The ST-2 Power Stack Guitar Pedal from BOSS delivers everything from fat crunch to high-gain distortion, yielding a sound reminiscent of a tube amp with stacked speaker cabinets. The SOUND knob simultaneously blends gain amount and sound character, so you can quickly dial-up anything from vintage crunch and punchy drive to full-on distortion. To add further detail to your tone, simply tweak the onboard 2-band EQ to taste.