Big Ear Pedals - Frank Overdrive Pedal FRANK is an LED-based, low-gain boost/overdrive utilizing a Burr-Brown op-amp to achieve a saturated amplifier-like drive without over-coloring your tone. With the Gain knob on it's lowest setting, FRANK can be used as a gorgeous and sparkly clean boost. Turn the gain a little past noon and FRANK will start to push your amp into a very natural and pleasant sounding breakup! An internal saturation trim pot allows you to choose between thick overdrive or a brighter British style attack. We have it set somewhere in the middle when we ship it out.