceudsesasscdeesocuecesagouecesesesweesesaed eotuscseve Suscosvas dexesecagesducseecnsSeSbestsvesueesecessssaseouss 29 DELAY amp POLARITY INVERSION 2 29 FACTORY SET UP DELAY 29 USER SETUP DELA v M 29 E QUALISATION IE BU COP C C 29 SUBSONIC AND FILTERING 3 eene nennen nenne entren etre enne nennen nene nene E nennen 29 EQUALISING WIDEBAND ACOUSTICAL RESPONSE 3 s cssccsssesseeseeeseeeseeceeeeesecesecaecaecnaeceaeenaecaeecaeeeneseaeseeeeeseeeneeeneenseenaeenaes 30 USER SETUP ARRAY PO 4 e ee aetate ete 30 EQUALISING SINGLE COMPONENT RESPONSE AND NXSTREAM PROCESSING 5 30 CROSSOVER SECTION 6 14 4 ied deiecit ee eee e Fe ace eee ite re lt etes eee deese etie eee tete 30 POST PROTECTION EQ AND LOW PASS 27 28 esses ener enne ener rene rennen rris 30 GAIN SECTION CA A t
61. en changing the gain on one of these channels will automatically adjust the gains on the other channels NB You can adjust large differences of gain between channels with the volume menu see above There is basically no difference between gain setting and volume setting for a channel this distinction is only done by analogy with traditional amplifiers The CPU will always take care of gain and volume settings and decide what the best combination is between analog or digital gain to optimize dynamic range of the system PAGE 37 OF 81 MENU DESCRIPTION Adjusting Array EQ The Array EQ of each channel can be adjusted from the Array EQ menu Bellow is a picture of this menu NXAMP4x1 The Array EQ value can be read on the top of the LCD screen for each channel unit is dB To change the Array EQ for a given channel select the channel first by pressing the corresponding select button The channel name on screen will then be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the Array EQ setting from 6 dB to 6 dB You can select multiple channels by pressing several select buttons at the same time When a selected channel reaches the maximum value it will cease to increase by continuing to turn the wheel but other selected channels may still increase the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time
62. ervo controlled for temperature This means in practice that in case of a potential risk detected protective operation would only affect the concerned driver Your driver will be protected but the overall system tonal balance could be altered if the different channels are not heating at the same time In addition triggering a temperature protection means that the loudspeaker has already lost some efficiency power compression up to 3dB in extreme cases The purpose of interchannel regulation is to cancel that effect by linking VCAs together When the protection is activated on one channel and reaches a predetermined threshold the regulation section begins to correct the balance between the different channels HF MF and LF by acting on the concerned VCA Amplifier peak current limiter 20 To prevent over current on the output of the amplifier this peak current limiter is implemented leading to a separate VCA block 30 from the one being used for loudspeaker protection block 26 This protection is implemented here mostly in case of default of the power supply and will barely be triggered during normal use because it is set up at the limit of what can deliver the power supply of the amplifier Amplifier integrate current limiter 21 This protection which is also triggering a VCA will compute the integration of the current over time to check that the current drawn by the amplifier will not go above what is acceptable for the mains
63. es of electromagnetic noise radiated by the equipment requirements which have been applied to Nexo s Powered TDcontrollers are the stringent requirements of the Commercial and light industrial environment of the product family EMC standard for emission PAGE 18 OF 81 SETTING UP ADVICE The immunity this word describes the ability to cope with electromagnetic disturbance generated by other items and natural phenomena requirements that we have considered exceed those applicable to the Commercial and light industrial environment of the product family EMC standard for immunity In order to provide a further safety margin we recommend that you do not operate the Powered TDcontrollers in the presence of electromagnetic interference exceeding half of the limits found in this standard These two EMC standards are those applicable to pro audio equipment for the implementation of the EMC directive Analogue input signal cables Analogue signals should be connected to the input ports of the NXAMP Powered TDcontroller via shielded twisted pair or Starquad cable fitted with XLR connectors on the NXAMP side We recommend the use of low transfer impedance cables with a braided shield and transfer impedance below 10 m m The NXAMP Powered TDcontroller is intended to be used with symmetrical balanced sources for instance a mixer see figure bellow You can see that the TDcontroller provides a low impedance path between pin 1 of its XLR c
64. ever The Power button is not working at the moment N B Some special characters may not be displayed correctly on the virtual LCD screen PAGE 63 OF 81 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE NXwin4 software for NXAMP firmware upgrade Please check regularly on NEXO website www nexo sa com for NXAMP Powered TDcontroller firmware upgrade These upgrades are freely downloadable and can improve e 5 setup for cabinets including new setups for new products e NXAMP firmware functions e NXAMP remote control functions AN WARNING NXAMP Powered TDcontroller is delivered with a FLAT firmware only no NEXO setup installed so it is mandatory to upgrade the firmware of the unit to the last available firmware that you will find on our website What you need to upgrade your NXAMP NXAMP can be upgraded either e By its serial port RS 232 e By its Ethersound IN or Remote ES100 port if a NXES104 board is fitted NB Upgrade through one of the above Ethersound ports when the unit is a Primary Master This provides much faster results than the other solution Serial port upgrade To upgrade from the serial port you will need e computer running Windows with NXwin4 installed A serial port or an USB to serial adapter null modem cable crossover serial port cable with 2 DB9 female plugs See cabling bellow NEXO RS232 serial port COM port Signal ground Unused PA
65. g NEXO recommends the exclusive use of multi conductor cables to connect the system the cable kit is compatible with all the cabinets and there is no possible confusion between LF MF and HF sections Cable choice consists mainly of selecting cables of the correct sectional dimension size in relation to the load resistance and the cable length Too small a cable section will increase both its serial resistance and its capacitance this reduces the electrical power delivered to the loudspeaker and can also induce response damping factor variations For a serial resistance less or equal to 4 of the load impedance damping factor 25 the maximum cable length is given by Lmax ZX S S Zin Ohm Lin meters The table below indicates these values for 3 common sizes Load Impedance Q 2 3 4 6 8 12 16 Cable section Maximum Length meters 1 5 AWG 14 3 PAGE 20 OF 81 GENERAL DESCRIPTION GENERAL DESCRIPTION Global architecture Global architecture The diagram bellow shows the global architecture of the NXAMP4X1 amplifier AC Power Supply Block 2 Channels Power Amplifier Power Switch Analog Input Block EEEngine Channel 1 O Channel 3 Channel 2 C Power Channel 4 Outputs Block User Interface Block LCD Switches Enc
