Introduced in 1981, the BOSS SD-1 Super Overdrive has become a trusted favorite across nearly every musical genre. Its asymmetrical clipping circuit produces smooth, tube-like overdrive with a focused midrange, tight low end, and rich harmonic character that helps the guitar sit naturally in the mix.
 
The SD-1 delivers everything from lightly driven rhythm tones to warm, singing leads through its responsive Drive, Tone, and Level controls. It pairs beautifully with clean or slightly overdriven amplifiers and also works as a boost to add definition to high-gain amps or other drive pedals.