BOSS SD-1 Super OverDrive Guitar Effects Pedal

The legendary BOSS Super OverDrive SD-1 guitar effects pedal has been delivering genre-defining overdrive tones for over 40 years. This hardworking stompbox uses BOSS's proprietary asymmetrical clipping circuit to produce rich, creamy overdrive reminiscent of a cranked tube amp. With fully analog circuitry and controls for Level, Tone and Drive, the SD-1 makes it simple to dial in everything from mild breakup to singing leads.

Asymmetrical Clipping for Authentic Tube-Amp Tone

Boss pioneered the overdrive pedal category with 1977's OD-1, which used an innovative asymmetrical clipping circuit to mimic the sound of an overdriven tube amp. The SD-1 evolved from this revolutionary design, enhancing it with an active tone control and low-end boost for full, musical overdrive. This asymmetric circuit produces predominantly even-order harmonics, resulting in a tone that's naturally warm, smooth, and responsive.

Versatile Controls for Any Playing Style

The SD-1's Level, Tone and Drive controls make it easy to tailor your overdrive tone. Level adjusts the pedal's output volume, allowing you to boost your signal without changing its character. Tone shapes the overall tone by adjusting the high-frequency response. And Drive controls the amount of gain and distortion. Whether you prefer mild breakup, creamy overdrive or searing lead tones, the SD-1 delivers.

A Pedalboard Essential for Any Genre

The SD-1's organic, amp-like overdrive has made it a staple for guitarists in all genres of music. Its dynamic response and touch-sensitive drive are perfect for rock, blues and classic tones, while the Tone knob provides enough flexibility for country, jazz and more. The SD-1 also works great as a booster for higher-gain amps and pedals, tightening the bass response and focusing the midrange. For over 40 years, the SD-1 has been the overdrive pedal that does it all and is now available at Guitar Center.