QSC SRA 3622 User's Manual
Contents
1. is left unconnected J The other end of the cable is connected to a pair of switch le NO URS UY om o or relay contacts These contacts are typically inside the main AC power controlling device processor When the switch or relay contacts are Ole ASAS o closed the amplifier will turn off When the switch or relay contacts are opened the amplifier will turn on To additional contact closure remote trigger inputs Another possible remote on off solution is shown to the right This solution uses a switch wired to the stereo mini plug The switch could be replaced with a set of relay contacts should your applica tion require it Connect contacts to sleeve and ring of stereo mini plug Tip connection not used to remote trigger in off position anytime the system will not be operated for an extended period This prevents the remote trigger from accidentally powering up the amplifier while you are away It is a good idea to do the same with all remote turn o2. 20 Hz to 20 kHz 0 2 dB 8 Hz to 50 kHz 0 3 dB gt 500 107 dB SRA2422 425 725 1200 1550 2400 2 tier class H lt 0 02 lt 0 02 lt 0 01 2 12V 1 92V 5 0 amps at 8 ohms ch 20V uS SRA3622 725 1100 1800 2400 3600 2 tier class H lt 0 02 lt 0 02 lt 0 01 2 71V 2 38V 8 0 amps at 8 ohms ch 20V uS SPECIFICATIONS SRA Series ALL MODELS Voltage gain Controls Connectors Input impedance Indicators Cooling Amplifier Protection Load protection Dimensions Weight Available Finish 28x 29 dB Front Rear Input Output Remote DataPort XLR RCA Clip Signal 30 dB Power Width Height Depth AC switch Recessed Ch 1 and Ch 2 gain knobs DIP switch Ch 1 clip limiter on off LF filter on off LF filter freq select 20 or 50 Hz Ch 2 clip limiter on off LF filter on off LF filter freq select 20 or 50 Hz inputs parallel or stereo bridge mode gold plated RCA 3 pin XLR 1 each per channel Neutrik Speakon 1 per channel and safety shrouded binding posts two 3 5 mm jacks in parallel 12V or switch remote on off trigger HD 15 for QSC DSP accessory 10k ohms unbalanced 20k ohms balanced 10k ohms unbalanced red LED 1 per channel green LED 1 per channel green LED ultra quiet variable speed fan rear to front air flow Full short circuit open circuit thermal ultrasonic
3. Low Frequency Filters Unless you already have filtering in the signal path preceding the amplifier use the low frequency filter to protect your speakers from cone overexcursion caused by frequencies below the speaker s limits The speaker s documentation will specify the low frequency limit HA 50 Hz Generally match the frequency selection to your speaker s low frequency capability This improves ET speaker performance by limiting subaudio cone move ment making more power available for the speaker s rated frequency range Each channel has its own low frequency filter Channel CH 1 MODE SWITCHES 2 FILTER ON 3 20 Hz FILTER K 8 20 Hz FILTER 9 FILTER ON MODE SWITCHES CH 2 1 s low frequency filter is operated by switches 2 and 3 Channel 1 s low frequency filter is operated by Channel 2 s filter is operated by switches 8 and 9 switches 2 and 3 Channel 25 filter is operated by switches 8 and 9 FILTER ON To turn the filter on slide the switch to the right Sw 2 Ch 1 Sw 9 Ch 2 FILTER OFF To turn the filter off slide the appropriate switch to the left 20 HERTZ To set the filter for a 20 Hz rolloff slide the switch to the right Sw 3 Ch 1 Sw 8 Ch 2 50 HERTZ To set the filter for a 50 Hz rolloff slide the appropriate switch to the left selection to be active If the on off switch is set to the off position no filtering will NOTE The filter on off switch must be se
4. This warranty does not extend to any product which has been subjected to misuse neglect accident improper installation or where the date code has been removed or defaced QSC shall not be liable for incidental and or consequential damages This warranty gives you specific legal rights This limited warranty is freely transferable during the term of the warranty period Customer may have additional rights which vary from state to state In the event that this product was manufactured for export and sale outside of the United States or its territories then this limited warranty shall not apply Removal of the serial number on this product or purchase of this product from an unauthorized dealer will void this limited warranty Periodically this warranty is updated To obtain the most recent version of OSC s warranty statement please visit www qscaudio com Contact us at 800 854 4079 or visit our website at www gscaudio com HOW TO CONTACT OSC AUDIO PRODUCTS Mailing Address OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa CA 92626 1468 USA D Telephone Numbers Main Number 714 754 6175 NS Sales 714 957 7100 Sales amp Marketing 800 854 4079 toll free in U S A only Technical Services Group 714 957 7150 800 772 2834 toll free in U S A only Facsimile Numbers Sales amp Marketing FAX 714 754 6174 Technical Services Group FAX 714 754 6173 O World Wide Web www gsc
5. l IOK UNALANCED tt cur I J i E Ps rs reas veas PAR i al K w neo thurs ooo tele CH 2 IPEDANCE 20 BALANCED MODE SWITCHES re ae Ht gt CH1 E E E E SK Emma Cc EA E ss i Tere TAGER NE lt A E o 4 SM oe ke Et Es Es CH2 s ODE SWITCHES sa CH2 El OR l WILI a EEE 1 A 041 E E E E onc E e E EE ae 143 eS es a mes O E E E E arias C2 ES o rs a E a CH2 21 22 Look for Connecting the Outputs to the Loudspeakers There are two basic speaker connection configurations for the SRA amplifier Stereo and parallel modes use two separate output connections two loudspeaker loads Bridge mode uses one output connection one loud speaker load Use either the binding post or the Speakon output connectors Each connector type is detailed in the following sections Refer to the
6. p ugg Y Y H m SJ Binding post outputs on the rear panel WARNING Use A proper speaker wire Stereo or Parallel Mode Use NEC Class 2 wiring Bridge Mode Use NEC Class 1 wiring Refer to local and national electrical codes to assure code compliance 129 mm maximum 0 51 maximum 23 CONNECTIONS Outputs Binding Posts Stereo and Parallel Mode output connections using binding posts Connect each set of binding post outputs to Its respective loudspeaker Z 2 ohms minimum Maintain proper polarity when hooking up loudspeak ers Connect each red binding post or positive to the red or positive terminal of each loudspeaker Connect each black binding post or negative to the black or negative terminal of each loudspeaker All amplifiers and loudspeakers must maintain proper connection polarity in order for bass response to be optimum ao h LO oJ RO im y Lar fa Bridge Mode output connec tions using binding posts Z 4 ohms minimum Em oo oh Connect channel 1 s red binding post positive to the loudspeaker s red or ods positive terminal Connect channel 2 s red binding post positive to the loudspeaker s black or negative terminal If operating other amplifiers in bridge mode make sure the connection polarity is maintained JO Le JE RO mt y o D
