The XAct Tone Solutions Atomic Overdrive pedal packs in plenty of gain and a great tone-shaping section to make for a killer pedal that sounds and responds like a cranked high-gain tube amp. Multiple, cascading gain stages produce tons of chunky drive and distortion that gets into "brown sound" territory at the top of the dial. The EQ section gives you musical bass and treble controls as well as a powerful midrange control with selectable frequencies, providing more tone-shaping ability than most amplifiers have.