ISP Technologies THETA Head - Manual (Page 5)

THETA CLEAN CHANNEL
1. CLEAN CHANNEL ON LED
This led indicates when the CLEAN CHANNEL is active. NOTE: The CHANNEL
SELECT switch on the THETA FOOTCONTROLLER switches between the CLEAN
CHANNEL and DISTORT CHANNEL. THE CLEAN can be selected by using either the
THETA FOOTCONTROLLER CHANNEL SELECT switch or by pushing the CHANNEL
SELECT switch on the from panel of the THETA 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.