FLX Series - Manual - (after initial review)
Contents
1. Input Connector t Male TRS Ground 7 Shield 2 4 2 Unbalanced Single ended Input Connections When using an unbalanced input source and connector a jumper must be added between the negative terminals and the ground terminals Once this has been done the source can be connected to the positive and ground terminals Please refer to the manual of your input source in case it does not follow the standard pin out For your conven pre wired connectors are available for purchase see the next page for details NOTE A jumper is required for connecting an unbalanced input Input Connector Ground 4 RCA A jumper has been added between the zo negative terminals and ground Input Connector 4 R cL Ground Shield AC A jumper has been added between the negative terminals and ground Ground Shield NOTE The FLX Series of amplifiers do not accept stereo inputs Either one side must be selected from the stereo source or an overload protected Y cable must be used to sum the left and right channels to mono It is highly rec ommended that you purchase the pre wired connectors on the following page Damage to source equipment can re sult from the use of a standard Y cable 10 Pre wired single ended unbalanced2. 20Hz 20kHz 4 80 100Hz 20kHz Constant Voltage 0 196 5100 dB 1V 0 dBV 7 2 3 6kQ 1 2 Contact closure TBD D 0 10V Contact closure 3 5mm terminal block 5mm terminal block RJ 45 Power Standby USB RS 232 RVC Internal 110 240VAC 50 60Hz Convection Cooling Aluminum Chassis Rack mountable BA 5 5 lbs max varies by model Stewart Audio reserves the rate to change features and specifications without notice 27 6 Warranty Information 6 1 Warranty Summary Stewart Audio amplifiers and accessories unless excluded in this summary are covered by a 3 year limited warranty on parts and labor from the data of purchase In order to be eligible for warranty repairs the amplifiers and accessories must have been purchased through an authorized Stewart Audio dealer and submitted by the original purchas er This warranty is only valid in the country in which the amplifier was purchased 6 1 1 Eligibility Requirements Stewart Audio warrants against all malfunctions which come as a result of component or manufacturer defect The amplifier is also covered from all failures which arise during the warranty period 3 years from date of purchase that are not a result of misuse The following actions will void your warranty e he power cord or AC plug has been damaged through misuse e he amplifier has been exposed to moisture or extreme tempera tures e he amplifier has been dropped items
3. RA is required for product being sent to the factory for service 2 See packing instructions in Section 6 2 3 3 Ship the defective product using a method which provides for or der tracking or order confirmation The service center is located at the following address Stewart Audio 14335 Cuesta Court Suite C Sonora CA 95370 4 Use a bold black marker and write the RA number on three sides of the box 5 Record the RMA number for future reference The RA number can be used to check the repair status 6 2 3 Packaging Instructions Should Stewart Audio request that you ship your product to their ser vice center these instructions must be followed in order to ensure safe delivery If they are not followed Stewart Audio assumes no responsi bility for damaged goods and or accessories that are sent with your unit 29 6 2 3 Packaging Instructions cont 1 Please write the RA number on three sides of the box Include the Stewart Audio RA number inside the box and a brief description of the problem You will be advised during the RA process what accessories should be included with the amplifier Power supplies connectors cords etc This is dependent on the failure assessment When shipping your amplifier it is important that it has adequate protection We recommend you use the original packing material when returning the product for repair If you do not have the origi nal box see number 4 If you prov
