Boss SD-1 Super Overdrive 1988

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Made in Taiwan in early 1988. The SD-1 Super Over Drive The SD-1 produces a wonderfully distorted or fully overdriven sound that responds to your playing style just as precisely as a tube amp. Asymmetrical overdrive circuits specially developed for the SD-1 enable an incredibly detailed and at the same time warm reproduction. This is the standard distortion for blues – unchanged in popularity since 1981! Main controls: DRIVE, TONE, LEVEL