Nady Systems SPM42504 Music Mixer User Manual
Contents
1. AAN UJS LOSIC gt NADY SYSTEMS INC 6701 SHELLMOUND STREET EMERYVILLE CA 94608 Tel 510 652 2411 Fax 510 652 5075 www nady com2. pm Ne Ge FS EPs EK aap OWNER S MANUAL DIGITAL ECHO EFFECTS EFFECTS DISPLAY gt gt 48V POWER GRAPHIC EQUALIZER 63Hz 250Hz ELSE HEADPHONES OUTPUT RETURN 4250 stereo Powered Mixer SPM 1290 4 Channel Stereo Powered Mixer SPM 1290 4 Channel Stereo Powered Mixer N UIS LOSIC Congratulations on your choice of the NADY AUDIO SPM 4250 Stereo Powered Mixer you have purchased one of the finest stereo powered mixing units on the market today This unit was developed using the expertise of professional sound engineers and working musicians You will find that your new SPM 4250 has superior performance and greater flexibility than any other stereo powered mixer in its price range Please read this manual carefully to get the most out of your new unit Thanks for selecting NADY AUDIO as your choice in stereo powered mixers FEATURES e 4 Mono input channels with balanced XLR Mic and 1 4 unbalanced line inputs switchable 48V phantom power e Fan cooled bipolar amplifier 2 x 125W RMS 4 ohms 1 THD both channels driven Built in Echo Effects DSP emulates plate gate room hall stadium reverbs e Input controls connections and indicators include Channel Gain controls Peak LED s High Mid and Low EQ s Channel EFF Send Pan and Main Volume controls e 5 band master EQ Aux Send and Return Tape CD In and Record Out stereo RCA jacks with Tape level control e S
3. THE RISK OF FIRE OR RISK OF ELECTRIC SHOCK ELECTRIC SHOCK DO NOT EXPOSE THIS DO NOT OPEN PRODUCT TO RAIN OR MOISTURE DO NOT REMOVE CHASSIS OR BACK NO USER SERVICEABLE PARTS INSIDE IAD serine rae et aa INC REFER SERVICING TO QUALIFIED W TADE NCHNA SERVICE PERSONNEL SPEAKER OUTPUTS 2 x 125W RMS Ne 25 PHANTOM POWER ON OFF SWITCH When this switch is depressed 48V of phantom power will be supplied to the XLR mic inputs 26 SPEAKER OUTPUT JACKS The left and right 1 4 speaker outputs can deliver up to 125W RMS per side to 4Q loads 27 POWER CONNECTOR The IEC socket is used to connect the power cord to an AC power source Caution Do not remove the center grounding pin 28 FUSE COMPARTMENT Replace with only the same type fuse as listed in the SPECIFICATIONS If it blows continuously do not use the unit and have it serviced by qualified personnel 29 AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord check to see that the unit is set for the proper voltage for your area 115V 60Hz or 230V 50HZz CONNECTIONS This NADY AUDIO mixer uses 4 different types of audio connectors for the various input output connections 1 XLR balanced 2 1 4 TRS phone jacks for balanced unbalanced stereo or in out inserts 3 1 4 TS unbalanced 4 RCA pin unbalanced Figures 1 Balanced XLR input connections 2 Stereo headphone connection with 1 4 TRS plug 3 1 4 mono TRS plug used as unbal
4. VOLUME CONTROL This adjusts the channel signal level that is sent to the master section This control also adjusts the level of the signal sent to the AUX SEND 18 10 DIGITAL ECHO EFFECTS 1 2 E LL m E 1 7 13 pin s Mn GRAPHIC EQUALIZER 16 BEER 14 23 15 24 21 22 18 20 19 20 OUTPUT FRONT CONTROLS AND CONNECTIONS MASTER SECTION 10 POWER ON OFF SWITCH This switch turns the unit on and off The SPM 4250 uses relays to ensure quiet turn on and turn off 11 48V PHANTOM POWER LED Lights to indicate when 48V phantom power is turned on 12 ECHO EFFECTS DISPLAY This numeric Effects Display will indicate which of the 16 echo presets has been selected 13 ECHO TIME SELECT BUTTONS Use these UP and DOWN buttons to select one of 16 preset time intervals of the built in Echo Effects DSP Digital Sound Processor Setting 1 selects the shortest echo time to emulate plate and doubling effects whereas setting 16 enables the longest echo time for stadium reverbs and delay sounds Settings around 4 7 emulate room and hall reverbs by adjusting the ECHO DEPTH CONTROL 14 to approx ten o clock and the ECHO LEVEL CONTROL 15 to mid 14 ECHO DEPTH CONTROL This adjusts the number of repeats and feedback depth of the echo effect selected Turning the control clockwise sets the repeats to maximum for lengthy echoes or plate effects Turning the c
