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Vintage 1970s Mu‑Tron III Envelope Filter – Original & Fully WorkingA true funk icon. This Vintage 70’s Mu‑Tron III Envelope Filter is the real deal—fully tested, working exactly as it should, and delivering that unmistakable quack, sweep, and touch‑responsive magic that made the Mu‑Tron name legendary.This unit runs on two 9V batteries and also includes the rare original power supply, which is also fully functional. Whether you’re chasing classic Jerry tones, deep Bootsy funk, or experimental filter textures, this pedal nails it with authority.ConditionFully tested and 100% workingIncludes the original Mu‑Tron power supply (hard to find and fully functional)Cosmetically very good for its age with normal vintage wear (see photos)All switches, knobs, and controls operate smoothlySounds incredible—rich, expressive, and unmistakably Mu‑TronWhy Players Love ItThe Mu‑Tron III isn’t just another envelope filter—it’s the envelope filter. Its dynamic response, musical sweep, and organic feel remain unmatched. Vintage units like this are getting harder to find in clean, fully working condition, especially with the original power supply included.We are a brick‑and‑mortar music shop with 150+ guitars in stock, plus a curated selection of vintage pedals and amps in store and on our social media. Buy with confidence from a real store that knows and loves gear.