A manufacturer of stomp boxes and other effects devices for the electric guitar and bass. Originally founded in New York in 1968, EH is known for its somewhat esoteric effects with even stranger names. Some of the most famous are the Big Muff distortion pedal, Small Stone phaser and Memory Man analogue delay.

Labor union disagreements shut down the company in the 1980s, but it has recently been reborn under the Sovtek label, with many of the effects now being made in Russia.