{"id":8961673265385,"title":"Electro-Harmonix Zipper Envelope Follower w\/ Box 1979","handle":"electro-harmonix-vintage-envelope-follower-1979","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eExalted American effect pedal manufacturer, Electro‑Harmonix introduced the Zipper onto an unsuspecting world in early 1977 and ended production in early 1980. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eElectro‑Harmonix was on quite a roll with envelope followers, as they also produced the smaller and simpler models, the Doctor Q and Y‑Triggered Filter (and later, the fabled Q‑Tron from the 1990s). The Zipper was the largest and most flexible of the original models, allowing greater fine tuning of the analog filter’s response to an input signal. The effect was designed for use with guitar, bass or keyboard, hence the low pass\/band pass options. At its simplest, envelope filters are often referred to as ‘auto wahs’, frequently used to produce funky wah effects without the need for constant foot control. However, as the threshold of the filter is responsive to signal strength, the Zipper is capable of more subtle analog synth‑like sound effects. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne interesting aspect of the pedal, there must be a battery in the unit even if you chose to use the power jack. It actually states this in the m\u003c\/span\u003eanuel. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Excellent, this is one of the cleanest vintage pedals I've seen in a long time. It's been recently serviced and my tech put the labels on the power port and made a note on the pedal about the need for a battery. They're just stickers and can be removed. The box and manual are included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"wp-block-list\"\u003e\n\u003cli\u003eThe ‘Range’ knob controls the frequency range over which the filter sweeps\u003c\/li\u003e\n\u003cli\u003eThe ‘Q’ knob controls the intensity of the filter relative to signal strength\u003c\/li\u003e\n\u003cli\u003eThe ‘Attack’ toggle switch actually controls the speed at which the filter sweep returns after being triggered – ‘1’ moderately fast and ‘2’ rapid\u003c\/li\u003e\n\u003cli\u003eThe ‘LP\/BP’ EQ slide switch attenuates high frequencies (Low Pass) or both high and low frequencies (Band Pass)\u003c\/li\u003e\n\u003cli\u003eStandard footswitch turns the effect on and off\u003c\/li\u003e\n\u003cli\u003eStandard ¼” input and output mono jack sockets\u003c\/li\u003e\n\u003cli\u003eNo LED status indicator\u003c\/li\u003e\n\u003cli\u003e9V DC power supply input or 9V battery\u003c\/li\u003e\n\u003cli\u003eNo battery compartment in the base of the unit\u003c\/li\u003e\n\u003cli\u003ePhillips screws on the top of the pedal\u003c\/li\u003e\n\u003cli\u003eBox and paperwork included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","published_at":"2025-06-18T01:11:08-04:00","created_at":"2025-06-18T01:01:02-04:00","vendor":"Electro-Harmonix","type":"Envelope Filter","tags":["Effects","EHX Zipper","Electro-Harmonix","Electro-Harmonix Zipper","Envelope Filter","Envelope Filter Pedal","Envelope Follower","reverbsync-condition:excellent","Vintage","Vintage Collection","Vintage Effects","Zipper Envelope Follower"],"price":49999,"price_min":49999,"price_max":49999,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":48499477610729,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"EXH-ZIPPER","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Electro-Harmonix Zipper Envelope Follower w\/ Box 1979","public_title":null,"options":["Default Title"],"price":49999,"weight":1814,"compare_at_price":null,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-1.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-2.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-3.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-4.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-5.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-6.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-7.jpg?v=1750223230","\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-8.jpg?v=1750223230"],"featured_image":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-1.jpg?v=1750223230","options":["Title"],"media":[{"alt":null,"id":37372257239273,"position":1,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-1.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-1.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257272041,"position":2,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-2.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-2.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257304809,"position":3,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-3.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-3.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257337577,"position":4,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-4.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-4.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257370345,"position":5,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-5.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-5.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257403113,"position":6,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-6.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-6.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257435881,"position":7,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-7.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-7.jpg?v=1750223230","width":1400},{"alt":null,"id":37372257468649,"position":8,"preview_image":{"aspect_ratio":1.226,"height":1142,"width":1400,"src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-8.jpg?v=1750223230"},"aspect_ratio":1.226,"height":1142,"media_type":"image","src":"\/\/megatonemusic.com\/cdn\/shop\/files\/Electro-Harmonix-Vintage-Zipper-Envelope-Filter-1979-Image-8.jpg?v=1750223230","width":1400}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eExalted American effect pedal manufacturer, Electro‑Harmonix introduced the Zipper onto an unsuspecting world in early 1977 and ended production in early 1980. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eElectro‑Harmonix was on quite a roll with envelope followers, as they also produced the smaller and simpler models, the Doctor Q and Y‑Triggered Filter (and later, the fabled Q‑Tron from the 1990s). The Zipper was the largest and most flexible of the original models, allowing greater fine tuning of the analog filter’s response to an input signal. The effect was designed for use with guitar, bass or keyboard, hence the low pass\/band pass options. At its simplest, envelope filters are often referred to as ‘auto wahs’, frequently used to produce funky wah effects without the need for constant foot control. However, as the threshold of the filter is responsive to signal strength, the Zipper is capable of more subtle analog synth‑like sound effects. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOne interesting aspect of the pedal, there must be a battery in the unit even if you chose to use the power jack. It actually states this in the m\u003c\/span\u003eanuel. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e Excellent, this is one of the cleanest vintage pedals I've seen in a long time. It's been recently serviced and my tech put the labels on the power port and made a note on the pedal about the need for a battery. They're just stickers and can be removed. The box and manual are included.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"wp-block-list\"\u003e\n\u003cli\u003eThe ‘Range’ knob controls the frequency range over which the filter sweeps\u003c\/li\u003e\n\u003cli\u003eThe ‘Q’ knob controls the intensity of the filter relative to signal strength\u003c\/li\u003e\n\u003cli\u003eThe ‘Attack’ toggle switch actually controls the speed at which the filter sweep returns after being triggered – ‘1’ moderately fast and ‘2’ rapid\u003c\/li\u003e\n\u003cli\u003eThe ‘LP\/BP’ EQ slide switch attenuates high frequencies (Low Pass) or both high and low frequencies (Band Pass)\u003c\/li\u003e\n\u003cli\u003eStandard footswitch turns the effect on and off\u003c\/li\u003e\n\u003cli\u003eStandard ¼” input and output mono jack sockets\u003c\/li\u003e\n\u003cli\u003eNo LED status indicator\u003c\/li\u003e\n\u003cli\u003e9V DC power supply input or 9V battery\u003c\/li\u003e\n\u003cli\u003eNo battery compartment in the base of the unit\u003c\/li\u003e\n\u003cli\u003ePhillips screws on the top of the pedal\u003c\/li\u003e\n\u003cli\u003eBox and paperwork included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e"}