The voicing of the channel is shifted when ‘high gain’ mode is selected to a darker, heavier and more
contemporary sound.
Please note that the GAIN BOOST control will have no effect on the sound if channel two is switched to
‘vintage gain’ mode (the FETs are switched out of circuit and the overdrive is pure valve gain).
Important: It should be noted that on a modern high gain amplifier such as the Tramp Tube, the best
overdrive sounds are not found with ‘everything on 10’ - you should experiment with the controls using
care, as the tone of the amplifier may well suit your style of playing with slightly less gain than you might
first expect. It is the dynamic response of the Tramp Tube amplifier that gives it its ‘valve like’ feel to play.
Channel two/three bass, mid, treble
This 3 way passive EQ circuit is primarily voiced for overdriven sounds. The controls are all highly
interactive, so please experiment with the settings to find a sound that suits your guitar and style of playing.
In particular, the TREBLE control has a great deal of effect on the overall character of the overdrive sound.
Level
This control determines the output gain of channel two/three. It should be used in conjunction with the
GAIN, GAIN BOOST, MASTER and MASTER BOOST controls to set an appropriate sound and volume level,
and also to balance the relative volumes of the clean and overdriven channels.
Effects send and left & right returns
This is a series line-level stereo effects loop. The effects are placed in series with the original signal, after
the individual channels but before the reverb and master volume section of the preamplifier, allowing post-
overdrive effects such as delay, chorus and digital reverb to be used.
Chorus
This digital effect is controlled by two rotary controls, RATE and DEPTH, as well as an effect on/off switch.
With the switch in the out position the chorus effect is also footswitchable.
What makes Quad chorus different from normal stereo chorus is that there are actually two chorus sweeps
going on at once, with different rates, which are then summed and control a stereo chorus circuit. Therefore
it is like having two stereo choruses on at once. The overall effect that this produces is richer sound with
less of the periodic ‘cycling’ typical of cheaper chorus effects.
The RATE control sets the speed of the two chorus sweeps, these have purposely been set at different times
and the ratio between them changes as the RATE control is turned up.
The DEPTH control sets how subtle or severe the chorus effect is in the overall sound.
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