66. he Mute 1 button down and wait For the DOWNLOAD WAITING message Press OK when ready To upgrade the NXAMP fitted with NXES104 board through the Ethersound network choose the Ethersound port interface and select the network card connected to the Ethersound network Select device that you want to upgrade A NEXO Firmware Loader B NENO Visit our Web site EtherSound Devices WWW nexo sa com Step 1 Choose file to download Mac address Product ES Firmware Status 1 1 w 00 0 55 03 17 6 NXAmp 0 0005 D LOAD2_46 did Browse 2 nn nr 55 n3 17 56 NXAmn m nnns Step 2 Choose port interface Serial Port EtherSound NETGEAR FAS11 CardBus Mobile Adapter Step 3 PROGRAM NxWin version 4 0 0 2 Nexo 2008 Note the firmware of the Ethersound board will be upgraded at the same time if included inside the LOAD file DLD file PAGE 66 OF 81 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE Put the NXAMP in download mode That means power the unit ON while having the mute 1 button down O P teer NX AMPA O a I powered by G YAMAHA e O 1 Hold the mute 1 button down and keep it down 2 Turn ON the NXAMP Powered TDcontroller The NXAMP screen will display the revision of the boot loader and then the following message will appear NXAMP4x1 Boot wi 25 Dow
67. hen no other expansion card is used PAGE 27 OF 81 BLOCK DIAGRAM DESCRIPTION Block diagram description The block diagram bellow shows the global signal path inside the DSPs for one channel identical for all the channels 2 3 4 5 6 26 27 28 29 ANALOG INPUT A EQ NXSTREAM gt EQ b VCEQ ANALOG INPUT B J DELAY i Ab CANALOG INPUT 1 CANALOG INPUT D 2 Command GLOBAL 7 VCEQ pl i DISPLACEMENT 30 31 gt PA gt 1 CDIGITAL INPUT gt lt AMP CHI gt Command 1 VCA gt MUTE TO AMP CHI CDIGITAL INPUT gt 1 T FIRST DiSPLACEMENT 8 CDIGITAL INPUT C VCEQ gt i CBIGTTRCTIPUT D Command i 1 PATCH FIRST DISPLACEMENT 9 1 BP VCEQ gt 1 1 10 5
68. ical alignment In the example below r being the smaller distance from MAIN SYSTEM array to listener position and r being the smaller distance from SUB to listener position the distance difference is then r r specified meters or feet gt r the delay should be set on the SUB NXAMP Powered TDcontroller s er lt the delay should be set on the MAIN SYSTEM NXAMP Powered TDcontroller s To convert the result in time delay specified in seconds apply At r4 r2 C r4 and r in meters C sound speed 343 m S The delay parameter is set in MENU Delay See above However it is a safe practice to double check geometrical alignment with a proper acoustical measurement tool Measuring and aligning phase in the overlapping region Microphone must be set on the ground at a fairly distant listening position typically further than the mixing position Phase must be measured with a wrapped display and measurement must be properly windowed on signal arriving time same window for SUB and MAIN SYSTEM When measurement is synchronized to the system microphone distance phase can be clearly displayed in the low frequency range PAGE 52 OF 81 INSTALLATION RECOMMENDATIONS If the MAIN SYSTEM phase reading appears to be superior to the SUB phase reading then MAIN SYSTEM will have to be delayed with a value close to the one given by the geometrical alignment If SUB appears to be in advance to MAIN SYS
69. ication are white except the last one corresponding to 0 dB attenuation which is Blue That allows to quickly checking that all volumes are correctly set on a NXAMP powered TDcontroller NB You can adjust small differences of gain between channels with the gain menu see further There is basically no difference between volume setting and gain setting for a channel this distinction is only done by analogy with traditional amplifiers The CPU will always take care of gain and volume settings and decide what the best combination is between analog or digital gain to optimize dynamic range of the system Adjusting Delay The delay of each channel can be adjusted from the Delay menu Bellow is a picture of this menu NXAMP4x1 15 LE 4 m Pzin 1 FS m The delay value can be read on the top of the LCD screen for each channel unit is meters To change the delay for a given channel select the channel first by pressing the PAGE 36 OF 81 MENU DESCRIPTION corresponding select button The channel name on screen will then be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the delay setting maximum delay is 66 6 meters You can select multiple channels by pressing several select buttons at the same time When a selected channel reaches the maximum value it will cease to increase by continuing to turn the wheel but other selected channels may still increase
70. ime MR ete di e ete tnde et e e tete eet bec t isnt 30 PROTECTIONS ee ondes den enter en ess 31 SOURCE SIGNALS FOR PROTECTION ALGORITHMS 25 esses ener 31 DISPLACEMENT CONTROL 7 8 9 re vee e redet eee ee te E UE arret ei Pe eges 31 MECHANICAL STRESS CONTROL 10 11 31 DISPLACEMENT CONTROL 12 A en 32 ACCELERATION CONTROL 13 S EE ook cau 32 GLOBAL PURPOSE VGEQ IA serre tnt ee AL es RE Ae ow A AA RE di e ted 32 LOUDSPEAKER PEAK LIMITERS 15 c cccsescessteecevceseceecestecduectcutudsdeedsievecescacoudesduecteesidecstcedevetacecdecotdecenediseidadieceevdtesuceecevteeduees 32 TEMPERATURE CONTROL 1 6 See I MiGs E tite 32 Iud el WNIJENUIOUE VIOLET 33 AMPLIFIER PEAK CURRENT LIMITER 20 sess eerie 33 AMPLIFIER INTEGRATE CURRENT LIMITER 21 eese eene nennen nennen enne nennen nene tenete nennen nne enne 33 AMPLIFIER PEAK VOLTAGE LIMITER 22 eee testes eterne nido iere ioco desde aeree ied dede engen 33 AMPLIFIER SHORT CIRCUIT DETECTOR 2f inneren riisi eere ER EE TEE ios 33 MENU DESCRIPTION tint 34 CHANGING CABINET FAMILY eee teet toe sb Do ec qe ERAS
71. inside the DSP All signals audio or sense use 24 bits converters The CPU can also set up the analog input and output gain for each channel thus ensuring that the dynamic range of the system is always optimized regarding volume gain patch and bridge settings Monitoring of the amplifier modules and power supplies including multiple measurement such as temperature voltages current integrate current are done both by the CPU and the DSPs Power amplifier blocks The power amplifier part is a custom design to fit the very unique concept of digital protection of an analog amplifier On the pure amplification side it utilizes custom transistor thin chip and small thermal resistance and the well known Yamaha EEEngine technology that offers the sonic quality of the conventional class AB amplifier with the efficiency of the class D You can learn more about the EEEngine technology at the following address http www yamahaproaudio com topics leading technology learn more about eeengine index html Power outputs block The power outputs block is used for current and voltage sensing at the output of the amplifier These datas will be used by the DSP for protecting both the amplifier and the NEXO loudspeaker connected This stage features also a programmable routing unit that allows using the amplifier in bridge mode on the same speakon pins than in non bridge mode When using the NXAMP Powered TDcontroller in four channels mo
72. ional non ES100 These devices features two ports ES IN and ES OUT and can be only connected to mono directional networks 64 channels of 24bits 48 KHz Do not use them in a bidirectional part of an Ethersound network or in a network where ES100 functions are used Bi directional non ES100 devices More sophisticated Ethersound devices are bi directional non ES100 These devices features two ports ES IN and ES OUT and can be connected to both mono and bi directional networks 2 x 64 channels of 24 bits 48 KHz Do not use them in a network where ES100 functions are used NB The NEXO NX242 ES4 Digital TDcontroller is a bi directional non ES100 devices ES100 devices These devices compatible with the ES100 variant of the Ethersound network are bi directional devices compatible with both mono and bi directional networks that offer new functionalities we called them the ES100 functions Here is a list of the new ES100 functions e Device to device communication With classical Ethersound implementation only the remote control computer can communicate with the various devices or the network and only audio data can be exchanged between devices With ES100 devices can send non audio data between them without passing through the remote control computer e Ring topology Instead of the classical daisy chain Ethersound network you can now connect the last OUT port of the network to the IN port of the primary master that h
