BOSS Waza Craft is more than just a mod, it's a higher brand. So even things like the “技 WAZA CRAFT” logo on the footswitch, the silver plate and engraved serial number, the silver screw...every detail is important for the brand and it matters to us players too. Only BOSS can be on this level. With a founding design that build build on BOSS’s own trailblazing OD-1, the SD-1 aimed to replicate the tube amp drive sound with an asymmetrical clipping circuit, while adding an active tone knob to control the amount of high-end bite. Uniquely, while most distortion circuits of the time were based on fuzz, the SD-1 had high pick sensitivity and a frequency range tuned specially for the electric guitar. Not only was it used as a standalong overdrive, but guitarists in aggressive genres like hard rock and metal relied on the SD-1 to boost their already distorted amps. Excellent condition. Local cash, local meet up in Salt Lake & Davis County.