
5
Energy-Efficient, Multi-Function 80-Watt Mixing Amplifier with Dual 70/100 V and 4 Ohms Outputs
MA4008
Themixer-ampliershallbeofrack-mountablemulti-inputdesignwithbuilt-inpagingfunctionsandtwomono
transformerlessClassDpoweramplierswithswitch-modepowersupplies,onelow-Zandonehigh-Z(70/100V)
fordistributedspeakersystems.
Controls and indicatorsshallincludethefollowing:
• Powerswitchtoturntheunitonando
• PowerIndicatordisplayingamberlogowhenunitispowered
• MasterVolumeknobforsettingoverallvolume
• Indicatorringforpower(yellow)andclipping(ashingred)
• VUmetertoindicateampliersignallevel
• HIEQ/LOEQknobstoadjusttheoveralltrebleandbass
• Inputlevelknobs(1-8)tosettherelativelevelofeachinput
• Mainsvoltageswitchtoselect115or240VAC
• High-Zoutputswitchtoselect70or100Voperation
• Phantom/Mic/Lineswitch(8)toselectmodeofeachinputchannel
• SignalLED(8)foreachinputtoindicatepresenceofsignal
• Gainscrewpot(8)foreachinputtotriminputgain
• Z2/MOHDIPswitches(8)toassigninputstotheZ2/MOHout
• FunctionDIPswitches(8)toassigninputs5-8,enablesignalinserts,andsetthepageinputforline,mic,orphantom-powermic
• Pageinputscrewpottoadjustpaginginputlevel
• Mutedepthscrewpottosetduckingofauxinputsduringpages
• Z2/MOHoutputscrewpottoadjusttheleveloftheZ2/MOGfeed
• Balancescrewpottoadjusttherelativeoutputofthetwoamps
Connectionstothemixer-ampliershallinclude:
• Mic/LineinputsonfourXLR/TRS(¼-inch)combinationjacks,six3-pinEuroblockconnectors,andtwo4-pinEuroblock
connectorswithmuteterminal
• Auxinputsonfourpairsofunbalancedline-levelRCAjacks,eachsummedtomono
• Tel/Pageinputona4-pinEuroblockconnector
• Outputforbothhigh-andlow-Zona4-pinEuroblockconnector
• Z2/MOHline-leveloutputonapairofRCAjacks
• Recordline-leveloutputonapairofRCAjacks
• EectsinsertsonRCAjacks(sendandreceiveforeachamp)
• Remotecontrolinputon5-pinEuroblockconnector
• ACpoweronIECjack
Architect’s and Engineer’s Specications
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