73. ir and STP Shielded Twisted Pair come in stranded and solid wire varieties The stranded wire is the most common and is also very flexible for bending around corners Solid wire cable has less attenuation and can span longer distances but is less flexible than stranded wire and cannot be repeatedly bent and therefore not suitable for live applications Following are the twisted pair categories Horizontal cable also called solid cable is made of plain copper conductors and has a low characteristics shift with aging It must be used for long runs of steady cabling typically the cables inside walls and ceiling Patch cable also called stranded cable more flexible is made of stranded copper conductors and has larger losses and characteristics shifts than horizontal cable It can be used for versatile termination between wall outlet and device or between devices These cables are explicitly labeled PATCH The TIA EIA 568A wiring standard allows the use of horizontal cable up to 90m 295ft lengths with a maximum amount of 10m of patch cable for both ends added together UTP FTP ScTP STP SFTP cables UTP stands for Unshielded Twisted Pair It is a cable type with one or more pairs of twisted insulated copper conductors contained in a single sheath It is the most common type of cabling used in desktop communications applications AN WARNING For optimum performance sake and electromagnetism behavior the UTP cables shall NOT be
74. lease note that once you ve pressed B button to say Yes you will need to power Off On the unit again before changing any settings on the unit if you want the restore default to be active Auto save The current set up is automatically saved three seconds the last change of a parameter At power up the last saved settings are restored Enter the download mode Keep the mute 1 button down during boot up will enter the download mode See further for connection to the computer and download software Nxwin description o NXAMP4x1 Boot 1 25 Download wailing PROTECT SIGNAL 602 ME GS What s inside the carton box WARNING The shipping weight of the 1 U or version is nearly 21 Kg 46 Ib The shipping weight of the NXAMP4X4 U or C version is nearly 30 Kg 66 Ib Because of the large size of the carton box it is recommended to manipulate the box with two persons Open the box with care to prevent damage on the content Inside you will find e 1 X NXAMP Quick start guide 32 pages 7 languages e 4 x Rubber pad e 1 x NXAMP Powered TDcontroller with NX DFLT card fitted e 1xMains cord for NXAMP4X1 or 2 x Mains cord for NXAMP4X4 N B The provided mains cord is Chinese type for NXAMPAX1C or NXAMP4X4C 220 240 Volts version and US type for NXAMPAX1U or NXAMP4X4U 100 120 Volts version PAGE 15 OF 81 SETTING UP ADVIC
75. ll use only one analog input patched to all the outputs Most of the time the user can freely change the way inputs are patched to the outputs However in some special circumstances like cardioids setups for example it is mandatory to have same signal feeding two channels of amplifier or more In this situation changing the patch for one channel will automatically affect the other channels NXAMP4x1 ionz 4 First step to change the input patch is to go to the OPTION menu see above Then select the sub menu 2 Input Patch Once this menu is selected select the channel you want to change the input patch by using the corresponding select button Then only the selected channel will be displayed alone on the bellow line of the LCD screen You can also go back to the previous step by depressing the A button NXAMP4x1 515 1 515 JC 515 M 515 14 Now that one of the channels is selected you can see the inputs available on the top line of the screen On the back of the amplifier you can see Analog Input A Analog Input B and so on These inputs are named AA for Analog input A AB for Analog input B AC for Analog input C and AD for Analog input D PAGE 40 OF 81 MENU DESCRIPTION 1 If an optional board is fitted inside the expansion slot then four Digital inputs will be available too These digital inputs are named DA for Digital Inp
76. long periods of time 13 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Please read carefully before proceeding Please keep this manual in a safe place for future reference WARNING Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock short circuiting damages fire or other hazards These precautions include but are not limited to the following Power supply Power cord Only use the voltage specified as correct for the device The required voltage is printed on the name plate of the device Use only the included power cord Do not place the power cord near heat sources such as heaters or radiators and do not excessively bend or otherwise damage the cord place heavy objects on it or place it in a position where anyone could walk on trip over or roll anything over it Be sure to connect to an appropriate outlet with a protective grounding connection Improper grounding can result in electrical shock Do not open Do not open the device or attempt to disassemble the internal parts or modify them in any way The device contains no user serviceable parts
77. m factor that can be located on the back panel of the NXAMP Powered TDcontrollers NB This slot features an 80 pins internal connector that is not compatible with the Yamaha mini YGDAI slot 1 Ethersound IN Port This Port features and Ethercon connector Always use this type of connector to secure your Ethersound network from unwanted unplugs This type of connector also ensures a longer life to the internal RJ 45 contacts because it preserves it from external traction Use this port as an Ethersound IN port when connecting to an Ethersound network PAGE 54 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL 2 Ethersound network Status LEDs These four LEDs reflect the status of the Ethersound links The two LEDs next to the IN port shows that data is received from the IN port when the top one marked Rx blinks or are send through the IN port when the bottom one marked Tx blinks NB When used with mono directional Ethersound network if no remote control computer is connected only the Rx LED of the IN port will blink The two LEDs next to the OUT port shows that data is received from the OUT port when the top one marked Rx blinks or are send through the OUT port when the bottom one marked Tx blinks NB When used with mono directional Ethersound network if no remote control computer is connected only the Tx LED of the OUT port will blink 3 Ethers
78. me Jeanne 5 60128 PLAILLY The above statements apply ONLY to those products distributed by NEXO SA or its subsidiaries The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the PRECAUTIONS provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Unplug this apparatus during lightning storms or when unused for
79. mily If GPInput5 is High Amplifier will go to Stand by mode If GPinput5 is Low Amplifier will go back to running mode GPOutput1 has been described above GPOutput2 reflects the GPInput2 with a small delay and without glitches GPOutput3 reflects the GPInput3 with a small delay and without glitches GPOutput4 reflects the GPInput4 with a small delay and without glitches GPOutput5 to 8 reflects the Signal LED on the front pannel meaning current flowing on the output It will be possible to select a threshold in a next release a Pilot Tone generator will be implemented also GPIO mode 3 CP4SW simple remote mode This mode is intended to be used with momentary High signals like push buttons It is recommended to use the Yamaha CP4SW remote control panel for DME Connect the button 1 to 4 to the GPI 1 to 4 and each LED to GPO 1 to 4 Here is the detail GPInput1 ON Stand by function impulse input GPInput2 Increase volume impulse input GPInput3 Mute unmute or att impulse input GPInput4 Decrease volume impulse input GPInput5 Mute or attenuator mode selector GPOutput1 ON Stand by status GPOutput2 Max volume reached status GPOutput3 Global mute or attenuator status GPOutput4 Min volume reached status GPOutput5 ON Stand by out to other amp GPOutput6 Increase volume out to other amp GPOutput7 Mute unmute out to other amp GPOutput8 Decrease volume out to other amp When an impulse of at least 3 seconds is