7. The SRA amplifier is highly durable and carefully packaged We recommend you inspect the unit carefully after removing it from the packaging as occasionally there may be damage due to some unfortunate incident during shipment Report any damage to the shipping carrier We recommend saving the carton and packing material in case the unit must be shipped back to your dealer distributor or service center Also note some freight companies consider damage claims without the original packing materials invalid The OSC shipping box should contain 1 The SRA amplifier 2 This Owner s Manual 3 Accessory packet containing rack mount ears 2 used for rack mount installation only four adhesive feet for non rack mounting installation 5 64 hex key Allen wrench for gain control security cover removal remote on off trigger control cable 36 long 4 IEC Power Cord SETUP Stand alone Mounting If the amplifier is to be used stand alone not mounted in an equipment rack install the self adhesive rubber feet on its bottom surface The self adhesive rubber feet are included with the amplifier To install the self adhesive rubber feet 1 Turn the amplifier upside down on a soft nonabrasive surface 2 Peel the backing paper off of each rubber foot and place near each of the four corners of the chassis bottom 3 Press firmly to activate the pressure sensitive adhesive 4 Turn the amplifier back over so that the rubber
8. and RF protection Stable into reactive or mismatched loads on off muting DC fault power supply shutdown 483 mm 19 0 with rack mount ears installed 445 mm 17 5 without rack mount ears 89 mm 3 5 2 rack units 394 mm 15 5 overall 381 mm 15 0 from front of rack rail to tip of rear support chassis tab 10 kg 22 Ib net black chassis with black front panel inserts or black chassis with silver front panel inserts Specifications subject to change without notice 37 38 WARRANTY INFORMATION amp HOW TO CONTACT OSC WARRANTY USA only other countries see your dealer or distributor Disclaimer OSC Audio Products Inc is not liable for any damage to speakers or any other equipment that is caused by negligence or improper installation and or use of this amplifier product QSC Audio Products 3 Year Limited Warranty QSC Audio Products Inc QSC guarantees its products to be free from defective material and or work manship for a period of three 3 years from date of sale and will replace defective parts and repair mal functioning products under this warranty when the defect occurs under normal installation and use provided the unit is returned to our factory or one of our authorized service stations via pre paid transporta tion with a copy of proof of purchase i e sales receipt This warranty provides that the examination of the return product must indicate in our judgment a manufacturing defect
9. and off normally the problem is with the cables or equipment that was connected to the Remote Trigger jacks Signal LED s not responding to input signal level not lighting e f the green Power indicator LED is lit but the signal LEDs do not light up at all check the input Make sure the signal source is working and try another input cable Connect the source to another channel or amplifier and verify that it is working properly Connect a known good signal source to the amplifier to verify the amplifier is working properly e If you are using the XLR or RCA jacks be sure the connectors are fully inserted at both ends of all interconnecting cables e f using the DataPort inputs make sure connections are tight and that the software configuration in the upstream device if applicable is not muting the signal Signal LEDs responding to signal level but no output e f the green signal LED indicators are lighting normally the fault is somewhere between the amp and the speakers Check the speaker wiring for proper connection at each end and for any damage or breaks Try another speaker and cable If your system has multiple speakers connected in series any one speaker failure will cause all other speakers in the same series circuit to lose their signal Clip LED flashing but no output e f the red Clip indicator flashes when signal is applied the amplifier output may be shorted Disconnect the speaker cables from the amplifier If t
10. connections shown are simplified so as to convey the signal routing scheme All amplifiers shown are operated in stereo mode Amplifier inputs can be via the RCA or XLR connectors Amplifier outputs can be via the binding posts or the Speakon connectors Each application installa tion is different refer to you professional audio installer for detailed application solutions Processor SRA Amplifier Left Surround and Right Surround Channels SRA Amplifier Left Back Surround and Right Back Surround Channels Note Loudspeaker orientaion is for Left Front Subwoofer Right Front ilustration only Abbreviations and terms may vary by h manufacturer Center dA Left Surround Right Surround E Left Rear Surround Right Rear Surround Y TROUBLESHOOTING The amplifier won t turn on when the Power switch is operated green Power LED not illuminating e Verify AC power source is providing required voltage The simplest test is to plug a known working lamp into the same outlet and verify it works Properly functioning AC power is required in order to operate the amplifier e Check each end of the amplifier s power cord The AC plug or IEC type connector needs to be properly inserted Inspect the cord for damage If any damage is found replace the cord immediately e Unplug any device connected to the amplifiers Remote Trigger jacks If the amplifier now turns on
11. evenly Otherwise hazardous conditions 1 When installing equipment into a rack distribute may be created by an uneven weight distribution Dimensions for rack mount installations N S ae Note Some dimensions are taken from the front surface of the rack rail 354mm 443 mm 13 94 17 44 A ai E S Pa ZA LZ 2 2 S QI S amp S E O B ig 394 mm gt 15 50 o le 379 mm gt gt ye He ed e O O 95x127 mm 037 x 0 50 slot 76 IN tie 2 025x050 W O 6 with full radi O ea e 89 mm 2 H sal 3 50 ji 370 mm i 14 57 lt 381 mm gt 15 00 SETUP Supporting the rear of the amplifier Supporting the rear of the amplifier If transporting the amplifier in a loaded equipment rack support the rear of the amplifier using rear rack ears They are optional and not included with the amplifier OSC s Technical Services Group has the rear rack ear kits for sale The rear ear kit mounts two ways shown below using machine screws to secure the amplifier to the rear ears using a post and the notch to support the rear Refer to the instructions that come with the optional rear rack ear kit Information is for reference only Method 1 The amplifier is first installed and secured to the front rack rails The rear ears are then secured to the amplifier and to the rails using screws Pack tall Method 2 The post is installed on the rea
