Kustom Defender V50 Owner's Manual - page 11
Treble EQ section (8). For a heavier, more distorted sound, set the Mid-
dle lower. For more of a vintage-style, cleaner sound, set the Middle
higher.
8) Treble: This passive EQ adjusts the high frequency equalization of
the amplifier, but also interacts with the Bass and Middle controls as
follows: As the Treble is increased, the Bass automatically decreases
and the Middle slides down in frequency. Conversely, if the Treble is
decreased, the Bass automatically increases and the Middle slides up in
frequency. This interaction is typical of vintage-style passive EQ, and is
responsible for the increased effectiveness of such a simple system.
9) Reverb: Reverb controls the amount of the reverberation effect in the
amplifier. This effect is created by an authentic spring reverb pan and
sounds essentially like playing the amp in a large room. The Reverb can
be defeated by turning the control fully counter-clockwise.
10) Presence: The Presence control operates in the power amp section
of the amp and adds high frequencies to the tone. Higher settings will
provide more bite and help you cut through the mix.
11) Boost: The Boost knob controls the amount of footswitchable boost
in the power amp, and is particularly useful for solos. It will provide up
to 10dB of “Master Volume” boost. The tone is optimized to increase
the volume without sacrificing too much headroom in the power amp,
so the resulting solo cuts through. (Note: Boost is active if the foot-
switch is unplugged.)
12) Jeweled Pilot Light: When lit, it indicates that the amplifier’s power
switch is in the ON position.
13) Standby: This allows the amplifier to be powered up, but with the
tubes in a non-operational mode. The Standby can be used instead of
the power switch between performance sets, since it allows the amp to
“shut down” while keeping the tubes warm and ready to go. It’s also
best to power the amp up with this switch set to the downward “Off”
position until the tubes have had a few minutes to warm up, although
modern tubes are more tolerant of this.
14) ON Power: Provides AC power to the amplifier when in the upward
“On” position.
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