{"type":"firestarter.listing","listing":{"id":"lst_RnA9oM7U","product_name":"Sennheiser HD 800S Dynamic Open-back Headphones","category":"Headphone","description":"Smashes the ceiling for critical listening\nCombining the care devoted to a handcrafted instrument and the precision of modern manufacturing, the HD 800 S lets you explore your entire music collection from the inside out.\nThe Exploration of Sound\nThe HD 800 S demonstrates over 75 years of audio expertise, redefining the critical listening experience. After launching its predecessor—the HD 800—Sennheiser accepted a self-imposed challenge to completely disappear from the last link in the audio chain. Their goal was to provide acoustics so immersive that your awareness dissolves into the creator’s perspective. On their own, each component of the HD 800 S is world-class. The signature sound of the HD 800 S is possible not because of any one of them, but through the synergy of all of them. \n\nIt Has a Ring to It\nThe heart of the HD 800 S and its striking sound is the 56mm Ring Radiator transducer. It leverages the key benefit of a large diaphragm transducer—air displacement—without losing the rigidity that favorably impacts rest and response times. Instead of a single attachment on the outer circumference of the transducer, both outer and inner edges of the “ring” are secured to the drive unit. The voice coil excites the diaphragm, connected to the v-shaped groove found near the center of the ring. A feat in itself, the voice coil is 40mm and wound in-house to ensure the shape and consistency is held to the highest standard.\n\nSolid as a Rock\nThe headphones’ vibration damping chassis and inert headband insert provide complete stability—what you put into the HD 800 S is precisely what you will get out of it. Each transducer is manufactured, tested, and measured to the tightest tolerance to ensure the most dependable performance out of the box. Even the steel mesh found in the baffle is matched and integrated with consistency in mind, as it contributes to ultra-low variance in the management of travelling sound waves. Each HD 800 S includes the frequency response plot unique ","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058965.jpg?v=1773348548","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058964.jpg?v=1773348488","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058966.jpg?v=1773348429","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058968.jpg?v=1773348368","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058967.jpg?v=1773348310","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-sennheiser-headphone-sennheiser-hd-800s-1227058969.jpg?v=1773348248"],"price":1999.95,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:55.941Z"},"share_url":"https://firestarter.network/l/lst_RnA9oM7U","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_RnA9oM7U' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Sennheiser HD 800S Dynamic Open-back Headphones' and a budget_max comfortably above $1999.95 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."]}}