4. Standby LEDs Q RS232 Connector 3 5mm e Power Connector IEC included Dante Network Connector RJ 45 10 100 240VAC 50 60HZ 0 8A o Output Connections 5mm e Input Connections 3 5mm 17 3 3 1 Indicators FLX Series amplifiers have 2 front panel LED indicators The first is the power indicator which will illuminate when power is supplied to the amplifier There is no power switch so the unit will remain on continu ously when plugged in The second LED indicator illuminates when the amplifier is in standby sleep mode 3 3 2 Controls FLX Series amplifiers have an integrated digital signal processor DSP providing considerable control of the audio signals A set of DSP func tions is available for each signal path A powerful cross point mixer provides a means of routing and mixing signals from the various inputs both local and network to the network and local outputs The amplifi ers are configured entirely via Stewart Audio s DSP Control Center soft ware via a USB link The most current version of the Control Center software can be downloaded via the following link http www stewartaudio com DSPCC DSP Control Center manual can be downloaded at http www stewartaudio com DSPCC A flow chart of the DSP chain for each input and output is displayed on the following page FLX amplifiers have 4 local and if network ena bled 4 network inputs The number of outputs depends on the spe ci
5. and operational benefits that simply cannot be found in conven tional amplifiers e Dante interface available e Integrated DSP for signal routing filtering and bridging e USB and RS 232 control and configuration e Available in both low impedance and constant voltage models e Phantom power e Made in the USA 1 2 Using this Manual In order to obtain maximum performance from your FLX Series Amplifi er please take time to read this brief owner s manual and carefully fol low the guidelines for connection and operation This manual provides you with the information necessary to safely in stall and operate your new FLX Series amplifier in the most common scenarios If you find yourself requiring additional assistance please feel free to contact your Authorized Dealer or you may contact us di rectly using the contact information provided on the back of this manu al 2 Setup 2 1 Setup Precautions CAUTION Before installing your amplifier make sure that you have read the Important Safety Precautions at the be ginning of this manual 2 2 Amplifier Installation Two rack mounting options are available for the FLX Series amplifiers A single rack mount kit provides for installation of a single FLX Series amplifier on a 1RU rack The dual rack mount kit provides for the instal lation of two FLX Series amplifiers side by side on a single rack 2 2 1 Single Rack Mount Kit Part Number RKMHLF S Assembling the single rack moun
6. 6 3 3 Controls Indicators and Connectors 17 3 4 Dante eee eee 22 3 5 Remote Volume Control 25 4 Troubleshooting 26 5 Technical Specifications 27 6 Warranty Information 28 6 1 Warranty Summary e 28 6 2 Return Procedure m 28 7 Accessories e eee 31 1 Welcome ee STEWARTAUDIO The Difference is Hear Congratulations on the purchase of your new Stewart Audio FLX Series power amplifier This amplifier has been designed and built to provide you with years of high quality audio performance and trouble free oper ation If after reading this manual you should have any questions con cerning amplifier installation and operation please contact your Author ized Stewart Dealer or you may contact us directly using the contact information provided on the back of this manual 1 1 Features The FLX Series of amplifiers are the 15 family of half rack commercial amplifiers on the market offering 320W of power to incorporate inte grated DSP This unique combination of power and features allows these amplifiers to be tailored to the zone application room acoustics and speakers saving time and budget Your Stewart Audio FLX Series amplifier is the result of years of experience in the design and manufac ture of quality amplifiers As such it provides a combination of perfor mance
7. Because the FLX Series amplifiers are convection cooled with no fans amplifiers must be given adequate space to allow for proper airflow Do not stack the amplifiers on top of each other or mount them in a way that other equipment will block airflow through the case CAUTION Inadequate airflow to the amplifier can cause the amplifier to overheat and potentially become damaged in the process Be sure to provide plenty of air space to allow for convection cooling 2 4 Input Connections Your FLX Series amplifier is provided with a four 4 removable 3 pin 3 5mm terminal block connectors one for each local input This con nector will accept both balanced differential or unbalanced single ended connections however some modifications must be made for an unbalanced connection See the next three sections for instructions on connecting your amplifier to its input source Channels 1 and 2 can be line or mic inputs with software controlled phantom power available channels 3 and 4 are line only inputs 2 4 1 Balanced Differential Connections When using a balanced input source and connector you must ensure that the hot cold and ground pins of the connector are matched up to the and ground pins of the amplifier s connector respectively Dia grams have been provided for standard XLR and TRS connectors Please refer to the manual of your input source in case it does not fol low the standard pin out Input Connector
