Ampeg BA-108 - Manual (Page 5)

BA-108 / BA-110 Bass Guitar Combo
5
BA-108 / BA-110 Top Panel
1. 0 dB INPUT: The signal output from a
passive instrument may be connected to
this 1/4" input by means of a shielded
instrument cable.
2. –15 dB INPUT: The signal output from
an active instrument may be connected
to this 1/4" input by means of a shielded
instrument cable.
3. VOLUME: Use this to control the
overall output level. It affects the preamp
level to speaker and phone outputs. Use
it wisely, and turn it down when making
connections, putting on headphones, or
trying something new. It does not affect
the signal fed to the CD input.
4. TREBLE: Use this to adjust the high
frequency level of the amplifier. This
provides up to 14 dB of boost, or
–14 dB of cut at 5 kHz. The high
frequency output is flat at the center
position.
5. MID: Use this to adjust the midrange
frequency level of the amplifier. This
provides up to 12 dB of boost, or
–12 dB of cut at 600 Hz. The midrange
frequency output is flat at the center
position. Rotate the control counter
clockwise for a “contoured” sound
(more distant, less midrange output) or
clockwise for a sound which really cuts
through.
6. BASS: Use this to adjust the low
frequency level of the amplifier. This
provides up to 12 dB of boost, or
–12 dB of cut at 40 Hz. The low
frequency output is flat at the center
position.
7. CD LEVEL: Use this to control the
output level of the signal fed to the CD
input. Use it wisely, and turn it down
when making connections, putting on
headphones, or trying something new.
8. CD INPUT: The audio output from line-
level sources, such as an iPod ® , MP3,
or CD player, can connect to these RCA
inputs. The incoming audio is mixed with
the preamp signals, so you can play
along to a practice track, as you listen
with headphones.
9. PHONES: Use this 1/4" TRS stereo
output to connect your headphones.
The output here is a mix of the line-level
signals reaching the amplifier, and any
incoming audio from the CD input jacks.
Before putting on headphones, make
sure the volume control 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.
Note: the speaker is muted when
headphones are plugged in.
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BA-1XX
)NPUT 0OWER
-15dB 0dB (EADPHONES
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