>> Front Panel
1 INPUT
Plug in your shielded instrument cable into the input
labelled “Input” when using an instrument with passive
pickups or relatively low output level. Instruments with
active pickups or onboard preamps plugged into this in-
put will saturate the preamp stage much earlier.
-10 DB
When using a bass guitar with active pickups or basically
delivering relatively high output levels we advise you to
use the input jack labelled “-10DB”. The input signal will
be attenuated by 10 dB. Attenuation allows the “GAIN”
control (#3) to be used in a more subtle way by somehow
altering the taper of the pot – the “GAIN” control can be
brought up to a higher position now.
3 GAIN
This control, along with the “Input” or “-10DB” inputs,
adjusts the basic signal level in the valve preamp and
thus determines it’s sensitivity and overall tonal charac-
teristics. Turning the Gain clockwise will make the valve
preamp slightly compress the signal and eventually ove
drive it in a moderate way. Therefore the circuit can do
without a CLIP LED since a slightly overdriven bass sound
rich in second order harmonics is always welcome.
Do not leave the “VOLUME” control on your instru-
ment set too low, since noise picked up along the
cable will become more prominent and thus lower
the – otherwise excellent – signal-to noise ratio
of the amp.
4
INPUT
-10 DB
GAIN
BASS
LOMID
HIMID
TREBLE
MASTER
BREAK
ON
1
3
4
5
2
11
Summary of Contents for Raptor Top
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