8. E Sets CHAN volume to VOL VOLUME_STATUS Return CHAN volume in the format 0x06 VOL 0x0A FORCE_MUTE_ON Turn mute off for CHAN FORCE_MUTE_OFF Turn mute on for CHAN MUTE_TOGGLE Toggle mute on CHAN MUTE_STATUS Return CHAN mute status in the for mat CHANGE_PRESET Change to PRESET FIRMWARE_VERSION Returns the current version in the for mat 0x02 OxXX OxYY 0x03 XX Version Revision 20 0x12 0x12 0x12 0x12 0x12 0x12 0x12 0x12 0x12 0x12 0x16 0x17 0x18 0x07 0x08 0x09 0x10 0x11 0x12 0x13 CHAN OxdB 0x03 CHAN OxdB 0x03 CHAN VOL 0x03 CHAN 0x03 CHAN 0x03 CHAN 0x03 CHAN 0x03 CHAN 0x03 PRESET 0x03 0x13 0x03 1 The CHAN is as follows 0x00 is all channels 0x01 is CH1 0x02 is CH2 etc 2 The VOL is the attenuation in dB relative to full volume 0 dB This should be entered as a positive value between 0 and 60 0x00 to Ox3C Hexidecimal 3 The PRESET is zero based in the range 0x00 0x09 21 3 4 Dante Your network enabled FLX Series amplifier can act as a network break in break out box as well as an amplifier with local inputs and outputs Audio signal routing and configuration is done using the Dante Control ler software from Audinate at www audinate com Select Dante Controller under the Products section This will require registration for Audinate s portal and also includes access to the Dante C
9. STEWART The Difference is Hear FLX Series STEWART gt a POWER STANDBY mr 68 PES 100 240VAC 50 60HZ 0 8A 1 2 3 4 REMOTE RS232 1 2 3 4 OUTPUT INPUT Owner s Manual FLX Series October 2014 Important Safety Instructions Before using your Stewart Audio Inc Power Amplifier please read this Owner s Manual carefully to ensure optimum trouble free perfor mance WARNING TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT EX POSE THIS AMPLIFIER TO RAIN OR MOISTURE DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE DO NOT OPEN THE CABINET REFER SERVICING TO QUALIFIED PERSONNEL ONLY CAUTION DO NOT OPEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lighting bolt within arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product s enclosure that may be of sufficient mag nitude to constitute a risk of electrical shock to person The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instruction in the literature accompanying the appliance Important Safety Instruction Please Read Prior to Product Installation 1 Installation should be per
10. connectors are available for pur chase from Stewart Audio These will allow for a quicker installation with less room for error when connecting the FLX Series amplifier to an unbalanced source The summing adapters will properly sum a ste reo source for use with the mono input on the rear of the amplifier without causing sound cancellation Part numbers are found below the diagrams ADPT RCA ADPT SUMRCA ADPT SUM35 Mono Stereo Stereo Female RCA Female RCA Female 3 5mm 11 2 5 Output Connections 2 5 1 Low Impedance 89 Models Stewart Audio recommends using high quality heavy gauge speaker wire and connectors to send the output signal of your amplifier to the speakers Use the following table as a guideline when selecting your wire gauge Distance Wire Gauge Up to 25 ft 16 AWG 26 40 ft 14 AWG 41 60 ft 12 AWG Speaker leads connect by means of removable terminal block connect ors supplied with the unit Strip speaker leads 1 4 and insert into con nector observing proper polarity With a small flat blade screwdriver tighten the screw until the leads are held securely in place Inspect for possible shorts or broken wires Output Connector Re i Channel 1 Channel 2 Channel 3 Channel 4 12 It is possible via the DSP Control Software to bridge two outputs Thus a four output FLX 80 4 can be configured for four 80W outputs two 160W outputs or one 160W output and two 80W outputs 2 1 con
