ISP Technologies THETA PRE AMP PEDAL - Manual (Page 5)

output of the Distortion circuit is followed by a Level contol circuit. The level circuit
provides the output level control for both the PREAMP circuit and the DISTORT circuit.
This allow you to balance the level of both the PREAMP and the DISTORT circuit in
relation to each other. The second advantage of this design is that when using the
PREAMP circuit to overdrive the DISTORT circuit the PREAMP output level will not reduce
the impact of the full gain available to overdrive the DISTORT circuit. In this confiuration
you can use the gain of the PREAMP to full advantage to overdrive the DISTORT circuit
and still have the ability to balance the output levels between the individual PREAMP and
DISTORT circuits when used individually. The output of the Level block feeds the input
of the DECIMATOR G-String II noise reduction circuit. As can be seen, the level
dectection and control circuit of the Decimator is connected directly to the input buffer
allowing direct instrument tracking and also allowing the Threshold setting to be based
on the noise of the instrument before any EQ, gain or distortion is applied. The actual
noise reduction circuit is the last circuit in the signal path allowing a single threshold
setting for all functions of the THETA pedal. This means you can switch from the clean
PREAMP to low gain and even high gain plus ultimate gain with both the PREAMP and
DISTORT circuit in use and still eliminate all of the noise at the output and all with one
threshold setting.
PREAMP CIRCUIT
The PREAMP is a clean preamp that can be used as your clean channel and or a front end
Preamp with Gain to overdrive the DISTORT circuit for incredible sustain and gain.
PREAMP ON LED
This led located above the PREAMP FOOTSWITCH indicates when the clean PREAMP
is active and in the signal path.