80. mote control of the NXAMP When the local controls are LOCKED the user can navigate into the menus but cannot change settings of the unit However the MUTE buttons are still working This feature is enable through a password that the user can choose 8 letters When the remote controls are LOCKED the user can monitor the unit but cannot change settings through the network However the MUTE buttons are still working This feature is PAGE 44 OF 81 MENU DESCRIPTION enabled through the same password When this menu is entered the following display will appear 1 To change either the local remote control access press the corresponding Select 2 for local control or Select 4 for remote control button If the password has not been entered yet it will be asked now NXAMP4x1 If the wrong password is entered it will be displayed and you can then only go back to previous menu which will be still in read only If the good password is entered you then either go back and edit the previous menu press Select 4 or change the current password press Select 1 In this last situation you will need to enter the new password NXAMP4x1 Password Ok In the previous menu you can then press the Select 2 or Select 4 buttons and toggle the Local or Remote access between FREE or LOCKED If you leave this menu and come back to this security menu later on you will need t
81. mplifiers be sure to keep an adequate gap between this device and the heat generating devices or install ventilation panels to prevent high temperatures from developing inside this device Inadequate ventilation can result in overheating possibly causing damage to the device s or even fire Do not use the device in a confined poorly ventilated location If this device is to be used in a small space other than an EIA standard rack make sure that there is adequate space between the device and surrounding walls or other devices at least 10 cm at the sides 15 cm behind and 40 cm above Inadequate ventilation can result in overheating possibly causing damage to the device s or even fire Do not expose the device to excessive dust or vibrations or extreme cold or heat such as in direct sunlight near a heater or in a car during the day to prevent the possibility of panel disfiguration or damage to the internal components Do not place the device in an unstable position where it might accidentally fall over Do not block the vents This device has ventilation holes at the front rear to prevent the internal temperature from becoming too high In particular do not place the device on its side or upside down Inadequate ventilation can result in overheating possibly causing damage to the device s or even fire Do not use the device in the vicinity of a TV radio stereo equipment mobile phone or other electric devices
82. mply goes onto this control and use the mouse wheel N B On some setups the volume settings may be linked 7 Output meters For each channel there are two output meters the left one is showing the output voltage whether the right one is showing the output current 8 Mute button Click on this button to mute or unmute a channel 9 Delay settings Use the small buttons bellow the text box to increase or decrease the delay settings for each channel You can also directly enter the delay value in the text box On some setups the delay settings may be linked 10 Input patch For each channel you can see eight buttons corresponding to the eight available inputs 4 PAGE 62 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL analog and 4 digital Click on the button to patch or unpatch an input If the button is dark it means that the input is patched if not it is white N B On some setups the input patch may be linked 11 ArrayEQ settings To adjust the ArrayEQ on one channel click and drag the virtual fader You can also simply go to this control by utilizing the mouse wheel of your computer On some setups the ArrayEQ settings may be linked 12 Virtual front panel This virtual front panel is a copy of the NXAMP user interface You can see the LCD display and the front panel LEDs status You can use all the push buttons and the encoder wheel by clicking with your mouse or using its wheel How
83. n the NX DFLT card This card prevents output noises when main AC power feeding NXAMPs is brutally shutdown NX DFLT card should always be fitted in when no other expansion card is used The Presence LED on the NX DFLT card shows that the card is running properly It will lit when the amplifier is powered ON also in Stand by mode 4 Power outputs Use Neutrik NL4 cable plug into these ports for safely connecting the power amplifier outputs to the cabinets 5 RS 232 port Through this serial port you can upload a new firmware into the NXAMP from a computer New firmware adds new functionalities and new cabinets setups Details about the update procedure are given further in this manual 6 GPIO port This GPIO port is used for interfacing the amplifier to security system or to allow a basic remote control of the unit 7 Rear end mounting holes If the NXAMP is to be rack mounted and transported frequently be sure to support the rear end of the unit with mounting hardware that matches the size of the rack used Basic functions Reset You can reset the unit without powering off by simultaneously depressing buttons A B amp Select CH1 for 3 seconds at least 1 FLAT HO 4 ch amplifier for 3 seconds PAGE 13 OF 81 QUICK START Selecting cabinet family Simultaneously depressing A amp B buttons at power up or during device RESET accesses the system change me
84. ncreases the maximum SPL achievable with the same amplifier Active equalisation also extends system band pass especially at low frequencies where acoustical performance is limited by cabinet size User set up Array EQ 4 For each channel an Array EQ is currently implemented in the NXAMP The cut off frequency of a low shelving filter is factory tuned for each cabinet set up The user has access to the gain of this filter The array EQ is tuned in order to reproduce the effect of the bass coupling allowing the user to increase or diminish the effect of the stacking see further about the Array EQ menu or Array EQ setting from ESmonitor Equalising single component response and NXSTREAM processing 5 This equaliser set allows acting on a specific driver after the crossover rather than on the wideband section This allows to EQ one driver without affecting the others cleaning out of band response fine tuning in a crossover All the parameters are factory set Last generation of NXSTREAM algorithm are also implemented in this section This process uses sophisticated DSP program to go beyond the limits of the conventional EQ filtering to manipulate for example the phase of the audio signal independently of the amplitude and 50 Crossover section 6 Crossover between different bands is tuned for every set up of every cabinet Each crossover is customized so that each transducer will fit with its neighbor by achieving a perfect
85. nload wailine Begin the upgrade You can now confirm the download in the splash screen The Nxwin4 will detect the connected NXAMP target and then download the appropriate software AV NEXO Firmware Loader NENO Visit our Web site WWW nexo sa com Step 1 Choose file to download D LOAD2_46 dld Browse Step 2 Choose port interface Remaining Time 2 27 Update NXAMP Currently Sending Block 32 PAGE 67 OF 81 NXWIN4 SOFTWARE FOR NXAMP FIRMWARE UPGRADE At the end of the download the NXAMP will start up normally displaying the new firmware revision Using the controller after a firmware update Choosing a cabinet setup After the download of a new firmware the NXAMP powered TDcontroller will be by default in FLAT mode it means that the audio flows from the inputs to the outputs without treatment To load the wanted setup for example GeoD or PS15 you have to reset the unit by repressing buttons A B amp Select CH1 for 3 seconds at least NXAMP4x1 FLAT HO 4 ch amplifier for 3 seconds Selecting cabinet family Simultaneously repressing A amp B buttons at power up or during device RESET accesses the system change menu Keep the A amp B Buttons held until the default display appears approx 20 seconds This will allow the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and pres
