With the release of the OD-1 in 1977, BOSS had inadvertently created an entirely new breed of stompbox - offering a natural overdrive in a compact pedal form to guitarists for the first time in history. Oozing with rich even-order harmonics, the unique asymmetrical clipping circuit offered a faithful replication of the gratifying sound and feel of a driven tube amp - but at safe listening levels. Four years later, this iconic design evolved into the more flexible SD-1, which offered an active tone control for fine tuning the treble response, as well as subtle circuit tweaks to deliver more low-end body.
Features
Genre-defining BOSS overdrive sound
Unique asymmetrical clipping circuit produces tube-like overdrive characteristics
Mild-to-moderate drive tones with focused midrange and tight low end
Ideal for use with clean and slightly driven amps
Also works great for bringing tightness and definition to high-gain amp tones
Stacks well with boost, overdrive, and distortion pedals