12. feet rest on the supporting surface SETUP Stand alone mounting cont d Dimensions shown are useful for non rack mount installations Rack Mounting Rack mounting the amplifier Rack mounting is optional The amplifier fits a 483 mm 19 width equipment rack To rack mount the amplifier 1 Install the rack mount ears see below and the following page for details 2 Position the amplifier in the equipment rack and secure all four corners of the front panel using machine screws and washers The size and thread type of the screws is determined by the equip ment rack Washers should be large enough to prevent the screw head from slipping into the rack ear mounting hole Plastic washers will help prevent the screws from scratching the front panel To attach the rack mounting ears you will need 1 A 2 size cross point Phillips screwdriver 2 The rack mount ears included with you SRA amplifier Continued top of next page SETUP Rack Mounting Continued from previous page Attaching the rack mount ears 1 Remove the two screws holding the front panel end cap in place Use a 2 cross point screwdriver Phillips 2 Place the rack mount ear as shown aligning it so the screws will go back into their original locations 3 Insert the screws and tighten being sure to keep the rack mount ear properly aligned 4 Repeat procedure for the other side the units
13. hot conditions be sure not to exceed the cable s maximum rated operating temperature e quality copper This is hard to judge it s best to use name brand cable you trust Cables made of recycled copper of unspecified resistivity have some risk When in doubt measure the resistance of a known length of cable and compare to standard wire table data Whether or not the copper has small amounts of oxygen is of little impact NOTE AWG is the abbreviation for American Wire Gauge The A smaller the gauge number the larger the physical size of the wire Example 10 AWG is a bigger thicker wire than 16 AWG CONNECTIONS Outputs Binding Posts Using the Binding Posts The binding posts support several connection methods banana plugs spade lugs or direct wire connection European models do not support the use of banana plugs If using banana plugs plug into the binding post directly If using spade lugs refer to the diagram below for acceptable dimensions of lug If connecting the cable directly strip about 1 2 inch of insulation from the ends and neatly twist any loose strands Loosen the retaining nut fully insert the wire and tighten Do not overtighten Maximum wire gauge is 10 AWG 2 58 mm diameter Continued following page gt 13mm a 1 2 2 58 mm max diameter 10 AWG maximum 19 mm 3 4 6 3 mm minimum European models do not 0 25 minimum have banana plug feature a e
14. lockoutable gain controls plus signal and clip LED indicators to monitor performance SRA Series amplifiers can be configured for stereo parallel or bridge mono operation As expected from the world s largest manufacturer of professional power amps with an unparalleled reputation for reliability and customer support the SRA Series amplifiers deliver performance you can count on SRA Features e Active inrush limiting will not trip circuit breakers at turn on e A hum free noise floor and ultra low distortion e Optional DSP modules for the ultimate in custom applications e Short circuit DC subsonic and thermal overload protection e Gain control security cover prevents misadjustments e LED indicators for power signal and clip e Detachable rack ears included e Only 10 kg 22 lb for easy racking and shipping e Selectable subsonic filters off 20 Hz or 50 Hz INTRODUCTION Illustrations CHANNEL 1 CHANNEL 2 eu at 1 Bt DN TT A De SFT SO gg 28 POWER 0 SRA 3622 STUDIO REFERENCE AMPLIFIER 3 5 Front Panel gain control security cover removed 1 Power switch 4 Channel 1 signal and clip indicators 2 Channel 1 gain control 5 Channel 2 gain control 3 Power on indicator 6 Channel 2 signal and clip indicators gain 29 dB and with gain control security cover installed See page 1 Note Amplifiers are shipped
15. one input to CH1 and the other to CH2 Use the XLR or RCA connectors e Output connections using the binding posts or the Speakon connectors connect CH1 and CH2 outputs to their respective speakers CH 1 MODE SWITCHES 4a PARALLEL J XLR 6 INPUTS 7 BRIDGE ON MODE SWITCHES CH2 Stereo Mode mode switches 4 5 6 and 7 to the left Biamp Applications Use Stereo Mode Mode switch settings for biamp are the same as for stereo Multi amp applications like biamp split the signal into different ranges before amplification dedicating each channel to a specific task The signal processing takes place externally before the signal is amplified A Biamp Notes e Switch settings are the same as for stereo mode see top of page e Audio inputs to amp must be preprocessed e Input connections connect one input to CH1 and the other to CH2 Use the XLR or RCA connectors e Output connections binding posts or Speakon connectors connect CH1 and CH2 outputs to their A Full range utput respective speakers CH1 input signal Low frequency Speakon can output both to processor processor output j j feeds CH LF channels if 4 wire cable is loudspeaker used Signal processor Mode switches configured as crossover set for stereo f e Verify all signal routing High frequency and test your configuration processor output feeds CH2 E HF at low power to avoid XLR or RCA Output ur damaging spea
16. ASE SRA 1222 SRA 2422 SRA 3622 Studio Reference Amplifier User Manual SRA 1222 SRA 2422 SRA3622 TD 000107 00 rev A IMPORTANT SAFETY INSTRUCTIONS amp EXPLANATION OF SYMBOLS 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 a dry cloth 7 Do not block any ventilation openings Install in accordance with OSC Audio Product 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 blade wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong is provided for your safety If the provided plug does not fit your outlet consult an electrician for the 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
17. ON CHI BRIDGE MONO MODE CONNECTION USE CH1 GAIN CONTROL HAMP 350 MA 2 The serial number plate is affixed to the rear panel bottom right corner adjacent the AC cord entry Typical AC Line Current Consumption SRA1222 SRA2422 SRA3622 5 0 amps at 8 ohms 8 0 amps at 8 ohms 5 6 amps at 4 ohms Conditions 120 VAC line both channels driven with pink noise at 1 8 rated power Plug the IEC style end of the cord into the amplifier Plug the AC mains end of the cord into the AC outlet IEC Inlet amplifier end of cord Orient the IEC style connector correctly with the inlet then insert the plug fully 120 Volt Models 15 Amp Receptacle Insert the plug fully 240 Volt Models European three conductor Earthing Receptacle Insert the plug fully 13 SETUP Operating Mode Selection Mode Switches The mode switches are located on the rear panel The switches are recessed to prevent accidental CH 1 changes It is best to set the switches as re MODE SWITCHES quired before mounting the amplifier in an 1 CLIPLIMITER ON equipment rack as they may become difficult to HA soi Sr ana HH access A PARALLEL ota a Change switch positions by sliding the switch BRIDGE MONO OFF L 7 BRIDGE ON left or right Operate the switches with a small 50 Hz 8 20 Hz FILTER A i imi 9 FILTER ON flat tip screwdr
