Rothwell Audio Products is a UK manufacturer based in Bolton, Lancashire, founded by Andrew Rothwell. The company was incorporated in 2003 to produce hi-fi electronics — primarily vinyl-replay gear such as the Rialto phono stage, MC step-up transformers, and the Auriga valve pre-amplifier — drawing on Rothwell's prior engineering experience at British Aerospace and Alphason Designs. Around 2007 the company expanded into boutique guitar effects, with all pedals designed and hand-assembled in the UK.

On the guitar side, Rothwell is best known for a small line of analog overdrive and distortion pedals built into polished, engraved enclosures. The range includes the Hellbender overdrive, the Heartbreaker overdrive/boost (notable for a high/low gain switch that allows it to function as a near-clean boost), and the Switchblade three-stage distortion. The brand also makes guitar-oriented compressors and in-line attenuators that connect between guitar and amp to tame output without altering tone.

Rothwell occupies a niche as a small, owner-operated British boutique builder, with products positioned alongside other UK hand-built effects rather than mass-produced offerings. Its dual identity — serious audiophile hi-fi alongside a focused range of guitar effects — is unusual in the pedal market and reflects Andrew Rothwell's background as both an electronics engineer and a guitarist.

Rothwell has 3 products cataloged on Equipboard, including Overdrive Effects Pedals, Distortion Effects Pedals, and Compressor Effects Pedals. Their gear is featured by 2 artists, with the strongest followings in Rock, Folk, World, & Country, and Blues. Notable users include James Dean Bradfield and Gwyn Ashton.