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1. 0dB Input accepts a standard 1/4” instrument
plug from your bass. This input is suited for use
with instruments that have passive electronics.
2. -15dB Input accepts a standard 1/4” instru-
ment plug from high output basses. This input is
padded 15dB to compensate for higher output
sources and is suited for use with basses that
have active electronics or high output pickups.
3. Ultra Low increases the low frequency output
by 7dB at 40Hz. This adds to the rumble and
overall feel of the low bass notes.
4. Ultra Mid decreases the mid frequency out-
put by 6dB at 600Hz. This removes some of the
middle frequencies for a “contoured” sound.
5. Ultra High increases the high frequency out-
put by 7dB at 5kHz. This adds crispness to your
sound.
6. Peak LED illuminates when the Gain control
(#8) is set too high. This indicates overdriving of
the preamplifier which causes clipping. (See the
Gain control, #8.)
7. Signal LED illuminates when the Gain control
(#8) is adjusted properly. (See the text for the
Gain control.)
8. Gain must be adjusted to match the output of
your instrument to the amplifier. For the proper
setting, turn on the amplifier, rotate the Gain
control and the Master control (#13) fully count-
er clockwise and begin playing your bass.
Rotate the Gain control clockwise until the
Signal LED (#7) illuminates while playing and
the Peak LED (#6) flashes occasionally.
9. Bass adjusts the output level of the low fre-
quencies and offers a cut or boost of 12dB at
70Hz.
10. Low Mid adjusts the output level of the lower
midrange frequencies and offers a cut or boost
of 12dB at 300Hz.
11. High Mid adjusts the output level of the
upper midrange frequencies and offers a cut or
boost of 11dB at 1.5kHz.
12. Treble adjusts the output level of the high
frequencies and offers a cut or boost of 14dB at
7kHz.
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