Brimstone Audio is a California-based builder of analog guitar and bass effects pedals, founded by David Beers. The company is best known for pioneering a dual-band distortion architecture that splits the signal into low and high frequencies and overdrives each band independently, an approach Beers has described as a way to approximate the layered guitar tones heard on records while preserving clarity.

The brand's debut pedal, the Crossover Distortion XD-1, introduced the dual-band concept with two cascaded MOSFET overdrive circuits, a sweepable active crossover, and a High/Low gain switch. The Crossover XD-2 expanded on that platform, and the BL-1 Basilisk brought a tube-driven variation of the same dual-band topology. The Ouroboros OB-1 applies the architecture to an effects loop, offering parallel blending and band-split routing for external pedals.

Brimstone Audio's pedals are built in the United States and have drawn attention from bass and guitar players looking for clean low end under heavy distortion, with coverage in Premier Guitar and Vintage Guitar magazine and active discussion threads on TalkBass and similar community forums.

Brimstone Audio has 4 products cataloged on Equipboard, including Distortion Effects Pedals and Switch Effects Pedals. Their gear is featured by 3 artists, with the strongest followings in Rock, Pop, and Metal. Notable users include Ben McKee, Jeff Matz, and Kevin Ray.