5. LIZER CONTROLS All input channels are fitted with a three band EQ HIGH MID and LOW All three bands have up to 15 dB of cut and boost with a center detent for OFF The frequency response is flat when all three EQ knobs are in the center detent position The HIGH and LOW shelving controls have their frequencies fixed at 12 KHz and 90Hz respectively The MID control has a peaking response at 2KHz The channel EQ is a valuable feature of the mixer as it allows the user to control the tonal characteristics of each channel separately For example boosting the LOW can fatten the FRONT CONTROLS AND CONNECTIONS sound add warmth to vocals or extra punch to bass drums and synths the MID control can be used to define the midrange or bring out the vocals and adjusting the HIGH control can provide a crisp sounding high end Another very important yet often overlooked technique is to use the EQ to subtract from the mix Cutting the HIGH control can reduce unwanted sibilance hiss cymbals or high frequency feedback while attenuating the MID or LOW can also eliminate feedback or clear up a muddy sounding mix Cutting the HIGH and LOW then pushing up the VOLUME CONTROL 9 is equivalent to mid range boost Note Always reset a channel s inout GAIN CONTROL 4 or external device s output level after altering the amount of equalization The key to successful equalization is to avoid excess Too much equalization on the input channel
6. POWER AMP SECTION POWER OUT SO BOTH CRANN EDS DRE N e aS 105W RMS per side ZO BOTRECHANNEES DRIVEN ereer une tour eR WEE tdv rSn TU Fue cudnadeustdedeadsatuieitedavedeiveasiietyaas 125W RMS per side FREQUENCY RESPONSE serice T Lr 10Hz 20KHz 3dB 5 GENERAL POWER sizes isimuz cet Eaa e Voltage selectable 115VAC 60Hz or 230VAC 50Hz FUSE XHEGDIREMEBNTS s rata aee atas ect eee ettet ttum nM o nU E M ELE 5A 250V FB 115VAC 2 5A 250V FB 230VAC WEIGERT waza T P 18 65 lbs 8 6 Kg DIMENSION S 53 0 Gia condi cree Pac tea itta dea fotu vue oup oce dedu Geist tan odes tener d eo dv ute 17 4 x 10 5 x 10 3 44 2 cm x 26 7 cm x 26 2 cm The specifications above are correct at the time of printing of this manual For improvement purposes all specifications for this unit including design and appearance are subject to change without prior notice 10 SERVICE FOR YOUR NADY AUDIO PRODUCT U S Should your NADY AUDIO product require service please contact the Nady Service Department via telephone at 510 652 2411 or e mail at service nady com International For service please contact the NADY AUDIO distributor in your country through the dealer from whom you purchased this product DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF AS IT CAN BE DANGEROUS AND WILL ALSO VOID THE WARRANTY
7. anced input output 4 1 4 stereo TRS plug used as balanced input output 5 RCA pin plug for unbalanced input output HEADPHONES Tip Left signal Ring Right signal Sleeve Ground Shield Tip Ring Sleeve Strain relief clamp RCA PIN PLUG Sleeve Ground Shield UNBALANCED USE OF MONO 1 4 PLUGS Sleeve Ground Shield Tip Sleeve Strain relief clamp Socket female MICROPHONE INPUTS Ground Screen Cold Out of Phase Signal Hot In Phase Signal 1 BALANCED USE OF STEREO 1 4 PLUGS Tip hot Ring cold Sleeve Ground Shield Sleeve Strain relief clamp SPECIFICATIONS 1 INPUT SECTION PK V4 TRS BALANCED 1 4 TS BALANCED 2 OUTPUT SECTION AUX SEND 1 4 UNBALANCED Pt TAPE OUT RCA JACKS v22dBV 3 MIXER SECTION FREQUENCY RESPONSE c PPP PT eave ace eased testcase ra een eee eee eal ees 30Hz 18KHz 3dB ils MT c e PR EA 0 1296 SIN RATIO erc T es 84dB NOIS E FEODOR eterna ne yet teeth NE ne SPEED Cte CL eco DUI c oput DES ee e eee euh ere eee 0 25mV PIGRE OQ EIS cert ne epee ee nox Et tun Mun Re If IS UTE Sotto tu OE Lp B cee ee eT 12KHz UB zie gau SLES eR ERE ET E DET I 2KHz LEOWIEOG AOIB renee SO cP nem SO DE UE mS DA Mx La M PREM en ee d pi M M ee 90Hz 4
8. gh temperature devices such as power amplifiers etc or the unit may overheat in operation Although the unit s chassis is shielded against radio frequency RF and electromagnetic interference EMI extremely high fields of RF and EMI should be avoided Please make sure that the power unit supplied is marked for the correct voltage in your area 120VAC 60 Hz or 230VAC 50 Hz Power requirements for electrical equipment differ from area to area In new installations and portable sound systems or any situation in which the AC power is in question it is wise to confirm the voltage and use the appropriate power supply unit before connecting it to power sources Europe except UK 230V 50Hz UK and Australia 240V 50Hz USA and Canada 120V 60 Hz For other areas please check with local authorities When ready to operate plug the AC cord into the power source Make sure that the unit is turned off before connecting to the AC power source to avoid possible loud transients which can damage your speakers or your ears Power up the unit as noted on page 8 FRONT CONTROLS AND CONNECTIONS 7 4 5 6 8 9 3 2 1 CHANNEL SECTION 1 MIC INPUT This electronically balanced XLR input is designed to accept signals from any balanced or unbalanced low impedance Low Z microphone The XLR jack is configured for Pin1 ground Pin2 positive Pin3 negative 2 LINE INPUT This 1 4 inp
