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GROUND POLARITY SWITCH (30)
Three-position, rocker-type switch which, in most applications, should be operated in its center (zero)
position. There may be some situations when audible hum and/or noise will come from the loudspeaker. If
this occurs, position the Ground Switch to either positive or negative (+ or -), or until the noise is minimized.
Note: Should the noise problem continue, consult your authorized Peavey dealer, the Peavey factory, or a
qualified service technician. The Ground Switch is not functional on 220/240 volt models.
PARALLELED SPEAKER JACKS (31)
Two 1/4" speaker jacks are provided. These jacks are in parallel. The impedance switch selects the total
impedance plugged into the amplifier.
IMPEDANCE SELECTOR SWITCH (32)
Used to select the impedance of the total load plugged into the speaker jacks of the amplifier.
Note: For speakers in series, the impedance will add. For two speakers of equal impedance in parallel, the
total impedance is half.
REMOTE SWITCH JACK (33)
Provided for connection of the footswitch. Footswitch allows channel selection, channel combine and effects
loop. Front panel Channel Select and Channel Combine switches must be in the "out" position for footswitch
to function properly.
XLR JACK (34)
A transformer balanced 600 ohm XLR jack is provided for direct patching of the amplifier to recording or
sound reinforcement consoles.
GROUND LIFT SWITCH (35)
Provided to lift the XLR jack ground when hum loops are encountered when patching the amplifier to mixing
consoles.
PRE/POST SWITCH (36)
Provided for the selection of either a Pre or Post EQ send to be internally patched to the XLR jack.
PREAMP OUT/POWER AMP IN JACKS (37)
These jacks are provided for in-line patching of effects devices. To patch an effects unit, connect the Preamp
Output to the input of the device. Next, connect the output of the device to the Power Amp Input (high-
quality, shielded cables must be used for these connections). The Preamp Output can also be used to route
the line level signal to a mixing console, tape recorder, etc. Connect the Preamp Output, using a shielded
cable, to an input of the tape recorder, mixer, etc. This patch does not affect the operation of the amplifier.
Note: The Preamp Output level is approximately 1 volt RMS and is of relatively low impedance (600 ohms).
Any effects device used in this effects loop must be capable of receiving 1 volt input and providing 1 volt
output in order to properly drive the power amp. The Power Amp Input has an internal switch which discon-
nects the internal preamp.
EFFECTS SEND/RETURN JACKS (38)
Provided for connecting external effects devices into the signal path. To patch an effects device, connect the
send jack to the input of the device. Connect the output of the device to the return jack. High-quality shielded
cables must be used for these connections.
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