Ampeg PF-350 - Manual (Page 15)

PF-350 / PF-500 / PF-800 Bass Guitar Amplifier
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PF-500 / PF-800 Rear Panel continued
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29 30 31 32 33
XLR line
out
pre-EQ
post-EQ
300 W @ 8 Ω 500W @ 4Ω MIN LOAD [PF-500]
400 W @ 8 Ω 800W @ 4Ω MIN LOAD [PF-800]
send
return
tuner out pwr amp in pre amp out
patch
power
LIFT
GND
-40dB
0dB
ft switch
speaker outputs
CLASS 2 WIRING
fx loop
PF 800
PF 500
25. GROUND / LIFT: Press this switch in to
engage the Ground Lift, if necessary, to
help eliminate hum at the XLR jack.
26. 0 dB (line level) / -40 dB (mic level):
Press this switch in to apply a –40 dB
cut to the signal at the XLR Line Out
[24].
27. POST-EQ/PRE-EQ: The signal at the
XLR Line Out [24] can be set to either
Pre-EQ or Post-EQ with this switch. With
the switch in the IN position, the signal
at the XLR Line Out is Pre-EQ. This is a
direct output not affected by any EQ or
boost settings. With the switch in the
OUT position, the signal is Post-EQ and
is controlled and modified by the tone
controls, and the effects loop.
28. FX SEND JACK: Use this 1/4" TS
unbalanced output to send a line-level
output to an external effects processor
(for example). The output here is
affected by all controls except the
volume.
Use the FX return jack to feed the
returned processed signals back into the
power amplifier.
29. FX RETURN JACK: Use this 1/4" TS
unbalanced input to return the
processed line-level output of an external
effects processor (for example). The
processor could be fed by signals from
the FX send [28].
30. TUNER OUT: This jack supplies the
only live output when the mute switch
is engaged. This allows for silent tuning
through an electronic tuner or killing the
house send with a monitor mixer send
still active.
31. PREAMP OUT: This jack is a direct
post master preamp output for use with
an external power amp. Connect the
external amp’s input to this jack using a
shielded instrument cable.
32. POWER AMP IN: This jack connects
directly to the internal power amp for
use with an external preamp. When
using an external source, connect the
OUTPUT of the source to this jack using
a shielded instrument cable to feed the
signal into the power amp section. The
internal signal is disconnected when a
plug is inserted into this jack.
33. FOOTSWITCH: Connect a dual
footswitch to this jack for remote Mute
and FX On/Off control. On the stereo
1/4" plug, the tip controls Mute and
the ring controls FX On/Off. The Mute
function is available from either the front
panel or the footswitch.
NOTE: A footswitch may be purchased at
your local Ampeg Dealer or ordered
directly from LOUD Technologies Inc. Be
sure to ask for model #AFP2.