Electro Harmonix

Electro Harmonix is a company that makes electronic sound processors based in New York. They are most famous for a series of popular guitar effects pedals in 1970s and 1990s. The company was founded by Mike Matthews in 1968.

The first Electro Harmonix product was the Linear Power Booster in 1969. This massively boosted a guitar signal to provide gain by clipping the signal, dramatically changing the sound. The new device provided a raw distorted sound, full of sustain and harmonics. Several similar devices followed such as the Treble Booster and Bass Booster. The new devices were extremely popular with guitarists.