Lone Wolf Audio is a boutique effects pedal builder based in Austin, Texas, founded by Joe Anastasio around 2013. Anastasio came up through the DIY hardcore and crust-punk scenes, previously operating under the names Braindead Audio Designs and Enormous Door before launching Lone Wolf Audio LLC. The shop hand-builds pedals in small runs and also operates under the shorter name Lone Wolf FX.

The company is best known for high-gain dirt boxes aimed at heavy guitar and bass players. Signature designs include the Left Hand Wrath, a HM-2-style Swedish death metal distortion; the Plague Rat, a take on the classic Rat distortion; the Iron Fist, a hybrid fuzz drawing on the Ram's Head Big Muff lineage; and The Outsider, a recreation of the rare Systech Harmonic Energizer. The catalog also extends into fuzz, modulation, and oddball circuits like The Viper, a chorus combined with a bit-crusher.

Lone Wolf Audio has built a following within the metal, sludge, doom, and hardcore communities, with users including Kurt Ballou of Converge, and members of Nails, Bloodbath, Darkthrone, Graves at Sea, and Young and in the Way. The brand is known for limited production runs, hand-painted enclosures, and a willingness to chase obscure vintage circuits rather than follow mainstream pedal trends.

Lone Wolf Audio has 15 products cataloged on Equipboard, including Distortion Effects Pedals, Overdrive Effects Pedals, and Fuzz Effects Pedals. Their gear is featured by 5 artists, with the strongest followings in Rock, Metal, and Electronic. Notable users include Matt Pike, Josh Elmore, and Dweezil Zappa.