86. nly accessible part during use shall be the front panel of the unit Any space above or under the TDcontroller shall be obstructed with a blank panel The rack is a free grounding and shielding structure and it provides extra shielding Therefore it is desirable that the screws used to fix the NXAMP Powered TDcontroller in the frame or rack provides an electrical contact between the chassis of the TDcontroller and the rack The primary reason for grounding is safety Conformance to the applicable requirements of the authorities having jurisdiction is of course mandatory However grounding also has an impact on electromagnetic compatibility From the EMC point of view it is desirable to have a low impedance ground network as a current flowing in the ground network will then produce low voltage in the network A low impedance network can be obtained using a multipoint ground scheme with as many closed ground loops as is economically possible Because of the amplifier weight it is mandatory to fix the amplifier both from the front panel and from the rear ears The picture bellow shows the dimensions between the rack holes on the front panel E E Ln E 88 9 sss 1 DS N NXAMP4X1 rack holes position N rack holes position PAGE 17 OF
87. nu Keep the A amp B Buttons held until Load revision disappears from screen approx 2 seconds This will allow the selection of any cabinet in any family Using the rotary encoder scroll through the configurations and press B to load the required settings NXAMP4x1 42 FA Backi Frontz2 4 Select your cabinet set up In the Options menu choose Systm Config and you will be able to choose among the different set ups within the same cabinet family i e you don t have to modify the amplifier to cabinet wiring Using the amplifier without the TDcontroller functionality If you want to use the amplifier without the TDcontroller just choose the FLAT mode setup In this mode no EQ and no protection is applied to the cabinets Please note that the amplifier will still have 2 2 ms analog input to analog output latency in that mode i e the same latency than an NX242 TDcontroller in flat mode In Flat mode full amplifier digital protections are still available and some functionality like volume control input patching mute delay gain and ArrayEQ are working Remote control can be used as well Back to default Startup the amplifier with the select 1 button down and you will have the possibility to reset the settings to default except if the local controls have been locked see further NXAMP4x1 Boot wi 25 keset PAGE 14 OF 81 WHAT S INSIDE THE CARTON BOX N B P
88. o enter the password again PAGE 45 OF 81 MENU DESCRIPTION GPIO Mode This menu allows choosing the way the GPIO are handled by the NXAMP Powered TDcontroller There is currently 5 modes of GPIO which are described bellow To change the current GPIO mode press Edit Select 4 button and turn the wheel up or down to the selected GPIO mode Once done press OK Select 4 button to validate you choice NXAMP4x1 set to MODE To put a GPI pin in the High state connect it to one of the 5 Volts output on the GPIO DB 25 connector See above in the user manual for proper pin out When nothing is connected to a GPI the state is LOW internal pull down A switch can be directly connected to this input but if a GPIO output of another device should be connected it is mandatory to ensure a galvanic insulation between the two devices Only direct connection is authorized between NXAMP when they are located in the same rack GPIO mode 0 OFF mode In this mode the GPIO port is turn off this is the default mode All the Outputs are set to 1 5 Volts and all the Inputs are unused GPIO mode 1 Basic remote control mode This mode is intended to be used with permanently High or Low state signals There is an action depending on the state of each GPI A state is validated when the state of the pin has changed and is stable for 1 second Here is the detail GPInput1 Channel 1 Mute Unmute GPInput2 Channel 2
89. o feed the inputs of the NXAMP as this processing is already included inside the NXAMP Operating SUB s fed through an Aux Output If the SUB s are to be operated through a different output than the main system NEXO strongly recommends that The audio chain is strictly identical for SUB s and MAIN SYSTEM s mixing board outputs Same devices with same settings e Phase relation between the two feeds is aligned with proper measurement tools Easera Systune Spectralab WinMLS Operation of Multiple Powered TDcontrollers Some MAIN SYSTEM SUB systems require a minimum of two NXAMP s per side one for MAIN SYSTEM s another for the SUB s Eventually two or more NXAMP s will operate within the same MAIN SYSTEM cluster It is mandatory to verify the consistency of the setups and adjustment between processors to avoid the problems described below When using multiple NXAMP s in a single array all parameters should be identical and set to proper values System alignment For a given measurement microphone or listening position the reference point for this adjustment is the closest point of each array SUB and Main System to the given position see example below PAGE 51 OF 81 INSTALLATION RECOMMENDATIONS We recommend that the system is adjusted so that arrivals from MAIN SYSTEM array and SUB speakers are coincident at a fairly distant listening position typically further than the mixing position Geometr
90. ode the backlight of the LCD remains on even if nothing is displayed 4 Encoder The default function of the encoder is to adjust the volume of the amplifier But depending on the current menu displayed on the LCD other functions can be affected such as delay adjustment or speaker setup selection 5 Navigation buttons A amp B These two buttons are used most of the time to navigate through the menus However depending on the LCD display they can be used for a specific purpose Anytime pressing the two buttons simultaneously will instantly enter the Volume menu allowing the user to adjust the volume for each channel using the encoder 6 Volume indicators These surrounding LEDs will indicate the position of the volume control for each channel similar to the position given by analog potentiometers on classical amplifiers If a channel is muted corresponding Mute button will lit red but the position of the volume control will blink alternatively for that channel allowing the user to know what will be the level once the channel is unmuted 7 Mute buttons Whatever the current menu is pressing the mute button will set or release the mute of the chosen channel The button will turn to red if the channel is muted 8 Select buttons Use the select buttons to choose the channel on which you want to adjust parameters with the encoder In most of the menus the bottom line of the LCD is used to indicate the cabinet n
91. oder LED 2 Channels Power Amplifier o EEEngine Control Block DSPs Communication Block RS232 GPIO Channel 3 Channel 4 Expansion Slot Block igi lt Digital data Communication link Power distribution link Analogue Audio Signal NXAMP4X4 Global architecture The diagram bellow shows the global architecture of the NXAMP4X4 amplifier PAGE 21 OF 81 GENERAL DESCRIPTION AC Supply Power Supply Block A Power Switch Analog Input Block Power Amplifie jam Channel 1 Channel 1 Amplifi ed Channel 3 Channel 2 Power Channel 4 Outputs Block Power Amplifier User Interface Block EEEngine LCD Switches Encoder LED Communication Block RS232 GPIO Control Block DSPs Power Amplifier EEEngine Channel 3 Channel 4 AC Supply f Power Supply Block pply Digital data Communication link lt gt Power distribution link Analogue Audio Signal Power Supply Block Power Supply is certainly the most important part of an amplifier Most of the time the Power
