Electro-Harmonix is a legendary NYC-based audio equipment manufacturer founded in 1968, renowned for its diverse line of guitar effects pedals and vacuum tubes.
Founded in 1968 by Mike Matthews in New York City, Electro-Harmonix (EHX) became a cornerstone of the music industry by pioneering affordable, high-quality electronic audio processors. Best known for iconic guitar effects pedals like the Big Muff Pi and the Small Stone Phase Shifter, the company played a pivotal role in defining the sound of rock and roll in the 1970s and continues to innovate today.
Operating under the parent company New Sensor Corporation, Electro-Harmonix manufactures a vast range of pedals, amplifiers, and vacuum tubes used by musicians worldwide. From the rhythmic pulses of the Memory Man delay to the distinct fuzz of the Big Muff, EHX products are staples on pedalboards across genres. The company remains committed to analog heritage while embracing digital technology in its modern reverb and polyphonic octave generators.
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Common questions about manuals, registration, and support for this brand.
Most standard EHX pedals require a 9VDC power supply with a center-negative polarity. Always check the specific voltage and current requirements (mA) listed in your user manual to avoid damaging the unit.
You can register your new product online at the official Electro-Harmonix product registration page found on their website.
For many EHX pedals, you must remove the screws on the bottom plate to access the battery compartment. Ensure you do not touch the circuit board while the plate is off to prevent damage.
Contact EHX customer support at info@ehx.com to obtain a Return Authorization Number (RA#) before sending your unit in for service. Proof of purchase is required for warranty repairs.