11. ct either speaker terminal to ground This will cause a short circuit which may dam age the amplifier speaker or both CAUTION The speaker terminals represent a shock haz ard as they carry 70 7V and 100V when driven with an audio signal Disconnect the amplifier from the AC pow er source when working on these terminals gt Output Connector 70V COM 100V 70V COM 100V 70V COM 100V 70 COM 100V Channel 1 Channel 2 Channel3 Channel 4 kaud i i Step down transformer at each speaker P 2 6 Network Connector An RJ 45 connector is provided on Dante network enabled models Connect this port to your audio transport network switch or router see Section 3 4 Dante Network and cable requirements are available from the Audinate web site at www audinate com All network enabled FLX amplifiers are shipped from the factory with network input 1 routed to local output 1 via the internal DSP software mixer If the FLX model has more than one local output the corre sponding network input is routed to the local output with the same number designation This can be changed as desired via the DSP Con trol Center software 3 Operation 3 1 Operating Precautions 1 Before use your amplifier must be configured for proper operation including input and output wiring hookup Improper wiring can re sult in damage to equipment or potentially harm to the operator Consult Section 2 for setup instructions 2 Tamp
12. entiometer and knob for re mote volume control Black WP RVC A Wallplate with 10k potentiometer and knob for re mote volume control Aluminum To purchase these accessories or to see the full Stewart Audio product lineup visit us at www stewartaudio com For Your Record In the spaces provided below record the model and serial number located at the rear of your amplifier Model No Serial No Purchase Date
13. ering with the circuitry or making unauthorized changes is not only dangerous but may also violate local regulations 3 Use care when making connections between the amplifier and the input or output equipment Using equipment that is not capable of handling the output wattage may lead to permanent damage NOTE Stewart Audio will not be held responsible for damage to your FLX Series amplifier or connected equip ment if the instructions in this manual are not followed 3 2 Model Configurations The basic differences between the FLX models are outlined in the table below o J xs 4 FLX 80 4 RX804CV FLX 160 2 Fx 1602 cv FLX320 1 us Power per ECE into 80W 160W 320W 2254 Channel 4 80 70 100V 70 100V 70 100V No local Inputs local local Inputs 4 balanced 2 mic with phantom power No local Outputs 4 unbridged 2 or 3 bridged No Network 4 4 4 4 4 4 4 4 Inputs Outputs There are two possible bridge modes for the FLX80 4 model When this model is operated in a bridge mode be sure to review the settings in the matrix mixer to be certain the network inputs s is are routed to the desired output s 16 3 3 Controls Indicators and Connectors 9 STEWART POWER STANDBY 2 1 NETWORK FLX 80 4 WP BEEM 1 2 3 REMOTE RS232 i 2 3 4 OUTPUT T 8 USB 2 0 Connector Remote Volume Connector 3 5mm e Power
14. fic model and the mode bridged or unbridged The cross point mixer is shown below Matrix Mixer 8 Output 1 Output 3 Output 4 Output 2 Local Input 1 Local Input 2 Local Input 3 Local Input 4 15 15 15 Sine Wave 25 25 25 35 35 ET 35 Pink Noise Outputi Output2 Output3 Output4 18 EG Blocks Adjustable Pregain Adjustable Pregain Adjustable Pregain LOCAL INPUT 1 EG 6 Blocks 3 Blocks LOCAL INPUT 2 EG 6 Blocks 3 Blocks LOCAL INPUT 3 6 Blocks EQ 3 Blocks 5 ac as S 5 5 5 5 aD 5 a 4 E E E E LOCAL INPUT 4 NETWORK OUTPUT 1 Compressor Compressor Compressor Compressor a 3 Blocks NETWORK INPUT 1 NETWORK OUTPUT 2 a 3 Blocks NETWORK INPUT 2 NETWORK OUTPUT 3 3 Blocks NETWORK INPUT 3 NETWORK OUTPUT 4 ines 3 Blocks Low Shelf High Shelf Peak PEG Notch EG Blocks High Pass 1st 2nd Order Low Pass 1st 2nd Order 19 NETWORK INPUT 4 3 3 3 RS 232 Commands An RS 232 port allows remote control of selected amplifier functions The RS 232 commands are defined in the table below and on the next page Command Name and Description Hex Command VOLUME UP Increases volume by dB on CHAN VOLUME DOW1 Decreases volume by dB on CHAN VOLUME DISCRET