92. on LOAD to be phase compatible inside a same setup Software Basic MENUs and functions are more or less the same only little learning curve is needed to go from the NX242 to the NXAMP The same LOAD and NXWIN software are used to update both TDcontrollers and NXAMP Powered TDcontroller firmware The transition is transparent for the user Note however that the NXAMP can t be flashed with LOADs prior to 2_46 and must use NXWIN 4 software What s changed Integrated amplifier The most notable improvement is the integration of the amplifier module that will simplify the cabling from the user point of view but also allow a much more efficient integration of loudspeaker controller with the amplifier needs Thus the digital controller becomes also an amplifier controller This is not simply two units inside the same box but a powerful use of the DSP resources for both cabinets and amplifier being driven PAGE 7 OF 81 NXAMP VERSUS NX242 WHAT S NEW Computing resources The DSP resources have been multiply by 3 5 between the NX242ES4 and the NXAMP so it means by 7 between the NX242 and the NXAMP This will ensure that the NXAMP will have enough DSP resources to deal with many years of algorithm improvements Other key components like CPU speed memory quantities and so on have been also upgraded Four separate inputs The analog input stage now offers 4 separate symmetrical inputs each on XLR with link due to the 3U on
93. onnectors and its chassis The TDcontroller can sustain high current in pin 1 without degradation of output noise We recommend that the sources and loads you use have the same desirable characteristics It is sometimes claimed that connecting cable shield at both ends creates ground loops and that the current flowing in such loops will produce noise This is not the case for most professional audio equipment In short there are two kinds of loops in which voltages are present the loops formed by signal wires and the loops formed by grounded conductors among which are protective earth conductors PE and signal cable shields Mixing Desk PE Safety FE Ground NXAMP4x1 IN POWER OUT When a cable shield is grounded at both ends a loop is closed and the resulting current causes a reduction of the voltage induced on signal lines This effect is what the cable shield is intended to produce since this is how it protects your signal from magnetic fields If you are using an asymmetrical unbalanced source not recommended it is best to use a shielded twisted pair and to connect wire 3 of the cable to the shield at the source output end see figure bellow PAGE 19 OF 81 SETTING UP ADVICE Mixing Desk Safety Ground This technique prevents noise currents flowing on the return path of the signal Note that this is only acceptable for a short cable power outputs wirin
94. ound OUT Port This Port features an Ethercon connector Always use this type of connector to secure your Ethersound network from unwanted unplugs This type of connector also ensures a longer life to the internal RJ 45 contacts because if preserves it from external traction Use this port as an Ethersound OUT port when connecting to an Ethersound network 4 Remote ES100 port The ES100 is an upgrade of the original Ethersound standard It offers new functionalities but can also be downgraded to standard Ethersound network for compatibility with older devices See bellow for details This Remote ES100 port is a remote control port only that is only designed to be used with ESmonitor the remote control software for Ethersound network Connect the PC computer running ESmonitor to this port WARNING Do not use this port if your NXAMP Powered TDcontroller is used in an Ethersound network with some non ES 100 devices see bellow for details On top of this RJ 45 plug you will find 2 LEDS The left one is for Link meaning that equipment is well connected to the plug the right one is for Activity meaning that some Ethernet frames are received on the port Various Ethersound devices description Here is a short reminder about various Ethersound devices PAGE 55 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL Mono directional non ES100 devices Simplest Ethersound devices are mono direct
95. s B to load the required settings NXAMP4x1 42 WE P Backi 5 Frontz 4 SELECT O Select your cabinet set up In the Options menu choose Systm Config and you will be able to choose among the different set ups within the same cabinet family i e you don t have to modify the amplifier to cabinet wiring or eventually between all families see above PAGE 68 OF 81 TECHNICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS POWER SPECIFICATIONS FOR NXAMP Powered TDcontroller Number of channels 4 channels 3 channels 2 non bridged 1 bridged or 2 channels 2 bridged NXAMP4X1 NXAMP4X4 600 W non bridged 1900 W non bridged 1800 W 2 channels bridged 6600 W 2 channels bridged 900 W non bridged 3300 W non bridged 2600 W 2 channels bridged mode 8000 W 2 channels bridged 1300 W non bridged 4000 W non bridged 10 W Standby 100 W Idle 1100 W 1 8 Power 20 W Standby 150 W Idle 3000 W 1 8 Power SPECIFICATIONS FROM ANALOG IN TO POWER OUT Analog Inputs channels 4 channels analog inputs on XLR 3 with a second XLR 3 for linking 0 5 dB from 10 Hz to 20 KHz 20 KOhm 28 dBu All Channels 105dB unweighted Typical 0 1 flat setup 2 2 ms flat setup Compatible with NX241 and NX242 Dedicated version for 100 120 Volts or 220 240 Volts FRONT AND BACK PANEL FEATURES Audio Inputs Max output power 8 22 Max output power 4 Q Max
96. s we need another set of VCEQ this is first displacement band pass block 9 to protect from another peak of secondary displacement All these VCEQs have separate shaping filter separate action filters for VCEQ and separate Ratio Attack and Release time Mechanical stress control 10 11 Whereas some frequency areas are dangerous at high level due to excessive displacement of the loudspeaker see above there is another area where the displacement of the loudspeaker is minimum but then the mechanical stress on the cone during large input signals is maximum To protect from overstressing the loudspeaker VCEQ process can also be used in these PAGE 31 OF 81 BLOCK DIAGRAM DESCRIPTION particular area this is block 10 As with displacement VCEQ another set of mechanical stress VCEQ is needed for band pass cabinets this is block 11 HF displacement control 12 In case of passive setups a channel will deal with several loudspeakers after passing through the passive filter of the cabinet That is why as previous VCEQs deal with LF loudspeaker another set of VCEQ is needed to protect HF driver from excessive displacement HF acceleration control 13 Excessive acceleration on the HF driver can lead to the destruction of the diaphragms Another set of VCEQ is added here to protect HF driver from over acceleration Global purpose VCEQ 14 The internal structure of the VCEQs processes inside the DSP allow up to eigh
97. s the default setup it means no EQ Flat and no protection No protn for the speakers but of course amplifier protections will still work Adjusting Volume The volume of each channel can be adjusted from the Volume menu unit is dB Bellow is a picture of this menu NXAMP4x1 SELECT PEAK O protect PROTECT SIGNAL PAGE 35 OF 81 MENU DESCRIPTION The volume setting for each channel can always be clearly seen from the front panel surrounding LED white blue around each mute button The position of the LED gives the value of the volume like it would be for a traditional analog volume pot The picture bellow gives the attenuation value for each LED The attenuation value can also be read on the LCD screen To change the attenuation for a given channel select the channel first by pressing the corresponding select button The channel name on screen will then be put between bracket see on the picture above channel 2 is selected Then turn the wheel to change the volume setting You can select multiple channels by pressing several select buttons at the same time When a selected channel reaches the maximum value it will cease to increase by continuing to turn the wheel but other selected channels may still increase the setting be careful not to change a gap between two channel settings when selecting multiple channels at the same time Please note that all the LEDS for volume ind
