Offer Details

​Up for sale is a vintage 1970s big-box Electro-Harmonix Zipper Envelope Follower in excellent internal condition. If you are looking for that thick, classic analog funk filter and want a unit that is actually ready to plug in and record without scratchy pots or signal dropouts, this is the one.​Condition :​​Cosmetics: Shows classic vintage wear on the chassis, but the graphics are clear and legible.​The Knob: The unit is missing the original plastic "hockey puck" pointer knob for the Range control. The metal potentiometer shaft is completely intact, unbent, and turns perfectly. You can easily dial in your settings by hand, slide a temporary generic knob on, or source a vintage replacement if you are a collector. The price has been heavily adjusted downward to account for this.​Why the Zipper?Unlike standard wahs or basic filters, the Zipper features a dedicated LP (Low Pass) and BP (Band Pass) switch alongside the legendary Range and Attack controls. It reacts incredibly dynamically to your playing dynamics, making it an absolute secret weapon for bass, guitar, or synths.​Power Requirements: 9V or adapter.​Shipping: Promptly packaged and shipped fully insured with tracking.​Item is sold as described. Photos show the exact unit you will receive. Shoot me a message if you have any questions!