THD UNIVALVE INSTRUCTION MANUAL
3
UniValve Controls
Front Panel
First, let’s go through the various control options on the front panel:
1. ROCK Input:
This jack fits a standard 1/4" mono shielded instrument cable. If you
use a stereo cable, the sleeve signal will be ignored. Do not use speaker cable into this
input. The ROCK input is the high gain input, meaning that both preamp gain stages will
be engaged in order to pass the hottest possible signal to the power section.
2. ROLL Input:
This jack fits a standard 1/4" mono shielded instrument cable. If you
use a stereo cable, the sleeve signal will be ignored. Do not use speaker cable into this
input. The ROLL input is the low gain input, meaning that the first preamp gain stage
will be bypassed.
NOTE:
You cannot plug into both inputs simultaneously or otherwise A/B between
inputs. Plugging into the Roll input will disable the Rock input.
3. Volume:
This knob controls the loudness of the amplifier. The higher the volume
knob setting, the more the tubes are engaged.
4. Treble:
This knob can be used to boost or cut the high frequency response of the
UniValve.
5. Bass:
This knob can be used to boost or cut the bass frequency response of the
UniValve.
6. Attitude:
The attitude knob determines how the driver tube responds to the signal, and
how it drives the power tube. If the Attitude knob is turned up, the UniValve will sound
edgier and more aggressive. With the Attitude knob turned down, the UniValve sounds
sweeter and more controlled.