{"type":"firestarter.listing","listing":{"id":"lst_KH9L5eXO","product_name":"Moondrop Quarks","category":"Earphones/IEMs","description":"\n\n\nPowerful Composite Magnetic Micro Diaphragm Dynamic Driver\nQuarks adopts a 6mm diameter miniature external magnetic circuit architecture diaphragm dynamic driver, and an external magnetic circuit composed of high-performance neodymium magnets and magnetic conductive parts, which can provide excellent dynamics, lower nonlinear distortion and boosted bass. The diaphragm is made of high-performance polymer materials with both toughness and compliance, and is repeatedly adjusted for the special cavity structure, so as to obtain such excellent linear distortion performance.\n\n\n\n\n\nClosed Anterior Cavity Micro Dynamic Driver IEM\nAs entry-level in-ear earphones, Moondrop Quarks earphone is built into an unparalleled boutique in this tier. We achieved powerful sound quality at this price range after two years repeated adjustment. Quarks has very good frequency response characteristics, neutral tone, well done resolution, and easy to drive. Besides that, Quarks has far superior sound insulation capabilities than ordinary in-ear dynamic earphones because of the unique fully enclosed front cavity design, which allows you to enjoy music quietly in a noisy environment.\n\n\n\n\n\nPatented Anti-Blocking Sound damping &amp; Double Damping Structure\nFront cavity of Quarks is equipped with a second generation patented anti-blocking sound damping, which improves durability and greatly reduces the possibility of blockage due to earwax.For the first time, we adopted a double damping structure, using two materials with completely different acoustic resistance characteristics to filter the mid and high frequencies, bringing a very smooth mid and high frequency response characteristics, greatly eliminating treble ringing. Making the earphone sound more natural and enjoyable.\n\n\n\n\n\nSimple And Unique Appearance\nThe appearance and structural design are just like its name, revealing its meticulousness, compact size and can be worn in various ways.The fully transparent cavity allows a clear view of ","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_2_4216f72f-c1fa-42d7-95f1-f42959c01cef.jpg?v=1660296296","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_4_909b1d18-29ed-40df-9d55-b460882b2ef3.jpg?v=1660296312","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_5_2346c19d-e5a1-49df-a688-a758c8dd9c2d.jpg?v=1660296351","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_8_1f7a789a-60b1-4834-bae1-2261106f0b5d.jpg?v=1660296357","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_1_df182cca-2080-4e87-bf05-a9a8fb3cff7f.jpg?v=1660296377","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_6_4c07c9f6-7162-4d59-8af9-74fdfb110fe8.jpg?v=1660296745","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/1_7_b0f59365-5915-46e0-a1bc-b27cb8395160.jpg?v=1660296758","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/dsp-_6.jpg?v=1668074531","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/dsp-_7.jpg?v=1668074540","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/dsp-_3.jpg?v=1668074571","https://cdn.shopify.com/s/files/1/0040/7201/3924/products/dsp-_5..jpg?v=1668074616"],"price":17.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:47.472Z"},"share_url":"https://firestarter.network/l/lst_KH9L5eXO","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_KH9L5eXO' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Moondrop Quarks' and a budget_max comfortably above $17.99 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."]}}