The Boss SD-2 Dual Overdrive was one of the more short-lived pedals that was part of the first post-Japan production run out of Taiwan. This pedal had two separate shapeable overdrive circuits.
This thing has two channels right? Well, the crunch mode isn't very inspiring at all, infact i want to mod it. It's kinda harsh and buzzy no matter how i tweak it The lead side worth the climb. This is certanly one of the most powerful marshall sounding lead distortions i've ever heard, and i've heard many.