{"type":"firestarter.listing","listing":{"id":"lst_p0CsvOGy","product_name":"SJY Zeph Open-Back Planar Magnetic Headphones","category":"Headphone","description":"\nNote: This product has a 1-2 week lead time for new orders.\n\n\nA one-piece headphone design\nThe goal was straightforward: create a headphone with no resonance and a sound as dynamic and clean as possible. That pursuit pushed SJY toward a simple yet radical solution: remove all non-essentials. The Zeph’s driver, chassis, and ear cup form a single precision-machined structure, reducing variables and minimizing vibration. This approach enabled the thinnest chassis SJY could physically build—just 7mm—resulting in a fast, low-resonance open-back headphone with nothing standing between you and the music.\nLow distortion & minimal energy loss\nThe Zeph’s goal is Immediate response, low distortion, and minimal energy loss. Traditional headphones place a driver inside a cup, leaving multiple surfaces and interfaces that can vibrate. The Zeph eliminates those surfaces entirely. With the driver itself being a single machined aluminum body, the entire assembly behaves as one piece: stable, rigid, and sonically quiet. This tighter control over motion enhances magnetic force efficiency, lowers distortion, and gives the Zeph its energetic, highly detailed character.\nThe thinnest chassis possible\nSJY made the chassis as thin as physics allowed, stopping only when they reached the minimum depth required for a 3.5mm connector. The internal driver assembly totals just 4mm in thickness—2mm magnet, 1.5mm diaphragm structure, and a 0.5mm grille—stacked inside a CNC aluminum frame that keeps the driver perfectly rigid and stable. \nMagnetic ear pads with dual tuning modes\nThe Zeph’s ear pads attach magnetically, making them simple to remove and fast to swap. Each pad uses velour on the exterior and suede on the inner surfaces for a gentle seal and controlled treble response. Flip the pads to switch between two voicings:\n\n\nPerforated side forward — more open, more spacious, laid-back vocals, enhanced instrument presence.\n\n\nNon-perforated side forward — warmer, more focused mids with forwa","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323613.png?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323623.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323621.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323619.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323627.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323626.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323612.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210615942.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210615941.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323624.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323622.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323616.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323617.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323614.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323618.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210323620.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210914789.jpg?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210615944.png?v=1776677493","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sjy-headphone-sjy-zeph-open-back-planar-magnetic-headphones-1210615943.png?v=1776677493"],"price":999,"currency":"USD","in_stock":true,"inventory_qty":59994,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:57.308Z"},"share_url":"https://firestarter.network/l/lst_p0CsvOGy","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer ","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_p0CsvOGy' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy SJY Zeph Open-Back Planar Magnetic Headphones' and a budget_max comfortably above $999.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}