User`s manual

Channel 1 Treble:
The treble control adjusts the high frequency equalization of the clean channel.
Channel 1 Master:
The output level control is the overall level control for the clean channel. It should be
used to equalize the volume between the clean and distortion channel when switching
between them.
Ch 2 Gain:
This is the distortion channel gain control. For the cleanest possible tone, turn the
channel 2 Master up all the way and use the channel 2 Gain control as the overall
channel volume. For the most sustain and distortion, turn the channel 2 Gain control all
the way up and use the channel 2 Master to control the overall volume. The “normal”
setting for the gain control is around the 1 to 2 o’clock position. This will give a good
crunch tone, and when the gain boost is turned on, it will give a very noticeable
distortion/sustain increase for leads. If the gain control is turned all the way up, there will
be much more distortion in the non-boosted mode, so the additional distortion added by
the gain boost may not be as apparent. Of course, this setting is all dependent on guitar
type and playing style, so it should just be used as a starting point for experimentation.
Channel 2 Bass:
The bass control adjusts the low frequency equalization of the distortion channel.
Channel 2 Middle:
The middle control adjusts the midrange frequency equalization of the distortion channel.
Channel 2 Treble:
The treble control adjusts the high frequency equalization of the distortion channel.
Channel 2 Master:
The output level control is the overall level control for the clean channel. It should be
used to equalize the volume between the clean and distortion channel when switching
between them.
Presence:
The presence control adjusts the high frequency equalization in the output stage. It is a
"shelving" control that operates by cutting the amount of high frequencies in the global
negative feedback loop, which results in a boost in the output high frequency range and a
subjectively "brighter" and more "open" tone in the highs due to the lower negative
feedback at those frequencies. The presence control frequency range is higher than
most presence controls, and is primarily designed to add “sizzle” to the distortion
channel, acting as a fourth eq control voiced above the treble control range. The treble
and presence controls should be interactively adjusted to voice the top end of the
distortion tone. Since it is a global control (it affects both clean and distortion channels
simulataneously) if it is turned up too high, you may want to turn off the channel 1 bright
switch or use less channel 1 treble to compensate.