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FOOT PEDAL 5-pin DIN female jack is used to connect the foot pedal to the amplifier. Use the foot pedal to control the
OVERDRIVE and PREAMP BOOST modes. Red LED indicates OVERDRIVE, and Green LED indicates PREAMP BOOST.
OD TRIM control. This control adjusts the signal strength sent to the first tube stable in the OVERDRIVE channel. Lower
settings yield more touch-sensitive, lower gain sounds. Higher settings are more compressed, higher gain, and more
harmonically complex. Start with the control between 10:00 and 12:00 (clock face), but experiment for your own ideal tone!
EFFECTS LOOP SEND ¼" instrument jack can be used to directly interface the preamp of the OTS, thereby bypassing the
power amplifier and using the OTS as a preamp. Conversely, this is usually used as the SEND of the effects loop. Plug the
input of your effects unit, or interface device (ex – C-lator, Klein-ulator) into this jack using ¼" instrument cable. The effects
loop in the OTS amplifiers are all passive, like the originals.
EFFECTS LOOP RETURN ¼" instrument jack can be used to directly interface the power amp of the OTS, thereby bypassing
the preamp and using the amplifier as a power amplifier. Conversely, this is usually used as the RETURN of the effects loop.
Plug the output of your effects unit, or interface device (ex – C-lator, Klein-ulator) into this jack using ¼" instrument cable. The
effects loop in the OTS amplifiers are all passive, like the originals.
IMPEDANCE three-way rotary selector. Set this selector to the position that matches the impedance of your speaker cabinet.
NOTE – if you are using two speaker cabinets in parallel (ex – two 16 Ohm cabinets), set the impedance selector to half that of
a single cabinet (in this case, 8 Ohms).
SPEAKERS EXTENSION AND MAIN ¼" speaker cable jacks. Use a ¼" speaker cable to connect your speaker cabinet to the
amplifier using these jacks. If you use one speaker cabinet, use the jack labeled MAIN. If you want to run two cabinets in
parallel, connect the second cabinet to the amplifier using the jack labeled EXTENSION.
NOTE – never turn your amplifier to OPERATE mode without connecting the amplifier to a speaker cabinet or suitable dummy
load! Failing to do so may damage your amplifier!
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