13
PF-350 / PF-500 / PF-800 Bass Guitar Amplifier
PF-500 / PF-800 Rear Panel - Continued
19 20 21 22 23 23 24 2625 27 28
29
3031
32
33
XLR line
out
pre-EQ
post-EQ
300 W @ 8Ω 500W @ 4Ω MIN LOAD [PF-500]
400 W @ 8Ω 800W @ 4Ω MIN LOAD [PF-800]
send
return
tuner outpwr 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,
making it a direct output not aected
by any EQ or boost settings. With the
switch in the OUT position, the signal is
Post-EQ and is controlled and modied
by the tone controls, and FX Loop.
28. FX SEND JACK: Use this 1/4" TS
unbalanced output to send a line level
output, for example, to an external
eects processor. This output is
aected by all controls except the
Volume.
Use the FX Return jack to feed the
returned, processed signals back into
the power amplier.
29. FX RETURN JACK: Use this 1/4"
TS unbalanced input to return the
processed, line level output of, for
example, an external eects processor.
The processor could be fed by signals
from the FX Send [28].
30. TUNER OUT: This jack acts as 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/O control.* On the stereo
(TRS) 1/4" plug, the tip controls Mute
and the ring controls FX On/O. The
Mute function is available from either
the front panel or the footswitch.
*NOTE: A footswitch (model #AFP2)
may be purchased at your local
Ampeg Dealer, or ordered directly from
the Ampeg website, at
https://shop.ampeg.com/