18. ance servicing instructions in this manual CAUTION To reduce the risk of electric shock do not CAUTION remove the cover No user serviceable parts inside Re RISK OF ELECTRIC SHOCK fer servicing to qualified service personnel DO NOT OPEN WARNING To prevent fire or electric shock do not ex pose this equipment to rain or moisture Your SRA amplifier has a serial number located on the rear panel near the AC cord entry It looks like the example at right Please write the serial number OQS san down and keep for your records Retain your sales receipt it is your proof of wena purchase MODEL SRA1222 Model SRA OUTPUT PWR PER CH IMP 350 W 4 0 Serial Number 120V 5 6A 50 60 Hz SERIAL 000000000 Puchesal Fon L DELI Pat 5767744 Copyright 2002 QSC Audio Products Inc QSC is a registered trademark of QSC Audio Products Inc OSC and the QSC logo are registered with the U S Patent and Trademark Office Speakon is a registered trademark of Neutrik Inc Lakewood NJ TABLE OF CONTENTS INTRODUCTION General OVEIWVIEWissersla altri ds 4 PIS EIS tio MS AN od 5 UNPACKING Unpacking and IMS pEctiOn Sisiinsiky se asini enian 6 What ISsINGlUdEd doe ctv IS lada 6 SETUP Stand alone MOUNTING escus enneunen ei aa 6 Rack MOUNTING SSi e e A Seatuned a dalcsstcuncdsdedde 7 Supporting the Rear of the Amplifier 9 Gain Control Security COVBT ooooocooniocionccnconionononnonnonnoncnnnon
19. audio com E mail info gscaudio com service qscaudio com OSCE ASC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa California 92626 USA QSC and the QSC logo are registered with the U S Patent and Trademark Office 2002 QSC Audio Products Inc
20. best results from your purchase we encourage you to carefully review this manual With information including connections configuration and operation it offers many useful guidelines Building upon OSC s widely recognized reputation throughout the cinema industry as The Power Behind the Pictures the SRA Series of power amplifiers bring world class audio performance to recording studios high end home theaters and numerous additional applications This SRA Series manual encompasses three models the SRA1222 SRA2422 and the SRA3622 with power points ranging from 200 to 750 watts per channel 8 ohms These amplifiers draw upon OSC s expertise in high frequency switching power supplies and include the popular DataPort for integration with optional QSC crossover and DSP modules The SRAs exemplary performance is a result of OSC s high current output section and advanced HF switch mode power supply technology that enables these amplifiers to weigh considerably less than conventional transformer driven models while also occupying less rack space This patented technology delivers crystal clear highs smooth and accurate mids and a powerful articulate low end response providing realism to your audio playback Further a full complement of connectors facilitates easy integration into virtually any environment 0SC s SRA Series amplifiers also boast useful features such as individually selectable clip limiters and subsonic filters front mounted
21. d connection infor mation Atypical DataPort application shown with a program mable QSC DSP 4 signal processor The PC is required only for programming the DSP 4 and is not required to remain connected 31 32 USE Front Panel Controls and Indicators AC Power Switch On the front panel left side is the Power switch The switch is labeled ON above it and to the left To turn the power on Press in on the upper portion of the rocker switch The amplifier will go through its power up cycle the red colored Clip LEDs will illuminate briefly then the green colored Power LED will remain on To turn the power off Press in on the bottom portion of the rocker switch It may take a few moments for the Power LED to extinguish This is normal If the Power LED fails to illuminate when the power is switched on check the power cord for proper connection at both ends and verify the AC power source is functioning properly CHANNEL 1 CHANNEL 2 19 19 17 1 24 17 21 155 4 23 158 423 11 25 11 25 5 27 5 27 1 x Y g 29 p 29 Gain Controls A gain control adjustment is provided for each channel The voltage gain of the amplifier in dB is marked around each control Rotating the control clockwise increases the gain applied to the signal Rotating the control counter clockwise reduces the gain applied to the signal In stereo and parallel operating modes see pages 14 through 16 each chann
22. diagrams provided for speaker connection Mode descriptions stereo paral lel bridge or biamp and using the mode switches is shown on pages 14 through 17 Selecting Speaker Cable Use the highest quality loudspeaker cable available which may or may not be the most expensive A A CONNECTIONS Outputs Selecting Speaker Cable Connecting to Loudspeakers Do not use less than 4 ohm loads in Bridge mode Note polarity of connec tions for Bridge mode WARNING Use proper speaker wire Stereo or Parallel Mode Use NEC Class 2 wiring Bridge Mode Use NEC Class 1 wiring Refer to local and national electrical codes to assure code compliance e large conductor size 10 AWG is the largest that will fit the binding posts Smaller wire sizes like 12 or 14 AWG may be fine for shorter speaker cable use Avoid small sizes like 16 and up e the conductors to be stranded The higher the strand count the more flexible and long lived the cable will be This means less stress on the output connectors of your amplifier and higher reliability Solid wire is not recommended it stresses the connectors and will fail when flexed e quality insulation The insulation should be thick enough to protect the conductors wherever they are installed and be flexible enough that handling the cable is not difficult If operating in extreme cold temperatures be sure your cable insulation will still be flexible If operating in extreme
23. el power switch must remain in the ON position when using the remote trigger feature The amplifier s power status is controlled from the remote trigger connections If no plug is inserted in the remote trigger jacks amplifier on off is controlled by the front panel power switch If a mono plug is inserted into either jack the amplifier will go into standby mode off Apply 12 Volts DC to the tip and ground or negative to the sleeve and the amplifier will be enabled on Be sure to use a mono plug for 12 Volts DC remote trigger operation If a stereo plug is inserted into either jack and no connections are made between the tip ring and sleeve the amplifier will be enabled on If a contact connection switch or relay contacts is made between the sleeve and the ring the amplifier will go into standby mode off The tip connection is not utilized when contact closure method is used REMOTE TRIGGER USING 12 VOLT DC METHOD FOR STANDBY SD INSTALL 3 5MM TIP SLEEVE TO ENABLE AMPLIFIER APPLY 12V DC MIN ems e REMOTE TRIGGER USING 3 5 MMTRS CONTACT CLOSURE FOR STANDBY MANE ral gt CONNECT RING AND SLEEVE TOENABLE MUNI mk ko OPEN CONTACT Remote Trigger Method Type of Plug Power On enable Power Off standby Sleeve Tip 12 Volts DC Contact Closure Ring Tip Sleeve stereo Contacts Open mono 7 12 Volts De 0 Volts DC Contacts Closed CONNECTIONS Remote on off remote trig
