HAZ Laboratories Mu-Tron III+ Envelope Filter Pedal

No longer available at zZounds
The HAZ Mu-Tron III+ offers players the famous envelope filter sound. With plenty of snap and wah, the HAZ Mu-Tron III+ sounds great.

MU-TRON III+TM translates the envelope or "volume profile" of every musical passage automatically into an easily-controlled, vowel-like sound, as you play. Use the MU-TRON III+TM 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+TM also functions as an automatic "wah" pedal. Full instructions are included, but you decide how far you want to go.


- Power: On-off switch.
- Low Battery/Sweep Limit Indicator: monitors the batteries' condition and aids in setting the depth control.
- Range switch: emphasizes high or low frequencies.
- Drive switch: shifts the filter up or down for two totally different effects.
- Mode switch: high-pass, band-pass, low-pass or notch filter characteristics, for accentuating different regions of audio band, allowing four distinct tonal images.
- Depth control: a sensitivity control for optimum operation from any musical source.
- Peak control: for varying filter "sharpness" from a subtle accentuation through a distinct vowel sound to high resolution filtering that "plays" individual overtones.
- Bypass footswitch: a true, passive bypass switch for routing the audio signal around the effect.

DIP-Switches (internal): permit you to customize your MU-TRON III+TM read more 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. read less

- Input: 1/4" gold-plated phone jack.
- Output: 1/4" gold-plated phone jack.
- DC Power: Jack for H'A'Z Model PS-1 power supply
- 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 (H'A'Z Model PS-1, for operation from 120 VAC 60 Hz)
- Weight: 3.25 lbs. without batteries
- Dimensions: 9 in. long X 5 in. wide X 3.125 in. high
- Components: Gold-plated stereo 1/4 in. 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
- Options: H'A'Z Model PS-1 Power Supply (120 VAC 60 Hz input)
- Specifications subject to change without notice.

For support or warranty questions, please contact the manufacturer:
Phone: 908-453-3300

Reviewers gave this product an overall rating of 5 out of 5 stars. (40 ratings)
Submitted June 27, 2013 by Scott M in Bayfield, WI

"Grease Box"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
The Mu-Tron III+ is slippery and greezy and loaded with the funk! It is built well so it stands up to the rigors of a gigging musician. To my ears there is little to no difference in the sounds of the vintage pedal and the newer one. Too, the newer pedal costs much less than the original, which means something to most of us. If there is a downside, it is the amount of real estate it takes up on a pedalboard. Small price to pay in the big picture. As a working bassist I feel like I have found the Holy Grail of envelope filters! I highly recommend this box.

Musical Background:

Working bassist for thirty-plus years

Musical Style:

Reggae, funk, rock, jazz
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