Musitronics History :

Musitronics Corp. was founded in 1972 in Rosemont New Jersey, and operated until the sale of its Mu-Tron product line to A.R.P. in 1978. The original Mu-Tron products have since become collectors items.

This site provides information about Musitronics and the Mu-Tron products, as well as a forum for the free exchange of views and information between Mu-Tron enthusiasts.

This site is provided by Mike Beigel inventor of the original Mu-Tron III and principal developer of the Mu-Tron product line.

Mike presently operates Beigel Technology Corp. , Mu-FX and

Mu-FX products :
Mu-FX Tru-Tron 3x

Mu-FX was founded in 2013 in Encinitas, California by Mike Beigel. Mu-FX is dedicated to the modern all-analog refinement and re-issue of the classic Musitronics product line including the; Mu-Tron III, Octave Divider, Phaser, Bi-Phase and others.

The first Mu-FX product was introduced in 2013. Based on the original Mu-Tron III, the first and best envelope filter pedal ever, the newly developed Tru-Tron 3X retains all the "mojo" that made the original pedal so popular.

Electro Harmonix and Musitronics Team Up :

If you want the original sound and circuitry of the Mu-Tron III, please buy either a used vintage original Mu-Tron III (and NOT the so-called "Mu-Tron III plus" which is not a vintage original Mu-Tron III ).

Better yet, get my new MU-FX TRU-TRON 3X which has new features and better specs and retains all of the Mu-Tron III mojo.

Electro Harmonix, where history, quality and innovation collide. Electro Harmonix features the latest productions of the Mu-Tron legacy, the Q-Tron. For more than 30 years, they've been inspiring musicians with groundbreaking effect pedals, vacuum tubes and accessories.

Looking for the modern equivalent to the Mu-Tron?
A brief Mu-Tron history lesson..

Mu-Tron III

The Mu-Tron III by Musitronics Corp. first came out in 1972. Since 1996 the Q-Tron, developed by Electro Harmonix, had been the successor to the legacy which is the Mu-Tron. In early 1995 Mike Beigel was commissioned by Mike Mathews (owner of EHX) to reinvent the sound of Mu-Tron, today EHX still sells that sound as the Q-Tron. In 2013 the Mu-FX Tru-Tron 3X, designed and produced by Mike Beigel, became the true official successor to the Mu-Tron legacy.

1996 EHX Q-Tron

1998 EHX Q-Tron+

2000 EHX Mini Q-Tron

Since 1996 EHX has released several other units with roots tied to Mu-Tron. In 1998 the Q-Tron+ was released with technologies similar to the BSL below. In 2000 a Mini Q-Tron was developed similar to that of the original Mu-Tron.
Click on the pictures below to see ads and reviews for the Q-Tron: "The Envelope, Please," reprinted from the March 1998 issue of Guitar World and "Get Down, Get Funky," reprinted from the January 1998 issue of Guitar Shop.

(click each to enlarge)

In 2004 EHX released the highly anticipated studio quality Bi-Filter with roots deeply connected to that of the 1979 BSL Envelope Controlled Filter.

1979 BSL Envelope Controlled Filter

2004 EHX Bi-Filter

Be sure to click the EHX products above to visit their homepage. Sound clips are available featuring the products and your favorite artists!

Articles :



The Stomping Ground: Musitronics, Mu-Tron, and the Gizmotron by Chris Gill. Reprinted from Vintage Guitar Magazine September 1997, Volume 11 Number 12.

©2001-2014 Mike Beigel. All rights reserved.