Big Tone Music Brewery (BTMB) is a boutique guitar effects pedal company founded and operated by Keith Vonderhulls in Richland, Washington. It serves as the hand-built, premium sister imprint to Vonderhulls' better-known DIY kit brand Build Your Own Clone (BYOC), focusing on finished pedals assembled by hand in the United States using through-hole construction and, where appropriate, NOS and vintage components.

The company's output centers on overdrive, distortion, fuzz, boost, and modulation circuits, with a stated preference for reworking classic designs rather than releasing straight clones. Notable models include the Royal Beaver (a Big Muff-style fuzz), the MOSFET Overdrive & Boost, the Quad Boost, the Maggie, the Sonnet 149, and the Wet Dream vibrato. BTMB has also produced an EQ'd Vintage Series — limited-run pedals that pair faithful vintage circuit replicas with a three-band EQ and parametric mids, covering Big Muff, Fuzz Face, Tube Screamer, Rat, Klon, DOD 250, and Bluesbreaker-style voicings.

Construction details commonly highlighted across the line include panel-mounted Neutrik jacks, true mechanical bypass switching, and fully hand-soldered wiring. The brand is generally discussed in pedal-enthusiast circles as an under-the-radar builder, with small production runs and serial-numbered units placing it closer to a boutique operation than a mass-market manufacturer.

Big Tone Music Brewery has 6 products cataloged on Equipboard, including Overdrive Effects Pedals, Distortion Effects Pedals, and Vibrato Effects Pedals. Their gear is featured by 7 artists, with the strongest followings in Rock, Folk, World, & Country, and Hip Hop. Notable users include J Mascis, Kurt Vile, and Nick O'Malley.