That’s right, it’s all tube circuitry here, no IC’s, no transistors, no tubes that are "just for looks" – this is the real thing!! This rugged pedal is built with the same exacting care and high quality that SOLDANO products are well known for. Two 12AX7 tubes operating at "real amp" plate voltages provide stable high gain amplification and hot output levels to get even the most mild mannered amp to scream! The SUPERCHARGER G.T.O.™ can be used both as a line driver and an overdrive pedal. It has three easy-to-use controls: Gain, Tone, and Output. Turning down the Gain and cranking up the Output delivers a clean, hot signal to the input of your amp, allowing you to overdrive your amp’s own preamp. Cranking up the Gain and backing off the Output sends a shot of pure SOLDANO overdrive to the input of your amp or mixing board, giving it truly remarkable tone and sustain. If you’re looking for true Hi-Performance in an overdrive pedal, ignore the rest and buy the best – SUPERCHARGER G.T.O.™