The BASS, MIDDLE, and TREBLE controls
are
of
the
"boost
and
cut"
configuration, and
exhibit a great
deal
of
control over their operating ranges . However, the type
of
guitar, strings,
and
playing style will have a noticeable effect
on
the tone control operation. The electric guitar
has
a frequency range of from approximately 74Hz (open
low
E)
to 1320Hz ( 12th fret high
E)
. The
dominant harmonic overtones occur
in
the frequency range
of
128Hz
- 5280Hz. The relationship
between the fundamental frequency and the harmonics determine the tonal quality of the
amplified sound. The tone control circuitry provides the musician with the means to control the
amplitude relationship between these frequencies.
The tone control circuits
are
configured very much like those
used
on
the older tube-type
amplifiers.
"T:his
arrangement
has
the advantage of unique boost and cut points and the
disadvantage that if
all
three tone controls
are
adjusted to minimum,
no
output signal will result.
The BRIGHT switch located
on
the TREBLE control (pull for "on")provides a very noticeable
increase
in
the extreme treble when the VOLUME control
is
advanced past position 5.
Tremolo
SPEED
and
DEPTH
controls
are
used to adjust the rate and effect
of
the tremolo
circuitry. The tremolo
SPEED
control adjusts the rate at which the tremolo circuits vary the
intensity
of
the amplified signal. The
SPEED
control will only function when the tremolo foot
switch
has
been depressed and the
DEPTH
control advanced to a
r.iominal
operating position
(5)
.
The tremolo
DEPTH
control adjusts the amount
of
effect the tremolo circuitry
has
on
the amplified
sound.
The R
EVER
B control adjusts the amount
of
artificial reverberation mixed with the input
signal. As the control
is
advanced
in
the clockwise direction, more
of
the reverberation effect
results. When the control
is
adjusted to minimum, the reverb spring will not crash or rumble when
the amplifier
is
moved or shaken.
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