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Combo master controls – ISP Technologies THETA 212 Combo User Manual

Page 9

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6. TREBLE CONTROL

The TREBLE control adjusts the boost or cut that is applied in the high frequency portion

of the spectrum of DISTORTION CHANNEL. The maximum TREBLE boost and cut range
is +/-15 decibels.

7. REVERB LEVEL CONTROL

The REVERB control adjusts the amount of digital reverb that is added when using the
DISTORTION channel. The digital REVERB in the COMBO amplifier has a bandwidth of
18KHz and also includes a digital implementation of the Decimator noise reduction to

ensure that the digital reverb has a dynamic range greater than 110db.

8. DECIMATOR NOISE REDUCTION

The DISTORTION channel DECIMATOR control adjusts the threshold of the CLEAN
channel noise reduction. The DECIMATOR noise reduction is a down low-level downward
expander incorporating ISP’s patent pending TIME VECTOR PROCESSING.
Setting the Decimator Noise Reduction System:

Setting the Decimator Threshold for proper use with the Distortion channel is easy if you
follow these instructions. Set the Decimator Threshold full counterclockwise. Adjust the
Distortion gain and Preamp2 gain as desired for your playing. Slowly increase the

Decimator Threshold until the background noise just disappears. This will be the best
possible setting for the Decimator. Increasing the Threshold beyond this point will cause
expansion to be more aggressive than desirable. Some experimentation may be required

to get the best possible Threshold setting.


9. LEVEL CONTROL

The LEVEL control adjusts the output level of the DISTORTION channel. NOTE: The final

output level is determined by the setting of the DISTORTION LEVEL and the MASTER
LEVEL CONTROL.

COMBO MASTER CONTROLS


1. LEVEL / MASTER OUTPUT LEVEL

This control determines the master output LEVEL of the THETA
COMBO guitar amplifier.


2. EFFECTS LEVEL CONTROL

This control adjusts the level of an externally connected effects
processor. NOTE: The loop must be turned on via the
FOOTCONTROLLER in order for the EFFECTS level to operate.

3. SOLO LEVEL

This control adjusts the amount of boost that will be applied to the output signal when

the FOOTCONTROLLER boost switch is activated. This control allows the user to switch
on and off via the FOOTCONTROLLER up to 6db of output level boost if desired for
soloing

4. DECIMATOR IN/OUT SWITCH

This master DECIMATOR IN / OUT switch activates both the CLEAN channel and
DISTORTION channel DECIMATOR noise reduction systems.