Dumble

Unmatched Tone

There are two inputs: a "normal" input and FET input where the signal from the guitar goes to a J-FET line level booster pre-amplifier before entering the first tube stage (originally intended for use with acoustic guitars and other instruments with low output levels).

The first tube is followed by a passive tonestack with adjustments for treble, middle, and bass. Typical switching options available in the different models include:

* Bright (bypasses the volume potentiometer with a capacitor to boost the high frequencies)