Rocktron O.D.B. Blues - Manual (Page 5)

Introduction continued....:
OUTPUT: Adjusts the final Output Gain 0db to +3dBu
TONE: Adjusts final High Frequency.
GERMANIUM DIODES:
+ When in applies clipping to the positive portion of
overdrive.
- When in applies clipping to the negative portion of
overdrive.
DRANGE: Determines how much soft knee clipping compression
is applied:
(Controls dynamic range [waveform excursion] of the assigned + or –
Germanium process)
DRIVE: Adjust the Overdrive gain (before Germanium diode
circuitry)
The footswitch on the O.D.B controls On/Off status (indicated by
the LED). This stomp box runs on a 9V Alkaline battery. You may
also use the Rocktron DC OnTap Universal Power Adaptor (sold
seperately).