15. figuration When the amplifier is bridged the speaker connections differ from when the amplifier unbridged For example if outputs 1 and 2 are bridged the speaker leads are connected to the positive ter minal of output 1 and the negative terminal of output 2 The figure be low shows proper connections when both pairs of outputs are bridged Output Connector Boe oe umi Channel 1 2 Channel 3 4 Bridged Bridged Speaker Connection Diagram for Bridged Output CAUTION Do not connect either speaker terminal to ground This will cause a short circuit which may dam age the amplifier speaker or both 2 5 2 High Impedance Constant Voltage Models Because the current flow in constant voltage systems and speakers is much lower than in 8 systems higher gauge thinner diameter wire can be used Please refer to the following chart to choose the appro priate wire gauge for your installation Distance Wire Gauge Up to 500 22 AWG 500 1000 ft 20 AWG Over 1000ft 18 AWG Speaker leads connect by means of removable 5mm terminal block connectors supplied with the unit Strip speaker leads 1 4 and insert leads into connector observing proper polarity With a small flat blade screwdriver tighten the screw until the leads are held securely in place Inspect for possible shorts or broken wires NOTE Class 2 wiring must be used on the speaker termi nals to comply with UL requirements CAUTION Do not conne
16. formed by a trained and licensed professional to insure safe and lasting operation 2 All of the safety and operating instructions should be read before the am plifier is installed or operated Retain these instructions for future refer ence All instructions should be followed all warnings on the amplifier and in the operating instructions should be adhered to 3 The amplifier should be situated so that its location and position does not interfere with its proper ventilation For example the amplifier must not be placed on a rug bed sofa or similar surface that impedes airflow across the chassis Airflow through the ventilation openings should be unobstructed 4 This amplifier should not be used near water for example near a bathtub in a wet basement near a swimming pool etc This amplifier is intended to be operated in a controlled indoor environment 5 Do not place the amplifier near heat sources such as radiators heat regis ters stoves or other appliances that produce heat 6 The amplifier should only be connected to 100 240 VAC 50 60 Hz power supply Do not defeat the ground or polarization of the power plug 7 Route power cord and other cables so that they are not likely to be walked on tripped over or stressed Pay particular attention to condition of cords and cables at plugs and at the point where they exit the amplifi er To prevent risk of fire or injury damaged cords and cables should be replaced immediate
17. have been dropped on the amplifier or the enclosure has been damaged e The amplifier has been opened by the operator e The amplifier was improperly packaged when sending to the fac tory for repair resulting in damage e Any of the precautions or instructions found in this manual were not followed Damages resulting to the amplifier which are not covered under this warranty can be factory repaired at cost to the customer Use the con tact information below to initiate the repair process 6 2 Return Procedure This section includes the return procedures which must be followed in order to prevent processing delay or cost to the customer Please read the entire section before contacting Stewart Audio for returns 28 6 2 1 Return Authorization Number All returns to the factory for service must be accompanied by a Return Authorization RA number One can be obtained by contacting Stewart Audio at 209 588 8111 or via e mail at support stewartaudio com NOTE Any defective products received without an RA number will be returned to sender at their expense If Stewart Audio is unable to contact the sender in 14 days the mer chandise will be considered scrap and may be disposed of 6 2 2 Shipment Instructions If Stewart Audio requests that you ship the defective product back to their service center please refer to the guide below To ensure prompt warranty service be sure to follow all instructions 1 Return Authorization
