Mu-Tron Micro-Tron IV — Envelope Filter (rare on the used market!)

Up for sale is a Mu-Tron Micro-Tron IV in excellent condition, fully working and sounding glorious. This is currently one of the very few used Micro-Tron IVs available anywhere — they rarely come up for sale.

The Micro-Tron IV is the latest and most refined incarnation of the legendary Mu-Tron III envelope filter, built by Mu-Tron/Musitronics with their MU Opto-Mod technology. Compared to the Micro-Tron III, the IV adds two significant upgrades:

• OUTPUT level control — proper gain staging for any rig

• CV input — plug in an expression pedal (e.g. Dunlop DVP4) with no modification, plus footswitchable UP/DOWN drive

Powered by standard 9V DC. It sounds fantastic on guitar, bass, keys, horns — anything you feed it. Designed for passive-level signals, it responds beautifully to picking dynamics.

Condition: excellent — fully functional, no issues. Please see photos for cosmetic details.

Reason for sale: rig streamlining, nothing wrong with the pedal.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed16 hours ago
ConditionExcellent (Used)
Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more
Brand
Model
  • Micro-Tron IV
Finish
  • Silver
Categories
Year
  • 2026
Made In
  • United States
Pedal Format
  • Standard

Product safety information may be available here.

Pan Outlet

Bologna, Italy
Joined Reverb:2026

Reverb Protection

Simple Returns, Secure Transactions, Human Support

Learn more

Secure Checkout

Promoted similar listings













Product reviews

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Oops, looks like you forgot something. Please check the fields highlighted in red.