HAZ Laboratories Mu-Tron III+ Envelope Filter

!!Repair-Person's SPECIAL!!

This unit had been modded with a toggle switch and an LED indicator. It was in a rack with other pedals, not used as a stomp. The LED is not currently working. Unit sounds fantastic but creates some "clicking" sounds on some settings, the repair of these issues is beyond my capabilities, which is why its being listed as a "Repairman's Special" and priced accordingly.

• !!Thanks for looking!!

The MU-TRON IlI+ is a filter whose frequency is shifted by your instrument's volume (envelope). This filter has low-pass, band-pass, high-pass and notch outputs. The MODE switch selects which of these outputs is routed to the AMPLIFIER jack. The DEPTH control adjusts the amount of the instrument's signal which is used to shift the filter. The PEAK control changes the "Q" of the filter. A low setting of the PEAK control produces a filter with very subtle characteristics, whereas a high setting produces a more accentuated effect. The DRIVE switch determines which way the filter shifts in response to the instrument's volume (namely, UP or DOWN). The RANGE switch offers two bands of frequencies for the filter (namely, HIGH or LOW).