5
PF-350 / PF-500 / PF-800 Bass Guitar Amplifier
PF-350 Front Panel - Continued
654321
input
pad
-15dB
bassgain midrange treble volume
limiter
audio
in
phones
PF 350
peak
limit
0 100 100 100 100 10
fault
13121110987
7. TREBLE: Use this to adjust the high
frequency level of the amplier. This
provides up to 19 dB of boost, or –25
dB of cut, at 8 kHz. The high frequency
output is attest at the center position.
8. VOLUME: Use this to control the overall
output level. It aects the Speaker
Outputs and preamp level to the
Headphone Output. Use it wisely and
turn it down when making connections,
putting on headphones, or trying
something new�
9. LIMIT LED: This LED illuminates
when the Limiter circuit is activated,
indicating that the amplier is nearing
full output, and the limiter is keeping
peak signals from clipping the output.
10. LIMITER SWITCH: Press this switch in
to add the limiter circuit. If the signals
driving the amplier start to peak, the
limiter will automatically reduce the
signals to prevent clipping, and the
Limit LED [9] will ash. The Limiter will
help keep the amplier’s output “clean”
up to high output levels and avoid
potentially damaging distortion�
11. FAULT LED: This LED illuminates amber
if the amp thermals and shuts down or
develops other fault conditions. See
“Fault/Thermal Considerations” on
page 16 for more information�
12. AUDIO IN: The audio output from line-
level sources, such as a mobile device
or MP3 player, can connect to this 1/8"
TRS stereo input. The incoming audio
is mixed with the preamp signals so
you can play along to a practice track
as you listen with headphones. (The
audio coming in here only plays in the
headphones, and appears nowhere
else. It is not aected by the Volume
control.)
13. PHONES: Use this 1/8" TRS stereo
output to connect your headphones.
The output here is a mix of the line level
signals reaching the amplier, and any
incoming audio from the Audio In jack
[12].
If you just want to listen and practice
through headphones, disconnect the
speaker outputs [18] from the speaker
cabinet. There is no harm in playing
the PF-350 without speakers.
Before putting on headphones,
make sure the Volume control [8]
is turned down, and (if connected) any
external audio source has its level
turned down. This will reduce the
chance of hearing damage due to
loud volumes.