9. ng the product Do not use this product near water e g near a bathtub washbowl kitchen sink in a wet basement or near a swimming pool etc This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling This product in combination with headphones or speakers may be capable of producing sound levels that could cause permanent hearing loss Do not operate for a long period of time at a high volume level or at a level that is uncomfortable If you experience any hearing loss or ringing in the ears you should consult an audiologist The product should be positioned so that proper ventilation is maintained The product should be located away from heat sources such as radiators heat vents or other devices including amplifiers that produce heat The product should be connected to a power supply only of the type described in the operating instructions or as marked on the product Replace the fuse only with one of the specified type size and correct rating The power supply cord should 1 be undamaged 2 never share an outlet or extension cord with other devices so that the outlet s or extension cord s power rating is exceeded and 3 never be left plugged into the outlet when not being used for a long period of time Care should be taken so that objects do not fall into and liquids are not spilled through the enclosure s openings The product should be serviced by qualified service per
10. ontrol counter clockwise sets one repeat for single delay or doubling effects 15 ECHO LEVEL CONTROL This adjusts the level of the effected signal sent to the master mix bus 16 5 BAND GRAPHIC EQ The 5 band graphic equalizer allows you to adjust the frequency response of the left and right master bus signal allowing final tonal adjustments This provides a maximum of 12dB cut or boost from the flat position for each frequency band 63Hz 250Hz 1KHz AKHz 12KHz The faders can be adjusted to easily eliminate feedback at the corresponding frequency These EQ s are pre MASTER VOLUME 17 LED OUTPUT METER The 5 stage stereo output LED meter display the can be used to maintain proper levels in the master mix The red PEAK LED will light when the output signal is just below clipping It is acceptable if the red LED lights occasionally If the red LED lights more than occasionally you should turn down the MASTER VOLUME 24 to avoid audible distortion and clipping which can cause damage to your speaker and even the internal amplifier 18 AUX SEND JACK The AUX SEND JACK provides a mono mixed signal output from each input channel to an external effects unit or other device The signal level is adjusted by the EFF and Volume controls of each channel 19 AUX RETURN This input can be used to return the effected signal into the SPM 4250 or it can be used as an auxiliary input for line level devices The input signal can be adjusted
11. s will result in a mix that is smeared together with nothing specifically defined During rehearsals experiment with the equalizer controls on various instruments vocals and combinations of these mixed together to become familiar with various equalizer settings 6 PFL CONTROL The PFL pre fader listen control adjusts the volume of the mono signal sent to the HEADPHONES 22 provided the master section PFL SWITCH 23 is enabled The signal is post EQ 5 and independent of the channel VOLUME 9 or EFFECTS 7 Adjusting the PFL never affects the AUX SEND 18 RECORD OUT 20 or SPEAKER OUTPUTS 26 This is useful if the person operating the SPM 4250 wants to listen to one or more of the input signals especially to troubleshoot problems without affecting the main mix The PFL controls can also be used to set a sub mix which can be output from the HEADPHONES jack and sent to an external recording device mixing board or power amplifier 7 EFFECT CONTROL The EFFECT control adjusts the signal level sent by each channel to the internal ECHO EFFECTS DSP Digital Sound Processor The EFFECT controls are mono and post Channel EQ and post Volume The signal level sent to the EFF bus will be affected by the channel Volume setting but not the PAN control This control also adjusts the level of the signal sent to the AUX SEND 18 8 PAN CONTROL The PAN positions the output of the channel in the stereo field of the Master output 9
