Musitronics Mu-Tron III


The Mu-Tron III is a classic envelope filter but like most vintage effects it is missing the amenities that professional guitarists demand from their rig. The Mu-Tron runs on two 9V batteries or a specialty 3-pin power supply. The 9V Inverter Mod installs a voltage inversion circuit and a "Boss style" DC jack so you can run the pedal off of a standard 9V adapter or a 9V battery. It does this by replicating the -9V power that the second battery puts out. The rest of the circuitry– especially the audio path– is left 100% original and the pedal can be converted back to stock with minimal work if ever needed.

A significant problem with the Mu-Tron III is the Gain control. It adjusts the volume of the pedal when bypassed, the volume when activated, and also controls how wide the filter opens. This can be problematic because it may be difficult to set the pedal's bypassed volume to the same volume as if the pedal were never plugged in. This can lead to unintentionally overloading other devices in your signal chain. The true bypass mod allows the signal to go from the input jack to the output jack without any change in tone (or volume). More info on true bypass and pricing can be found here on the True Bypass page.

In addition a sensitivity knob is installed so you can increase the gain to drive just the filter without boosting the overall volume of the effect. The sensitivity knob is installed on the front face above the Range switch. You can also choose to have a status LED to light up when the pedal is engaged.