Boss SD-1 Super Overdrive Pedal (1982)

This pedal is in good condition with noticeable wear. We have fully tested this unit with both a battery and a vintage Boss ACA adaptor and it is 100% working as it should. The inside spring falls out easily when opening the pedal but is easy to set back into place. The rubber gasket for the thumb screw is missing, the footswitch still works fine and latches properly. 

This is the writeup on this pedal from the 1982 Boss pedal catalog

"The SD-1, like its predecessor, the OD-1 has been designed to duplicate the sound of an over-driven tube amplifier regardless of what amplifier it is used with. Unlike conventional distortion devices, the SD-1 is highly touch sensitive, and will respond to the guitarist's most delicate playing techniques.

Like the OD-1, the SD-1 features controls for Level and Overdrive, with the addition of a Tone control. The Level control is designed to compensate for level difference between the normal and effect signals. The Overdrive control operates the amount of the Overdrive effect from a very soft, subtle effect to one that is extremely hard.

The Tone control on the SD-1 is active and wide-ranging which allows the instrument to achieve many diverse effects. By changing the Tone control from its center position the SD-1 varies from not changing the guitar's tonality to radical alteration in either bass or treble direction.

Like all BOSS effects, both the SD-1 and PH-1R feature silent switching, LED on/off indicators, AC adapters, low noise operation with long range reliability.