12. sonnel if A The power supply cord or the plug has been damaged B Objects have fallen into or liquid has been spilled onto the product C The product has been exposed to rain D The product does not appear to operate normally or exhibits a marked change in performance E The product has been dropped or the enclosure damaged Do not attempt to service the product beyond what is described in the user maintenance instructions All other servicing should be referred to qualified service personnel INSTALLATION To ensure years of enjoyment from your NADY AUDIO SPM 4250 powered mixer please read and understand this manual thoroughly before using the unit 1 INSPECTION Your NADY AUDIO SPM 4250 was carefully packed at the factory in packaging designed to protect the units in shipment Before installing and using your unit carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit Please note Nady Systems is not responsible for shipping damage If your unit is damaged do not return to Nady but notify your dealer and the shipping company if shipped to you immediately to make a claim Such claims must be made by the consignee in a timely manner 2 SETUP AND OPERATION Parts of the unit can become very warm during use This is normal during operation Care should be taken to ensure that there is enough space around the unit for cooling Also do not place the SPM 4250 on hi
13. tereo headphone output with separate volume adjust e Internal shielded AC supply with 115V 60Hz 230V 50Hz select switch TABLE OF CONTENTS FEATURBES cnet i teet t bcne do en 2 WARNING tette a feat OEnUIen ase INSTALLATION occccccscsccsecccecececesescssecscscsceceverecessecscsceveveveusesessenens 4 Dealers Name FRONT PANEL CONTROLS amp CONNECTIONS 5 City REAR PANEL CONTROLS amp CONNECTIONS 8 State Zip CONNECTION eerte tete teer rel OS SA eee SPECIFICATIONS eerte 10 Serial MOTEGUE sn e eee RE 11 An equilateral triangle enclosing a lightening flash arrowhead symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure which may be of sufficient magnitude to constitute a risk of electric shock CAUTION DO NOT OPEN ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR 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 An equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit IMPORTANT SAFETY INSTRUCTIONS When using this electronic device basic precautions should always be taken including the following 1 2 10 11 Read all instructions before usi
14. using the MASTER VOLUME 24 and the output volume of the external unit 20 TAPE INPUT REC OUTPUT JACKS The Left and Right TAPE INPUT RCA jacks allow cassette recorders CD players or MP3 players to be added to the master mix output These signals are affected by the TAPE LEVEL 21 MASTER VOLUME 24 and 5 BAND EQ 16 The RECORD OUTPUT Left and Right RCA jacks provides signal output to recording devices home audio equipment or external amplifiers These outputs are post MASTER VOLUME and 5 BAND EQ 21 TAPE LEVEL This adjusts the amount of TAPE IN signal that is sent to the master bus 22 HEADPHONES CONROL AND JACK This control and corresponding 1 4 output is for connecting headphones to the SPM 4250 to monitor each channel or the master mix dependant on the MASTER PFL 23 setting 23 MASTER PFL SWITCH When this push button switch is out the HEADPHONES receive the main mix signal post 5 BAND EQ pre MASTER VOLUME When the button is depressed the signal is sent from each channel PFL control to the HEADPHONES In this setting the HEADPHONES jack can also be used as a sub mix output 24 MASTER VOLUME The MASTER VOLUME sets the level of the stereo signal sent to the internal power amplifiers REAR CONTROLS AND CONNECTIONS 25 m E f ananta Power 115V 7 EEx 230V 29 m ES AC POWER EG 27 FUSE i 4 115VAC ON 4 5A 250V FB ert 45 230VAC 2 5A 250V FB WARNING CAUTION TO REDUCE
15. ut is designed to accept balanced or unbalanced line level signals such as those from keyboards drum machines or samplers If a balanced signal is to be connected to the line input then a 1 4 TRS stereo phone plug should be wired for Tip positive Ring negative Sleeve ground Note Only the Mic or the Line input of a given channel should be connected at one time Do not connect both at the same time 3 PEAK LED INDICATOR The PEAK LED illuminates when a channel input is overloading It detects the peak level after the EQUALIZER CONTROLS 5 and will light just before clipping to warn that the signal is approaching overload You do not want the Peak LED to light except very intermittently If it lights persistently reduce the GAIN CONTROL 4 4 GAIN CONTROL The GAIN control adjusts the input sensitivity of the mic and line inputs on each channel This control can be adjusted to accommodate input signals from a wide variety of sources from the high outputs of keyboards or drum machines to the small signal outputs of microphones The best balance of S N and dynamic range will be achieved if you adjust the GAIN control on each channel separately so that the maximum signal level can be input without distortion While speaking singing or playing an instrument at maximum performance level increase the GAIN control until the PEAK LED 3 flashes then turn down the GAIN control until the flashing stops 5 EQUA
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