Boss ST-2 Power Stack Driver. The BOSS ST-2 Power Stack delivers the punch and power of a full stacked amplifier in a compact stompbox. From vintage crunch to high-gain distortion, the ST-2 provides an authentic amp-like response, making it a versatile choice for rock and metal guitarists. At the heart of the ST-2 is the SOUND knob, which simultaneously adjusts both gain and sound character, letting you seamlessly transition from a classic overdriven tone to full-on distortion. The two-band EQ (Treble and Bass) offers additional tone shaping, making it easy to dial in your perfect sound. Features: Stacked Amp Power: Delivers the full sound of a cranked-up amp stack in a single pedal. SOUND Knob: Adjusts gain and character for a wide range of tones. Versatile Gain Range: From classic crunch to aggressive high-gain distortion. 2-Band EQ: Fine-tune your tone with Treble and Bass controls. Buffered Bypass: Maintains signal integrity when the pedal is off. Battery or Adapter Powered: Runs on a 9V battery or BOSS PSA-series AC adapter. With its amp-like tone, dynamic response, and easy-to-use controls, the BOSS ST-2 Power Stack is perfect for guitarists seeking powerful, high-gain distortion in a compact and reliable pedal.