{"type":"firestarter.listing","listing":{"id":"lst_5id7ch1u","product_name":"LETSHUOER Cadenza 12","category":null,"description":"\n\n\n\nThe Halo Product Collection that are True Virtuoso\nLETSHUOER officially unveiled the Cadenza series on March 1st , 2023. This series is the company’s top of the line product line. Each one of them are the results of the engineering team’s know-how that was gained over the years. The main design goal of these high-end earphones is to reach the apex of what’s possible and beyond.\n\n\n\n\n\n\nFive Axis Machining Process\nAs the debut entry to this series, Cadenza 12 utilizes a high purity titanium alloy as the chassis material. The pros for titanium alloy include high structural strength while remaining relatively lightweight, magnificent acoustic properties and is less likely to cause irritation on direct skin contact. To achieve the balance between aesthetics and ergonomics, each Cadenza 12 goes through multiple milling, polishing, buffing, electroplating and anti-fingerprint finish processes. The final surface is smooth texture that elevates the aesthetics of the chassis.\n\n\n\n\n\n\nAll-star Driver Selection\nFor driver selection, Cadenza 12 utilize a 10mm DD along with 11 BA to form a flagship ensemble of drivers. The custom DD has a liquid silicone surround and Kevlar dome. This unit is chosen for the high fidelity replay of various instruments and micro details. 11 BA from Sonion and Knowles were put together to play the full spectrum, which is the bedrock of Cadenza 12’s excellent sound performance.\n\n\n\n\n\n\n\nSix-way Crossover\nEngineers implemented a six-way crossover within the acoustic chamber of Cadenza 12. This includes a crossover network and five acoustic tubes from drivers to the nozzle. Placement of drivers, length of tubes, filter position and crossover points went through multiple revision and simulations to ensure the frequency response is smooth, precise, and in-phase.\n\n\n\n\n\n\nModular Cable System\nCadenza 12, being the halo product of the company, comes with a top shelf stock cable. It is made of quality monocrystalline copper and monocrystalline silver in a hybri","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/1_84d2eb25-cf74-4e6b-bccf-e88c7859c244.jpg?v=1685600863","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/1_35df2e2a-127d-4edf-95c7-0ecd25937cc9.jpg?v=1685600975","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/5_fb8635c7-177c-425f-a398-f64cd94aa688.jpg?v=1685600975","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/2_1e32d96e-758b-4853-93be-6d01d5302d4c.jpg?v=1685600975","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/3_ee11598e-d421-427a-b41f-09c5cd720e9a.jpg?v=1685600975","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/4_76e9897f-17f0-4731-857e-cab595428619.jpg?v=1685600975","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/6_21f9e78c-3a78-4c3c-8098-773b498e7a9b.jpg?v=1685600963"],"price":2299,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:46.975Z"},"share_url":"https://firestarter.network/l/lst_5id7ch1u","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 <your Firestarter API key>","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_5id7ch1u' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy LETSHUOER Cadenza 12' and a budget_max comfortably above $2299.00 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."]}}