9
Tremolo (Rate & Depth)
The Imperial’s tremolo circuit is a modified form of the old-fashioned “bias modulation”
tremolo circuit. This circuit achieves the tremolo effect by varying the bias of the
output tubes. This type of tremolo was used in all Tone King amps going back to 1993.
However, the Imperial MK II uses a modified form of this circuit which virtually
eliminates the “thumping” and other sonic effects that are typical for this type of effect.
This is the same circuit which was used on the 20
th
Anniversary Imperial.
This type of tremolo circuit gives you a nicely rounded effect, but it is quite subtle when
compared to an opto-coupler tremolo (as would be found in, for example, a Fender Twin
Reverb).
The “Depth” control varies the intensity of the modulation effect, and the “Rate” knob
controls the speed of the effect.
If the footswitch is not being used, then the tremolo circuit is active all the time, so you
will need to turn the “Depth” knob all the way down if you do not wish to use tremolo.
When the footswitch is plugged in, you can turn the tremolo on and off with the
footswitch. An LED shows the status of the effect (LED on = tremolo on)
2. Back Panel Controls
AC Power
Always use a grounded AC cord, and make sure that a proper ground connection is
supplied to the amp. Never attempt to lift or defeat the ground connection to the amp.
Summary of Contents for Imperial MK II
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