18. ide your own shipping pack the minimum recommend ed requirements for materials are as follows a 275 P S I burst test Double Wall carton that allows for 2 inch solid Styrofoam on all six sides of unit or 3 inches of plastic bubble wrap on all six sides of unit b Securely seal the package with an adequate carton sealing tape c Do use light boxes or peanuts NOTE Damage caused by poor packaging will not be covered under warranty 6 2 4 Estimate Approval An estimate for all non warranty repairs will be provided to the custom er once the unit has been shipped to the factory The customer is re sponsible to approve this estimate within 7 days If the repairs are not approved within 14 days Stewart Audio reserves the right to consider the unit scrap and may discard it 6 2 5 Payment of Non Warranty Repairs Payment for non warranty repairs must be submitted to Stewart Audio before the product will be returned to the customer 30 7 Accessories The following accessories are available from Stewart Audio for your amplifier Mounting Brackets RKM HLF S RKM HLF D Single rack mount kit for FLX Series amplifiers Dual rack mount kit for FLX Series amplifiers Connection Adapters ADPT RCA ADPT SUMRCA Stereo Female RCA to male 3 5mm terminal block ADPT SUM35 Stereo Female 3 5mm to male 3 5mm terminal Mono Female RCA to male 3 5mm terminal block block Wall Plates WP RVC B Wallplate with 10k pot
19. l network enabled FLX amplifiers are shipped from the factory with network input 1 routed to local output 1 via the in ternal DSP software mixer If the FLX model has more than one local output the corresponding network input is routed to the lo cal output with the same number designation This can be changed as desired via the DSP Control Center software 3 4 2 Dante FAQ Q am having problems installing or using the Dante Controller Soft ware A Please refer to the official documentation available in the Audinate portal where you downloaded the Controller Software Q I do not see the FLX Series amplifier showing up on the network A All Stewart Audio products are tagged as ADDRESS from the factory You can find a specific Ultimo device by choosing the device s MAC address from the list You can rename this using the 23 Dante Controller software routed an audio signal to network input 1 of the FLX amplifier using the Dante Control Center software but hear no output from the amplifi er A Check the settings in the FLX amplifier matrix mixer using the DSP Control Center software to be certain that network input 1 is routed to a local output 24 3 5 Remote Volume Control FLX Series amplifier volume can be remotely controlled or muted via the input on the rear of the amplifier In addition to the RS 232 connect or Section 3 3 3 an external potentiometer which can be located where
20. ly 8 Clean the amplifier with a clean damp cloth Do not use solvents or abra sive cleaners Never pour any liquid on the amplifier 9 When left unused for a long period of time the power cord should be unplugged form the outlet 10 Damaged Amplifiers requiring service should be repaired by a qualified service technician when The power cord or AC plug has been damaged Objects have fallen or liquid has spilled into the unit The amplifier has been exposed to rain or other moisture The amplifier does not appear to operate normally or exhibits a marked change in performance e The amplifier has been dropped or the enclosure damaged 11 The user should not attempt to service the amplifier beyond that de scribed in the operating instructions All other servicing should be referred to qualified service personnel Table of Contents Important Safety Instructions e 2 Table of Contents ee eee 4 1 Welcome o eee 5 1 1 Features eee 5 1 2 Using this Manual M 5 2 Setup eee 6 2 1 Setup Precautions e tee ee ee ee 6 2 2 Amplifier Installation HM 6 2 3 Proper Cooling Considerations 8 2 4 Input Connections eem e e 9 2 5 Output Connections Hee 12 2 6 Network nn 15 3 Operation e 16 3 1 Operation Precautions 16 3 2 Model 5 1
21. ontroller User Manual which should be read for complete configura tion instructions 3 4 1 Using Audinate s Dante Controller Software Once Dante Controller has been installed following the instructions in the Dante Controller Software User Manual www audinate com launch the application to see the connection matrix File Device Help GAS x o Master Clock FOH Console Routing Device Status Clock Status Events Gudinate Filter Transmitters Filter Receivers a E S amp E ri 5 x g 5 22 All network enabled FLX amplifiers are shipped from the factory with network input 1 routed to local output 1 via the internal DSP software mixer If the FLX model has more than one local output the corre sponding network input is routed to the local output with the same number designation This can be changed as desired via the DSP Con trol Center software All Stewart Audio products will ship from the factory with the name Ultimo MAC This can be renamed within the device con figuration in the Dante Controller software Transmitters are shown on the top of the matrix while Receivers are shown on the left hand side The FLX Series amplifiers include 4 trans mitter channels and 4 receive channels In order to make a connection click on the matrix node between the appropriate transmitter and re ceiver If a connection is successful it will display a green checkmark Note Al
