Distortion
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The 1978–1981 Boss DS-1 "long dash" (silver screw, black label) is the earliest, most sought-after version, featuring a "DS-1" logo with a long dash (—) rather than a short one, a silver battery screw, and a black label "Made in Japan". Known for a warmer, smoother, fuzz-like, and "in-your-face" distortion, these early units typically utilize the desirable TA7136AP op-amp chip.

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