98. signal level being reduced for an extended period pumping effects the detection signal is modulated by another voltage integrated with faster time constants matching the sound level subjective perception This allows the controller to reduce the effective operation duration of the temperature limiter and make it sound more natural while the efficiency of protection is fully preserved and operation thresholds are unaffected kept as high as possible In case of passive cabinet another set of temperature simulation is done to protect the H F driver this is block 17 PAGE 32 OF 81 BLOCK DIAGRAM DESCRIPTION The so called Physiologic Dynamic Control see block diagram is intended to avoid unwanted effects as a result of a too long attack time constant By anticipating the operation of the temperature limiter it prevents a high level Audio signal appearing suddenly then being kept up for a period which is long enough to trigger the temperature limiter Without this a rough and delayed gain variation would result which would be quite noticeable and unnatural The Physio control voltage acts independently on the VCA with its operation threshold slightly lower 3 dB that of the temperature limiter and a low compression ratio its optimised attack time constant allows it to start operating without any subjectively unpleasant transient effects Interchannel regulation 19 As described before each transducer is individually s
99. slightly incorrect alignment If we add to this the delay introduced by a slightly different electric path plus the small delay introduced by some processing plus a EQ filter done by the user near the cut off frequency The graph above could shows differences in excess of 6dB Up to the point where the system might work better if you reverse the polarity of the sub Precautions amp check Before using the AUX send of your desk ensure that the outputs are in phase you can feed a 100Hz signal at the input and monitor the MAIN and AUX on a dual trace scope Always apply EQ or processing to all signals feeding the NXAMP So the phase relation is not affected PAGE 73 OF 81 APPLICATION NOTE DRIVING THE SUB FROM THE AUX SEND Never add additional low pass filtering on the SUB or high pass to the main system Inverting polarity on one channel should always result in a massive difference near the crossover point If the sound is more or less the same the system is no longer aligned PAGE 74 OF 81 APPENDIX A LIST OF SUPPORTED PRESETS LOAD2_51 Appendix List of Supported presets LOAD2 51 Please see the 10402 51 setups pdf included in the documentation to see a complete list of presets supported by LOAD 2 51 by the NXAMP Please refer to the documentation enclosed with the firmware if the one loaded in your NXAMP is not LOAD 2 51 Keep in mind that you should hold the A amp B buttons down when resetting the NXAMP Po
100. sture The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The above warning is located on the top of the unit IMPORTANT SAFETY INSTRUCTIONS To avoid electrical shock do not remove covers Dangerous voltages exist inside Refer all servicing to qualified personnel only Compliance with FCC regulations does not guarantee that interference will not occur in all installations If this product is found to be the source of interference which can be determined by turning the unit OFF and ON please try to eliminate the problem by using one of the following measures Relocate either this product or the device that is being affected by the interference Utilize power outlets that are on different branch circuit breaker or fuse circuits or install AC line filter s In the case of radio or TV interference relocate reorient the antenna If the antenna lead in is 300 ohm ribbon lead change the lead in to co axial type cable If these corrective measures do not produce satisfactory results please contact the local retailer authorized to distribute this type of product If you can not locate the appropriate retailer please contact the After Sales department of NEXO SA Parc d Activit du Pr la Da
101. such as in LAN connections between buildings Fiber optic is also very valuable where electronic emissions or electro magnetic interferences may have an impact on the network e g on particular factory floors Furthermore fiber optic cables and Ethernet standard allow for segments up to two km 1 24mi long cf thin coaxial 185m 607ft UTP 100m 328ft and thus permit to connect remote nodes and buildings that otherwise would not be accessible To use Fiber Optic cable in EtherSound networks Media Converters or dedicated Ethersound devices such as AVAVRed ES100 FoNeutrik EtherSound Redundant link with 2 multimode optical OptiCon Neutrik connectors must be used Installation inside the NXAMP To install the NXES104 card inside an NXAMP Powered TDcontroller first remove the two screws on each side of the NX DLFT card on the rear of the amplifier Keep these screws as they will be used with the NXES104 card Use a small screwdriver to slightly separate the NEXO NEXO NX DFLT NXAMP4x1 o 1 878 818 eS Slide the NXES104 board inside the rails and push it firmly inside the NXAMP Then put the two screws back to fix the NXES104 on the rear panel of the NXAMP N B Keep the NX DFLT card in a safe place as you would need to put it back if you decide to remove the NXES104 board for some reason Do not use the NXAMP Powered
102. t different VCEQ in case you need extra VCEQing for dynamic EQ or whatever Loudspeaker Peak limiters 15 These loudspeaker peak limiters are here to avoid huge amounts of power being sent to a driver Each driver is protected in temperature and displacement but there could be other factors of destruction that cannot be predicted by simulation especially mechanical damage to the cone Each driver is specified for a certain power handling and a factory set peak limiter threshold is tuned to avoid any abuse A two steps peak limiter is used here each with a separate set of threshold ratio attack and release Temperature control 16 17 The sense signal from amplifier output is fed into a shaping filter each one producing a signal proportional to the instantaneous current flowing into the voice coil of the transducer After rectification this signal is integrated with attack and release time constants equivalent to the thermal time constants of the voice coil and chassis producing a voltage which is representative of the instantaneous temperature of the voice coil When this voltage reaches the threshold value corresponding to the maximum safe operation temperature the VCA or the VCEQ becomes active to reduce the Audio signal level and limit the effective temperature to fall under the maximum usable value In order to avoid detrimental effects induced by very long release time constants coming from the temperature detection
103. tter N or colored BLACK BROWN LIVE The wire which is colored BROWN must be connected to the terminal which is marked As the colors of the wires in the mains lead of this apparatus may not correspond with the letter L or colored RED with the colored markings identifying the terminals in your plug proceed as follows This applies only to products distributed in the United Kingdom COMPLIANCE INFORMATION STATEMENT DECLARATION OF CONFORMITY PROCEDURE 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation See user manual instructions if interference to radio reception is suspected This applies only to products distributed in the United States of America EUROPEAN MODELS Purchaser User Information specified in EN55103 1 and EN55103 2 Speakon D Speakon C Speakon B Speakon A Inrush Current 16 A Conforms to Environments E1 E2 E3 and E4 This mark indicates a dangerous electrically live terminal When connecting an external wire to this terminal it is necessary either to have a a person who have received appropriate guidance on handling make the connection or to use leads or a cord that have been manufactured in such way that the connection can be made simply and without problem TABLE OF CONTENT TABLE OF CONTENT PRECAUTIONS ERREEREEETRRETRTECRRERETEDCSREBUCEEREVRIDROENUERNCRENCEPSEIRIEEENEE
