ISP Technologies THETA 212 Combo - Manual (Page 6)

COMBO CLEAN CHANNEL
1. CLEAN CHANNEL ON LED
This led indicates when the CLEAN CHANNEL is active. NOTE: The CHANNEL SELECT
switch on the FOOTCONTROLLER switches between the CLEAN CHANNEL and DISTORT
CHANNEL. THE CLEAN can be selected by using either the FOOTCONTROLLER
CHANNEL SELECT switch or by pushing the CHANNEL SELECT switch on the from panel
of the Combo amplifier.
2. PRESENCE CONTROL
This control adjusts the amount of high frequency presence in the CLEAN channel. The
corner frequency of the PRESENCE control is set at 15Khz with a maximum if 15db of
boost.
3. BASS
This control adjusts the amount of boost or cut in the low frequency portion of the
spectrum of PREAMP1. The available BASS boost and cut range is +/-15 decibels.
4. MIDRANGE BOOST/CUT CONTROL
This control works in conjunction with the SWEEP frequency control 5. The MID and
SWEEP controls work together to provide a semi-parametric tone control. When the MID
control is set at 12:00 straight up there is no boost or cut in the MID frequency portion of
the spectrum. The graph below shows the response of the MID boost/cut and SWEEP
controls. The MID control allows +/- 12db of boost or cut to be applied at the frequency
determined by the SWEEP control.