Boss SD-1 Super Overdrive Modifications

Push your SD-1 into thick, crunchy British breakup. This Fromel kit keeps all the warm overdrive character the SD-1 is loved for, then adds thick, crunchy Marshall-style grind on top. It also cleans up beautifully — responding far better to your picking dynamics and really sizzling when you dig in.

Going a step further than every other kit out there, this one replaces virtually every capacitor in the signal path with high-quality audio-grade caps, and adds vintage 1N34A germanium diodes, a new op-amp, and a water-clear bright LED. The result: lower noise and more articulate tone. Upgraded power-supply caps let you run it at up to 18V. (Kit only — no pedal included.)

Will it fit my pedal? This kit works on through-hole SD-1s only. Boss began using surface-mount (SMD) boards on some pedals in 2017, and this kit will not fit those — check the compatibility image in the listing before ordering.

Which option should I order?

• Supreme Kit — all the parts plus detailed photo instructions. An easy project (about half an hour) with basic soldering skills.
• Have us install — send us your pedal and we'll do it for you.

Hear it

Installing the kit yourself voids the pedal's warranty and is done at your own risk — but with basic soldering skills and the included instructions, it's an easy project.