22. t kit is straightforward Attach each of the right angle brackets by inserting the 2 screws through the bracket into the side of the FLX enclosure Two straight brackets are also pro vided for the rear of the amplifier The method of attaching these to the rack will depend on the type of rack you are using 2 2 2 Dual Rack mount Kit Part Number RKM HLF D Refer to the figure on the following page when assembling the dual rack mount brackets onto the FLX amplifier Step 1 Note the position of the captive nuts on the inner brackets One set must be near the front of one amplifier and the other set near the rear of one amplifier Step 2 Attach the right angle brackets to the front of each amplifier and the flat brackets to the rear of each amplifier Step 3 Attach inner brackets to each amplifier as oriented in step 1 the front of the pair of inner brackets and two screws to the rear pair of the inner brackets Step 4 Bring the two subassemblies together overlapping the flanges on the inner brackets Complete assembly by inserting two screws into the front of the pair of inner brackets and two screws to the rear pair of the inner brackets CAUTION Use only the screws provided in mounting brackets to the amplifier Do not over tighten 2 2 3 Product Dimensions 8 4in 21 2cm 9 5 1 7in 4 4cm STEWART POWER STANDBY 10 7in 27 2cm 1 7in 4 4cm 2 3 Proper Cooling Considerations
23. then the problem is in the output connection Check wiring and speakers for short circuits Problem No output on one or more channels Power indicator is lit Procedure Check that cross point mixer settings are correct Check that input and output connections are secure Problem Amplifier overheats and or shuts off Procedure Review Section 2 3 on proper cooling procedures Ensure input signal levels are 1 Vrms less Overdriving the amplifier for ex tended periods of time can cause a thermal shutdown Problem Output sound is distorted or cracking Procedure Check all cables for damage or loose connections and re duce the gain on the input signal at the mixer Replace the cables and loudspeakers temporarily to see if this resolves the problem If problem still exists contact your Authorized Dealer for service 26 5 Technical Specifications Power Output FLX80 4 FLX80 4 CV FLX160 2 CV FLX320 1 CV Frequency Response 0 3 dB THD N full output power Signal to Noise Ratio Input Sensitivity Input Impedance Balanced Unbalanced Phantom External Mute Power Consumption Idle 1 8 Draw Amplifier Class Remote Volume External Mute Input Connectors Output Connectors Dante Network Connector LED Indicators Controls Power Supply Cooling Construction Mounting Dimensions height width length Weight 80 40W x 4 4 8Q 80W x4 70 7V 100V 160W x 2 70 7V 100V 320W x 1 Qn 70 7V 100V
24. ver convenient can also control the output volume of all chan nels Remote muting is also useful for fire alarm situations in which all unnecessary sound must be silenced NOTE The remote volume control connector attenuates A the signal level from the level set by the DSP and RS 232 settings It cannot increase the signal level above those settings nor does it change those settings NOTE 2 The remote volume control is disabled when the A USB cable is connected to the device even if a connection has not been established between the DSP Control Center and the device Remove the USB connector to use the remote volume control In order to remotely control the volume of the unit a 10k ohm linear taper potentiometer should be placed between the 10V pin and the GND Ground pin on the rear of the unit with its wiper on the RVC pin The volume will be determined by the selected resistance on the po tentiometer the greater the resistance the louder the volume The amplifier can be remotely muted by making a connection between the GND pin and the MUTE pin No power should be applied to these pins simply a contact connection 10V 0 RVC GND MUTE 25 4 Troubleshooting Problem Power indicator does not turn on Procedure Check that the amplifier is plugged into a live outlet After you have ensured that it is not a power issue disconnect any speakers If the amplifier turns on after a few seconds delay
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