Tremdriver is a high headroom preamp that makes any rig sound bigger and better combined with a foot-switchable harmonic tremolo that gives you amazingly lush and swirly pulses. Designed to run towards the end of your pedal chain, the Drive and Output controls puts you in clean boost heaven. Then switch on the harmonic tremolo mode, adjust the Speed from a slow pulse to a quick quiver, and prepare to be mesmerized for hours!