ST-2 Power Stack

The Boss ST-2 Power Stack is a distortion pedal designed to recreate the sound and response of a cranked British-style amplifier stack. Developed using Boss's COSM modeling technology, it covers a wide range of gain levels, from classic rock crunch to modern high-gain distortion. Its controls include Level, Bass, Treble, and Sound. The Sound control adjusts both gain and voicing, allowing the pedal to move from lower-gain vintage amp tones to heavily saturated stack-style distortion. Independent Bass and Treble controls provide additional tone shaping to suit different guitars and amplifiers.