24. el s gain is adjusted by its own control In bridge mode use channel 1 s gain control and set channel 2 s control fully counterclockwise OQ cor scn 2 1 Signal and Clip LED Indicators SIGNAL illuminates when the input signal strength is sufficient to drive the output above 30 dB relative to full output CLIP Illuminates when the input signal strength is strong enough to drive the output to the limits of the power supply i e clipping Clip Indicator Tips e Normally the clip LEDs will flash occasionally when the amplifier is driven hard high output level e f Illuminated most of the time the amplifier is being driven extremely hard and may eventually overheat triggering the thermal shutdown circuitry e f fully illuminated the amplifier is in thermal shut down or short circuit cutback is engaged Reduce the input signal strength if the Clip LED turns off there is a problem with the speaker s wiring or one of the speakers If the LED remains on when input signal strength is fully reduced the amp is in thermal shutdown Reduce gain settings or input signal and allow the amp to cool down Leave the power on so that the fan continues to run operation will automatically resume after the amplifier has cooled sufficiently APPLICATION EXAMPLE 7 1 Surround 7 1 Surround Application The block diagram at right shows how SRA amplifiers might be connected ina 7 1 home theater applica tion The
25. ger 12 VDC Type 12 VDC Remote Trigger Output Connect to SRA amplifiers using mono mini plug tip positive 12 Volt DC Remote Trigger For 12 Volt DC remote trigger operation use a mono 2 terminal 3 5 mm mini plug Do not use a stereo 3 termi nal plug Processor or other master turn on device with 12 VDC remote trigger output Connect a suitable two conductor cable to the plug Connect the tip of the plug to the or positive polarity wire and the sleeve to the or negative polarity wire Turn the amplifier on enable by applying 12 Volts DC to the cable Make certain that the polarity of the 12 Volts DC connects to the tip of the plug Turn the amplifier off standby ur iis ORE by removing the voltage This To additional 12VDC is normally done by turning off remote trigger inputs the main AC power switch of the processor or other AC DC adapter
26. he clip indicator no longer illuminates the problem is in the speaker cable or the speaker e Connect the speaker cables to the amplifier but not the speakers Make certain the conductors cannot touch at the uncon nected speaker end of the cables If the Clip indicator no longer illuminates the problem is most likely in the speaker e Check that the speaker cable connections are tight and properly terminated at each end Check the speaker cables for stray strands or breaks in the insulation Trim off all loose strands of wire and insulate any exposed wire with electrical tape All connections should be made with great care and all wire terminations should be carefully checked to ensure quality workmanship The Clip LEDs are fully illuminated e The amplifier is in Thermal Protection mode Let the amplifier cool down Leave the Power on so the fan will cool the amplifier Check for proper ventilation If the fan isn t running at all the amplifier requires servicing e f normal operation does not resume after letting amplifier cool down the amplifier requires service The amplifier cuts out when really crank it up intermittent operation e Make sure the AC power source is rated for the required current Avoid using extension cords If required use only the shortest possible 10 gauge heavy duty extension cords e f the AC power source is sagging or drooping under heavy load the circuit is overloaded or has other fundamental
27. hing This could be caused by a faulty speaker or loose connection Check the wiring and try another speaker If not the speaker or connections see next item to test for signal source distortion e The signal source may be clipping Keep the amplifier gain controls at least halfway 19 dB or so up so that the source does not have to be overdriven Reduce signal levels upstream of the amplifier to identify overdrive source There seems to be a lot of hiss noise on the outputs e Unplug the input cables to the amplifier If the hiss goes away then the problem is with the equipment or cables leading to the amplifier e f the hiss is present with no audio input cables connected check that the AC line cord is properly grounded at its connection to the line If the ground connection is OK and the hiss continues with no input cables connected then the amplifier requires servicing e To keep the normal noise floor low operate the primary signal source at full level without clipping and avoid boosting the signal further between the source and the amplifier The output has a hum noise e Use a common AC ground connection for all audio equipment e Check the input cables for broken ground shield connection e Use balanced connections where possible for the entire signal chain e The design of the amplifier eliminates internal hum fields but external transformers or other magnetic devices may cause hum Move cabling and signal sources t
28. iver or similar tool Do not use a 10 CLIP LIMITER ON pencil or other item that could break and fall into MODE SWITCHES the amplifier i CH 2 The possible operating modes are Stereo Biamp application uses Stereo mode too Parallel and Bridge Each is described in detail on pages 14 through 17 Additionally clip limiting and low frequency filtering are switchable on each channel Page 18 and 19 describes the clip limiter and LF filter operation Mode Switches are located on the rear panel Note The block diagrams in this section do not show all the required A connections They are simplified to convey the main operating principles of each operating mode For detailed connection information refer to pages 20 through 29 Stereo Mode In stereo mode each input signal is sent to its respective channel Each channel has independent gain gt o Ea SA XLR or RCA control clip limiting filtering input and output connection CH1 Input CH1 Output Mode switches O To operate in stereo mode set the set for stereo oudspeakers mode switches for stereo Set switches 4 5 6 and 7 to the left CH2 Input Connect the two input signals and the gt z gt gt XLR or RCA two speakers Continued top of next page AS SETUP Operating Mode Selection Stereo A Stereo Mode Notes eTo operate in stereo mode set switches 4 5 6 and 7 to the left position e nput connections connect
29. kers Output loudspeaker E E e0SC s DSP modules are ideal for biamp mode applications SETUP Operating Mode Selection Parallel Parallel Mode In parallel mode channel 1 and channel 2 XLR inputs are connected CH1 XLR Input in parallel Applying an input signal E to either XLR input will drive both gt gt channels Output Each channel still has independent Full range gain control clip limiting and palito loudspeakers output connection just like stereo mode Do not use CH2 gt input CH2 input is 6 Do not use the RCA inputs if c nnoct d internally i operating in parallel mode from CH1 Parallel Mode Notes A e Do not use the RCA inputs for parallel mode CH 1 eSet switches 4 5 and 6 to the right and MODE SWITCHES switch 7 to the left eConnect the single input signal to either CH1 PE PARALLEL or CH2 s XLR input connectors T A KRS 7 BRIDGE ON l a BRIDGE MONO OFF e Output connections binding posts or Speakon connectors connect CH1 and CH2 outputs to their respective speakers MODE SWITCHES e Since parallel mode connects both channels CH 2 XLR inputs in parallel the unused XLR can be used to daisy chain the input signal to another piece of equipment see p 21 Parallel Mode mode switches 4 5 and 6 to the right and switch 7 to the left SETUP Operating Mode Selection Bridge Bridge Mode In bridge mode both output channels are inte
