1231 User Manual

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power switch or a master equipment power switch. Since the 12 Series Equalizers consume a relatively small

amountofpower,theunitsmaybeleftoncontinuously.

rear panel desCrIptIons

Rear Panels

1231 - dual channel 31 band graphic equalizer

1215-dualchannel15bandgraphicequalizer

Power Switch: Switches the power on and off. Always make audio connections with the power switch in the OFF

position.

Power Cord Receptacle: Connects AC power to the equalizer.

Output Connectors:Threetypesofoutputconnectorsareprovidedforoutputconnections:maleXLRtypecon-

nectors,1/4"tip-ring-sleevephonejackconnectorsandabarrierstrip.

Input Connectors: Threetypesofinputconnectorsareprovidedforinputconnections:femalelockingXLRtype

connectors,1/4"tip-ring-sleevephonejackconnectors,andabarrierstrip.Themaximuminputlevelthattheequal-

izercanacceptis+22dBu(ref:0.775Vrms).

Byremovingthejumperconnectingthetwoscrewsonthebarrierstrip,thechassis

groundisseparatedfromthecircuitgroundoftheequalizer.Thisissometimesnecessarytoprevent“groundloops”

inasoundsystem.Whenliftingthegroundstrap,youmustmakeaconnectionfromthecircuitground(

Without Jumper in Place With Jumper in Place

jumper

optional

circuit

ground

chassis

ground

circuit

ground

chassis

ground

to system

ground

optional

WIRING CONNECTIONS WITH GROUND

Input

Cable

Output

Cable

Input

Cable

Output

Cable

)terminal

to some other ground point in your audio system in order for the equalizer to function properly.

OPERATION MANUAL

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User Manual - Page 8