Endangered Audio Research is a small effects and synthesizer builder based in Asheville, North Carolina, founded in 2008 by Todd Kelley. The company shares its hometown with other notable gear makers like Moog and Blackout Effectors, and has built a reputation for unconventional, all-analog designs aimed at players and electronic musicians with experimental tastes.

The brand is best known for the AD4096 Analog Delay, a Maestro-inspired bucket-brigade pedal offering 40–400 ms of repeats with distinctive expand and infinity controls for self-oscillation and cathedral-like trails. Other releases include the Spectravibe, an all-analog multi-effect with tremolo, vibrato, overdrive, compression, auto-wah and ring modulation; and the Gristleizer, an analog filter/VCA effect — produced as both a stompbox and a Eurorack module — inspired by the device used by industrial pioneers Throbbing Gristle.

Design work skews toward hands-on, knob-driven controls rather than MIDI or tap-tempo features, and runs of certain models have been deliberately limited. The company has also been associated with charitable initiatives tied to youth music programs and forest conservation.

Endangered Audio Research has 4 products cataloged on Equipboard, including Delay Effects Pedals, Modular Synthesizers, and Univibe & Rotary Effects Pedals. Their gear is featured by 10 artists, with the strongest followings in Rock, Electronic, and Pop. Notable users include Justin Meldal-Johnsen, Gareth Liddiard, and cEvin Key.