30. n turn off capable equipment when it is not to be operated for extended periods 1 Note We recommend the front panel AC power switch be switched to the CONNECTIONS DataPort What is a DataPort The DataPort is a OSC specific connection used for INPUT IMPEDANCE 20K BALANCED interfacing amplifiers amplifier monitoring devices D and signal processors QSC Audio produces a line of digital signal processing as well as other accesso ries that plug directly into the DataPort The a DataPort connection provides all the necessary i interconnects between the accessory and the 5 amplifier For home theater and studio applications DSP can E be very useful for tuning the response of the system For example a QSC DSP 4 module con nected to the amplifier could be configured as a crossover or a subwoofer filter or many other functions Audio response can be tailored using the DSP and its software to compensate for speaker response dips or peaks Contact your OSC representative or OSC Audio directly to find out what DataPort accessories might fit your application Connecting In general the connection is made by orienting the DataPort accessory or cable s male HD 15 plug with the DataPort receptacle and inserting fully Tighten the retaining screws Do not use excessive force to tighten the retaining screws Refer to the instructions included with your DataPort accessory for detaile
31. nnector and speaker CH1 s Speakon can be used with a four conductor cable for carrying both outputs The required signal splitting i would take place at the speaker end of the cable Bridge Mode OUTPUT 1 1 OS NEG Pi PINOUT Bridge Mode Speakon connection uses CH1 s Speakon only Pin 1 is the positive signal and Pin 2 is the negative signal NOTE Make sure the speaker end is wired according to its specifications The diagram below assumes cabinet to be wired pin1 and pin 1 Verify proper connections are made BRIDGE 2 POS NEG OUTPUT 1 1 2 2 1 2 POS NEG POS NEG 1 POS NEG PINOUT 26 A PINS WARNING Use proper speaker wire Stereo or Parallel Mode Use NEC Class 2 wiring Bridge Mode Use NEC Class 1 wiring Refer to local and national electrical codes to assure code compliance CONNECTIONS Outputs Speakon Biamp Application Biamp Operation In biamp one channel is used for lows while the other channel is used for highs It requires the use of signal processing equipment between the source material and the amplifier Always test the system at the lowest practical power level for proper operation Biamp ready loudspeakers have no crossover and connect to the amplifier using the four conductor Speakon Some loudspeakers feature switchable passive or active biamp crossover configuration Make sure any swi
32. nonnnnnonnonncnnannos 10 Cooling Requirements datada 12 AC Power REQUIEM Sula 13 Operating Mode SelectiON ooooocoionoiononiononiononiononconononnoncnnoncnnononnoncnnannnoo 14 GUP IMNO oa lucia ot deed Mie mane oia 18 Low Frequency Filters Anisina nae aon 19 CONNECTIONS Inputs General Use and Recommendati0NS oococnicncocincnnncnnnnnncnnrnonononos 20 XLR and RCA Connector PiNQUtS ooccccncnccnociccococconoanonnnnnnancnnnnoo 21 Outputs General Use and RecommendationSs 0 cccccccceeteeceeeneee 22 Binding POSES sss aisles dad 23 SPCAKONSeritel Aa Malet ds td Made tle 25 Remote On Off Remote Trigg cccic dacensschesetats aiii 28 DataP Orb serve eet tentes et tl a dt a dote Al Me de a 31 USE AG POWGISS WI ai 32 Gain COMTO aiei O 32 Signal and Clip LED indicatis ccone aa 32 APPLICATION EXAMPLE oooooooooococooiococococococococonoororonoronoooorororonoronooonnnrororononos 33 TROUBLESHOOTING oo ooooooooccoooocccooccooocccooonocoonononononononononononononnnnnonnnnnnnn cnn 34 SPECIFICATIONS lt c Coat Sect tanal i eter ei Mogdd Mois aes 36 WARRANTY INFORMATION 0 0 ences cesesesteereesesieseesesseesieseseeeee 38 HOW TO CONTACT OSC AUDIO PRODUCTS ooo 38 INTRODUCTION General Overview 0SC s SRA Series Amplifier Congratulations on your purchase of the SRA Studio Reference Amplifier Series power amplifier To help you obtain the
33. o identify hot spots in the system then avoid those spots Cables with faulty shielding are a common entry point for hum Use top quality cabling Another common source of magnetic fields are wall warts or pluggable transformers keep input wiring away from them e Troubleshoot the system for ground loop problems Any identified ground loop must be broken using audio signal isolation Do not lift or break AC power grounds under any circumstance as safety of the system will be compromised 35 36 SPECIFICATIONS SRA Series Output Power watts per channel stereo parallel mode 8 ohms 20Hz to 20kHz 0 03 THD 4 ohms 20Hz to 20kHz 0 05 THD 2 ohms 1kHz 1 0 THD Output Power watts bridge mode 8 ohms 20Hz to 20kHz 0 10 THD 4 ohms 20Hz to 20kHz 0 10 THD Output circuitry Distortion SMPTE IM Distortion 4 and 8 ohm typical 20 Hz to 20 kHz 10 dB below rated power 1 kHz and below at full rated power Input Sensitivity for rated power into 8 ohm load Input Sensitivity for rated power into 4 ohm load Power requirements pink noise 1 8 rated power Slew Rate Frequency response all models LF filter switched off Damping factor 1 kHz and below Noise all models 20 Hz 20 kHz Specifications subject to change without notice SRA1222 200 350 600 750 1200 class AB lt 0 01 lt 0 02 lt 0 01 1 43V 1 35V 5 6 amps at 4 ohms ch 20V uS
34. o not use less than 4 ohm loads in A bridge mode Note polarity of con nections for bridge mode CONNECTIONS Outputs Speakon connectors Speakon Outputs The Speakon connectors offer quick reliable connection and disconnection of the speakers Although more expensive than banana or spade lug style speaker cable termination the speed convenience and reliability make Speakon use popular with portable and live sound setups The Speakons are wired CH1 Speakon Pin 1 CH1 positive Pin 1 CH1 negative Pin 2 CH2 positive Pin 2 CH2 negative CH2 Speakon Pin 1 CH2 positive Pin 1 CH2 negative WARNING Use proper speaker wire A Stereo or parallel mode Use NEC Class 2 wiring Bridge mode Use NEC Class 1 wiring Refer to local and national electrical codes to assure code compliance Two conductor Speakon Cable Use two conductor Speakon cable for stereo or parallel mode Two cables will be required one for CH1 and one for CH2 To Amplifier Four conductor Speakon Cable For biamp applications use four conductor cable Four conductor cable may be used for carrying both of the output channels with a single cable Signal splitting required at loudspeaker end of cable ES 9 To Speaker To Amplifier c 25 CONNECTIONS Outputs Speakon connectors Stereo or Parallel Modes Stereo and Parallel modes use one cable for each channel Each cable con nects to its respective output f co
