4
GAIN
TONE
LEVEL
VOLUME
INPUT
A
B
FORWARD
Thank you for purchasing the Guytron GT-100. The exclusive patented design delivers
that "On 10" sound at any volume (without external power attenuators), restoring power amp
distortion and harmonics missing from conventional master volume technology. The GT-100 is a
two channel, 100 watt, pure tube amplifier with vintage tones and modern features, all hand built
in the U.S.A.
INTRODUCTION
The heart of the tone generation is in the unique foot switchable pre-amp design that
incorporates two EL84’s running in "Class A" configuration. Class A is the oldest and purest
way of amplifying a signal. Naturally, there are raging disputes among audiophiles as to what is
Class A and what is not, but this section of the amp is Class A, and that is where the feel and
basic tonal character get established. The signal does however make a transition into the Class AB
arena and that is one of the secrets of the Guytron tone.
Channel "A", favoring the 50’s to 60’s stock amp tone, starts out crystal clear at low gain
settings, progressing smoothly up to a ’cranked up’ stock amp type of overdrive. The Channel
"A" tone control involves the gain structure and the amp picks up more gain in the treble range as
you turn it clockwise, yielding a progressively more "English" tone along the way. Channel A has
become very popular and is known for its unique brand of sparkle, and punch.
Channel "B" takes over where channel "A" leaves off, encompassing most of the favored
tones of the modded amp era, mid 70’s, to present. The gain control in Channel "B" is a monster,
by utilizing a dual pot it controls two stages of gain simultaneously, allowing a continuous sweep