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VOLUME
PULL GAIN
This is a push/pull potentiometer. Pushed in the control acts like a normal volume control on a
typical non-master volume amplifier, therefore it sets the overall volume level of the amplifier
and has a huge effect on the tone and the amount of overdrive. From low to about halfway,
depending on the output level of the guitar and which input socket is used, the sound should
remain reasonably clean. Increasing the control further will progressively increase the level of
power amp overdrive in the sound, obviously being a valve amp it will respond to the player’s
dynamics and use of the instruments volume.
Pulling the control out activates the additional valve preamp stage therefore effectively turning
the control from a VOLUME into a GAIN control. This extra gain stage makes it possible to
produce a fuller overdrive sound especially when turned up as this blends preamp distortion
with power amp distortion. With the control pulled out the extra gain stage is also
footswitchable. This enables the user to footswitch between clean and dirty sounds.
Setting the VOLUME at about 12 o’clock gives lovely warm clean sounds which can then be
switched to a nice, not too saturated overdriven tone.
For total and instant control over a range of clean and overdriven tones we recommend
turning the VOLUME control all the way up. Without the extra gain stage switched in the player
can then back off the volume on their guitar for clean sounds, turn up fully for some crunchy,
responsive power amp overdrive, and then kick in the extra gain stage for thick lead tones
with lots of sustain.
TONE
Unlike other single tone controls on other amplifiers, which act merely as a treble roll off, this
control works in a different way. It is a dual gang potentiometer which controls two functions
simultaneously. In the fully anti-clockwise position the midrange is dominant in the sound,
turning the control clockwise decreases the mids while at the same time increasing the higher
frequencies.
Start with it in the 12 o’clock position and try different settings with or without the BRIGHT
switch to find the settings that you like. Bear in mind that as the VOLUME is turned up the
BRIGHT switch has less effect.
REVERB
This single control is for adjusting the amount of reverb effect in the sound. The effect is
produced by a three spring reverb tray inside the cabinet. However due to a simple but
extremely effective modification to the signal between the reverb tray and the stereo power
stages, what you actually hear is a huge pseudo-stereo reverb that seems to fill the whole
room. It is even more noticeable when using extension cabinets.
FOOTSWITCH SOCKETS