35. ping Amplifier clipping generates internal error signals which cause the clip limiter to quickly reduce amp gain and minimize the overdrive To preserve as much of the program dynamics as possible limiting occurs only during actual clipping 10 CLIP LIMITER ON E MODE SWITCHES Each channel has its own clip limiter switch CH 2 that can be operated independently Switch 1 operates CH1 s clip limiter and switch 10 dE pee Channel 1 s clip limiter is operated by switch 1 operates CH2 s clip limiter E il 4 Channel 25s clip limiter is operated by switch 10 CLIP LIMITER ON To turn the limiter on slide the switch to the right Sw 1 Ch 1 Sw 10 Ch 2 CLIP LIMITER OFF To turn the limiter off slide the switch to the left Clip Limiting Tips Clip limiting reduces extreme overdrive peaks allowing a higher average signal level without audible distortion Increasing the gain with the clip limiter engaged until clipping is again audible can double the average output power Be careful not to exceed the power rating of your speakers The clip limiter is set to respond quickly after clipping is detected On low frequency material this may be perceived as a rubbery effect It may be preferable to turn clip limiting off and let the amp clip occasionally especially if the speakers are robust If operating in Bridge mode set CH2 s clip limiter to the same setting as CH1 s clip limiter SETUP Low Frequency Filter
36. prob lems Use another circuit or have the circuit checked by a licensed professional electrician TROUBLESHOOTING l am using the amp for a subwoofer application and it sounds rubbery what s up e Verify that the Clip Limiters are OFF Why The Clip Limiter is set to respond as quickly as possible after clipping is detected On low frequency material this may be perceived as a rubbery effect It may be preferable to turn Clip Limiting off and let the amp clip occasionally especially if the speakers are robust e f your subwoofer is rated for frequencies below 50 or 20 hertz set the Low Frequency LF filters accordingly No channel separation e Check the mode switch settings on the back of the amplifier If the mode switches are set for PARALLEL mode there will be no channel separation The mode switches must be set for STEREO for each channel to operate independently e Make sure other equipment in the signal path to the amplifier such as DSP mixers preamps etc is set for stereo not mono The output sounds distorted e Indication Clip indicator flashing If the red clip indicator flashes before the signal indicator does the load impedance is abnormally low or shorted Unplug each speaker one by one at the amplifier If the clip LED goes out when you disconnect a cable then that cable or speaker is shorted Try another cable and speaker to locate and or remove the fault e Indication Clip Indicator not flas
37. r ears then the ears attached to the rack using screws The amplifier is then installed from the front of the rack and the notch in the amplifier s rear chassis tab slides over the post SETUP Removing the Gain Control Security Cover Gain Control Security Cover The amplifier is shipped with its gain controls at their maximum setting of 29 dB and a security cover installed to prevent tampering To adjust gain settings remove the cover Reinstall the cover to prevent unintentional changes Cover retaining tab detail left and corre sponding chassis retaining slot right Removing the Security Cover 1 Using a 5 64 or 2 mm hex key remove the cover s retaining screw and set it aside eT 2 Insert the end of the hex key tool into the cover s screw hole and pull swing the plate out as shown 3 Once the right side has been withdrawn from its retaining slot pull the gain control lockout plate out from the front panel recess continued following page 10 SETUP Installing the Gain Control Security Cover 4 Gain controls exposed for adjustment Installing the Gain Control Security Cover 1 Slide the cover into the front panel recess Push it fully to the right and against the front panel You should feel the covers retaining tabs drop into the slot in the front panel 2 While lightly pressing the right side of the cover against the chassis use the hex key tool inserted into the pla
38. rconnected into one higher power output The result is one output with about 4 times the peak power and about 3 times the sustained power of a single channel Use CH1 s gain control clip limiter and LF filter Use channel 1 s XLR or RCA input Output connection is different for bridge mode the positive output for each channel gets connected to the loudspeaker Page 24 details bridge mode output connections for binding posts and page 26 for Speakon bridge output connections CH1 Input set for bridge 20 Do not useCH2 input CH2 input is internally En bridged with G2 Single high power loudspeaker Mode switches l CH1 Bridge Mode Notes e To operate in bridge mode set switches 4 5 6 to the left and switch 7 to the right position CH 1 MODE SWITCHES e Input Use CH1 s XLR input connector e Output connections Use the two red binding 4 posts CH1 red binding post positive CH2 red ml 5i XR binding post negative or use CH1 Speakon It PL vrs i ae fe p BRIDGE MONO OFF 7 BRIDGE ON terminal 1 and 2 1 is positive Rs ha s sie p T gain MODE SWITCHES control Se s clip limiter to the same setting as CH1 s CH 2 Bridge Mode mode switches 4 5 and 6 to the left and switch 7 to the right 18 SETUP Clip Limiter Clip Limiters CH 1 The SRA has separate clip limiters for each MODE SWITCHES channel which respond only to actual amplifier 1 CLIP LIMITER ON clip
39. t to the on position for the frequency take place regardless of the frequency selection SRA Series amplifier low frequency response curves 0 Output dB A J E 100 200 Frequency Hertz Co N a S 500 k 20 Audio Input Connections Input connections to the SRA can be made with balanced XLR connectors for all operating modes or unbalanced RCA connectors for Stereo and Bridge mode We recommend using the balanced XLR connectors whenever possible Unbalanced connections are prone to noise and interference pickup as well as ground loop induced hum The XLR connectors are precision balanced 0 1 tolerance on balancing resistors and provide superior audio performance over the RCA connec tors The RCA connectors are unbalanced and thus prone to ground loop and common mode noise pickup as are all unbalanced connections The RCA connectors have special circuitry added to help minimize ground loop induced hum This Input Connector Use CONNECTIONS Inputs General Information circuitry inserts a small impedance between the RCA connector s ground and the chassis ground If the mode switches are set for parallel mode the XLR input connectors are directly wired in parallel This means the input can be connected to either of the XLRs and the remaining XLR can be used for daisy chaining the input signal to o
