HAZ Laboratories Mu-Tron III+


  • Mode (LP/BP/LP)
    High-pass, band-pass, low-pass or notch filter characteristics, for accentuating different regions of audio band, allowing four distinct tonal images.
  • Peak
    For varying filter "sharpness" from a subtle accentuation through a distinct vowel sound to high resolution filtering that "plays" individual overtones.
  • Depth
    A sensitivity control for optimum operation from any musical source.
  • Range (Low/High)
    Emphasizes high or low frequencies.
  • Drive (Down/Up)
    Shifts the filter up or down for two totally different effects.
  • Power (Off/On)
    Switches the power on or off :)
  • Internal Dip-Switches
    Permit you to customize your MU-TRON III+TM to highlight your instrument and playing style.
    • Two switches tailor the high and low frequency ranges.
    • Three switches control the way the MU-TRON III+TM follows the dynamics of your instrument.
    • The last switch allows the Low battery L.E.D. to double as a sweep limit indicator.


warning by Mike Beigel, Musitronics founder

  • This is NOT a reissue of the original Musitronics Mu-Tron III!
  • It does NOT have the original circuitry (it uses digital sound processing)
  • It does NOT benefit the Mu-Tron inventors or Musitronics company founders


HAZ Laboratories

MU-TRON III+ translates the envelope or "volume profile" of every musical passage,... automatically... into an easily-controlled, vowel-like sound, as you play.

Use MU-TRON III+ to create a variety of synthesizer sounds with most electrified instruments: guitar, bass, keyboards, drums, flute, saxophone, brasses, .... even microphone.

The sharper your attack and the more percussive your instrument, the wilder your sound will be.

Besides providing that inverted "snap" (perfect for funky bass), MU-TRON III+ also functions as an automatic "wah" pedal. Full instructions are included, but you decide how far you want to go.

Most recent forum threads


  • Input Impedance
    Greater than 60K ohms (20 - 20 kHz).
  • Output Impedance
    Less than 2.6K ohms (20 - 20 kHz).
  • Maximum Undistorted Output Signal
    10V peak-to-peak.
  • Power Supply
    2 9-Volt batteries (not included) and/or optional power supply
  • Weight
    3.25 lbs. without batteries.
  • Dimensions
    9" long X 5" wide X 3.125" high.
  • Components
    Gold-plated stereo 1/4" jacks, 1% metal-film resistors, state of the art surface mount technology for highest reliability.
  • Construction
    Heavy-gage steel bottom with baked-on industrial enamel finish. Heavy-gage aluminum front panel.
  • Quality Control
    Each unit is calibrated, 100% tested, and played.
mutron III+, mutron 3+, mu-tron 3+, mutronIII+, mu-tronIII+

Where to find one?

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