104. used FTP stands for Overall Foil Shielded Twisted Pair ScTP for Screened Twisted Pair Cable is wrapped with an aluminized plastic foil That kind of cabling is not recommended for applications where the cable is repeatedly bent The foil tends to break leading to severe loss of performance over the distance PAGE 58 OF 81 NXES104 EXPANSION BOARD AND REMOTE CONTROL WARNING Do not use FTP cabling for live application STP stands for Shielded Twisted Pair Screen is made of copper braid SFTP stands for Overall Braid Foil Shielded Twisted Pair Foil screen and braid shield For all these cables transmission characteristics are the same The difference is the behavior with respect to electromagnetic interference We recommend cabling that has a superior quality sleeve in order to protect the cable Ideally this sleeve should halogen free in order to comply for the installation standards Bellow is some various cables that have been seriously tested by Auvitran see www auvitran com for more information Manufacturer Cable TYPE nax length Max length Specific comments on tested cables Reference without Error ffor reliability Ruggedized Cat6 Cable Shielded AWG24 difficult to fit in standard RJ45 male plugs Blue BELDEN BELDEN CAEGROUPE CAEGROUPE CAEGROUPE gt gt DRAKA Harting KLOTZ KLOTZ LINK LINK Neutrik Proplex Proplex 7860E FTP 130 m 110 m 1875GB UTP 120 100
105. ut A DB for Digital Input B DC for Digital Input C and DD for Digital Input D NXAMP4x1 D DA DB DC DD InPatch ul T SELECT Q If one of the inputs is between brackets it signifies that the input is currently patched to the channel displayed on the bottom line of the screen in the example above Analog input A shown as AA is patched to the PS15 on the channel 1 of the amplifier You can toggle the status of the input which is blinking by depressing the B button If the brackets appear around this input the patch is ON if it is clear then the patch is OFF You can go from one input to the other by turning the wheel DIGITAL TD CONTROLLER 4 InPFatch Of course several inputs can be patched to one output in the example above Analog input C and Analog input D are summed to the PS15 on channel 1 Be careful when patching both analog and digital input together to one channel It is very unlikely that the two signals can be in phase We recommend using this solution only for analog backup of digital network meaning that only digital or analog inputs will be used at a time PAGE 41 OF 81 MENU DESCRIPTION Once a channel is patched you can edit the patch for another channel by depressing the A button Back and selecting another channel or simply by directly pressing the corresponding Select button for another channel then the name of that channel will appear on the bottom line of the LC
106. utlet when the device is not to be used for extended periods of time or during electrical storms When removing the electric plug from the device or an outlet always hold the plug itself and not the cord Pulling by the cord can damage it If you are using the NXAMP4X4 be sure to plug each power cord into separate branch circuits employing separate service grounds Plugging into the same circuit can result in electrical shock To disconnect the NXAMP4X4 from the mains unplug both power cords Location e When transporting or moving the device always use two or more people Attempting to lift the device by yourself may damage your back result in other injury or cause damage to the device itself Before moving the device remove all connected cables When setting up the device make sure that the AC outlet you are using is easily accessible If some trouble or malfunction occurs immediately turn off the power switch and disconnect the plug from the outlet Even when the power switch is turned off electricity is still flowing to the product at the minimum level When you are not using the product for a long time make sure to unplug the power cord from the wall AC outlet If this device is to be mounted in an EIA standard rack leave the back of the rack open and make sure that it is at least 10 cm away from walls or surfaces Also if this device is to be mounted with devices that tend to generate heat such as power a
107. wered TD controller to switch from one family of setups to the other PAGE 75 OF 81 APPENDIX B HOW IS MEASURED THE AMPLIFIER POWER Appendix B How is measured the amplifier power This part of the document describes the setup we have used to measure the power available on the NXAMP Powered TDcontroller outputs for each load 8 4 and 2 Ohms General description of the setup The drawing bellow shows the setup used to measure the output power 9 Audio Generator with Distortion Analyzer Digital Scope Hi a eb bonne The Audio Generator with distortion analyzer is used to generate test signals It analyzes the output of the amplifier to measure the THD N thus we can know when we reach the clip of the amplifier with a certain value of distortion typically 1 The NXAMP under test is powered through a monitored power supply with voltage adjusted to 230 Volts 2 0 Volts and 50 Hz The 4 analog inputs of the NXAMP Powered TDcontroller are linked together so all the channels are fed DSP setup is FLAT NO PROTN meaning that no EQ or gain is applied and that only the amplifier protections are working The volume is set to 0 dB attenuation Each output of the amplifier is connected to a dummy load 8 4 or 2 Ohms On one channel we loop the voltage back to the distortion analyzer and to a digital scope to PAGE 76
108. xt letter Depressing button select 1 for Prev will go back to the previous character When the last letter has been reached press the B button again to actually save the setup A confirmation message will be displayed on screen NXAMP4x1 Savins Sellines rtionz Once the settings are saved the unit will go back to the default screen but the scene number will be displayed on top right corner of the LCD screen as shown on the picture bellow NXAMP4x1 01 257 To recall a user setup select the memory block you want to use by turning the wheel till the chosen memory block appears on the top line of the LCD screen Then press the Select 4 button for Recall Anytime you can exit this menu by depressing the A button for PAGE 43 OF 81 MENU DESCRIPTION Once the button Recall has been pressed a confirmation step is added Choose Yes to go on with recalling this is button Select 4 or No to go back to the previous screen NXAMP4x1 If the selected user setup is recalling a different speaker setup that the one currently in use another confirmation message will be displayed Choose Yes to go on with recalling this is button Select 4 or No to go back to the previous screen 1 Cabinet Famils will chanse Are Sure 7 ue DIGITAL TD CONTROLLER Security The menu allows locking the local control or the re
109. ystems set ups during use the following procedure is recommended This procedure has been purposely designed to avoid any mistakes It is nevertheless very easy to change set up among the same family or between families see further System config NXAMP4x1 42 PA 1 5 Frantz SELECT O PAGE 34 OF 81 MENU DESCRIPTION Repressing A amp B buttons while the NXAMP is starting this last 2 seconds At the end of the boot time the above screen should appear while the amplifier part itself starts up this last around 18 seconds and ends when you hear the output relays moving and see the Amp Protect LED shutting down Please note that you don t need to wait for the amplifier to start for choosing your cabinet setup You should then see the two up and down arrows surrounded in the above drawing This means that you can change the speaker setup by turning the wheel Select the appropriate setup by pressing OK button B or press the button A to go back to current setup without changes N B You can reset the unit without powering off by simultaneously repressing buttons A amp SELECT CH1 at the same time for at least 3 seconds N B The setup number is blinking when the currently displayed setup is different from the one running into the DSP at the moment Note Selecting a new family will set all parameters to factory default settings N B The setup number 0 FLAT PROTN I

NXAMP4x1 & NXAMP4x4 User Manual

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NXAMP4x1 &amp; NXAMP4x4 User Manual

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NXAMP4x1 & NXAMP4x4 User Manual