Trim pot sets the gain of the compressor's pre-amplifier.
Use this for level matching between the effected and unaffected signal. Volume increases and decreases the output volume of the Compulator. Please note that the Compulators max gain is 26dB (see Trim Pot) so in some circumstances if your instrument is very hot you could achieve less than unity gain if you turn up the compress knob too much. Turning this clock wise will give you up to 30dB of gain reduction (depending on input gain). Compress affects the amount of gain reduction (compression) of the input signal. On the side there is a trim pot to set the overall gain of the unit. There are two controls on the unit: compress and volume, plus a foot switch to bypass the effect, and an LED to indicate effect operation. There are two inputs on the front side of the unit: a 1/4" input jack on the right and a 1/4" output jack on the left with a battery-ground switch on the input jack. The sound of classic studio optical compression of the 60's and 70's at your feet! The first compressor pedal not to suck the life out of your tone. On the rare occasion that the pedal is not in stock, it can take up to 5 working days to ship out. Our pedals are usually in stock and ship within 48 hours.