40. tchable loudspeaker is set for Active mode to disable the internal crossover if you are biamping Amplifiers designed specifically for biamp opera tion have different power points for each channel Because high frequency drivers are much more CECA Pins 1 1 2 2 1 2 POS NEG POS NEG POS NEG OUTPUT POS NEG PINOUT efficient than are low frequency drivers less power is required at higher frequencies Biamp makes more efficient use of the power available from a given amplifier and provides more head room at lower frequencies Triamp systems add one more level of frequency separation for amplifi ers and speakers Conventional speaker crossovers consist of inductors capacitors and resistors The heat generated in these components is power that could be delivered to the speaker Near the crossover frequency power loss can be close to 50 No wonder professional sound companies prefer the multi amplification approach Biamp triamp or more it makes best use of the available AC power to produce sound 27 28 CONNECTIONS Remote on off remote trigger Remote Trigger Remote turn on and turn off capability is provided by the remote trigger jacks on the rear panel Remote trigger can be operated by two methods 12 Volt DC or contact closure switch relay The IN and OUT jacks can be used interchangeably as they are wired in parallel The amplifier s front pan
41. te s screw hole to slide the cover to the left until the LEDs line up with the cover s holes Continue to lightly press the cover against the chassis while you insert the covers retaining screw and secure the screw Fully tighten the retaining screw SETUP Cooling Requirements Cooling Air Inlet and Exhaust Vents The amplifier has a rear mounted variable speed fan Speed is determined by the temperature of the amplifier s internal heat sink assembly Cooling air enters the rear of the amplifier and exhausts from the front vents If mounting in an enclosure be certain not to restrict airflow Warm air exhausts through 4 the front Gu panel 3 vents Cool air is pulled into the rear of the amplifier Equipment Rack A Do not obstruct cooling air vents SETUP AC Power Requirements AC Power Verify operating voltage before plugging amplifier into AC mains Make sure the AC mains voltage is the same as specified on the serial number plate Do not use a smaller gauge cord than supplied with the amplifier 120 Volt models are sup plied with a 14 AWG cordset 220 Volt models are supplied with 1 0 mm cordset A Do not use improper AC mains voltage It can create hazardous conditions and severely damage the amplifier AC Power Connection MODE SWITCHES STEREO FILTERS MODE USE CH1 INPUT USE THE BRIDGE MONO SPEAKER PARALLEL CLIP LIMIT XLR MODE OFF
42. the apparatus 11 Only use attachments accessories from QSC Audio Products Inc 12 Use only with carts stands tripods brackets interconnecting cables or software specified by QSC Audio Products When moving or transporting using a cart use caution to avoid injury from tip over 13 Unplug the apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified 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 15 When installing equipment into a rack distribute the units evenly Otherwise hazardous conditions may be created by an uneven weight distribution 16 Connect the unit only to a properly rated supply circuit 17 Reliable earthing grounding of rack mounted equipment should be maintained 18 Maximum operating ambient temperature is 50 C 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 humans The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainten
43. ther equipment shown opposite page bottom Do not daisy chain from an RCA connector Make sure only one input signal is applied to the amplifier when operating in Parallel or Bridge modes If your system has noise or hum disconnect all amplifier inputs to verify the source of the noise If the noise disappears the noise source is not the amplifier Check cabling and other equipment connections see p 35 for troubleshooting Use the RCA XLR or e Xx DataPort connectors RCA Ke 4 for signal input to unbalanced lt ag the amplifier Do not ma 4 sce mix input connector usage OR XLR lt balanced or unbalanced Use balanced connections and high quality cable and connec tors for best results DataPort refer to DataPort accessory s instructions INPUT IMPEDANCE 20K BALANCED TOK UNBALANCED CONNECTIONS Inputs XLR and RCA Connector Pinouts XLR Connector Pinout Jumper A LA e N Balanced Unbalanced OL pin 2 pin3 a pin2 h pint z pins 1 and 3 RCA phono plug Connector Pinout Signal Ground Daisy Chain Example parallel mode only All amplifiers being daisy chained must be in parallel mode Input signal INPUT IMPEDANCE ZOK BALANCED 1 MODE SWITCHES Sato FUTERS STEREO 1 l l l
44. with primary system controller 12VDC output Another possible remote on off solution is shown to the right This solution uses a 12 Volt DC signal and a switch wired to the mono mini plug Make sure any AC adapter used is DC voltage output not AC to remote trigger in Note We recommend the front panel AC power switch be switched to the A off position anytime the system will not be operated for an extended period This prevents the remote trigger from accidentally powering up the amplifier while you are away It is a good idea to do the same with all remote turn on turn off capable equipment when it is not to be operated for extended periods CONNECTIONS Remote on off remote trigger Contact Closure Type Contact closure remote SRA amplifiers using stereo For contact closure remote mini plug ring and sleeve trigger operation use stereo 3 terminal 3 5 mm mini plug Do not use a mono 2 termi nal plug Processor or other master turn on device with contact closure remote trigger output Connect a suitable two conductor cable to the plug Connect the sleeve of the plug to one wire and the ring to the other wire The tip of the plug
45. with the gain controls set at maximum 10 for security cover removal and installation information INPUT IMPI NCE 20K BALANCED CH 1 ODE SWITCHES s TOK UNBALANCED EE as MODE eos Me ROSE F ON x 1 Ci JA E _C E 2 merae Cd jz E CH 1 s 3 SOWZFILTER zoe ja Eds Es OMT E BE MODE SWITCHES Hi El y aos lt E A H Ee 3 Zune PTER co gt O Ep du Cj du A OUTPUT yet ZNE FLER r 10 CLIP LIMITER ON MODE SWITCHES K E w CH2 We gt pe INPUT PINOUTS Hat OH CH 2 PIRIN Pos NES PINOUT Rear Panel 1 DataPort connector 2 Channel 1 RCA input connector 3 Channel 2 RCA input connector 4 Channel 1 XLR input connector 5 Channel 2 XLR input connector 6 Mode switches 7 XLR connector pinout reference chart 8 Channel 1 Speakon pinout reference chart 9 Channel 1 Speakon output connector 10 Channel 2 Speakon pinout reference chart 11 Channel 2 Speakon output connector 12 Channel 1 binding post output connectors 13 Channel 2 binding post output connectors 14 Cooling air intake vents 15 Remote trigger in out jacks 16 Remote Trigger pinout reference chart 17 Serial number decal location 18 Mode switch settings reference chart 19 AC power cord entry IEC inlet UNPACKING AND INSPECTION
Download Pdf Manuals
Related Search