{"type":"firestarter.listing","listing":{"id":"lst_1rrRfouz","product_name":"TRN TA4","category":"Earphones/IEMs","description":"\n\n\n\nRobust Level of TRN\nTA4 inherits many points of TA3 and also has some innovations. TRN's products do a good job of balancing price and quality. TRN TA4 adopts conventional electronic crossover to accurately and evenly distribute the bass, midrange, and treble regions. The implementation of both dual dynamic drivers and balanced armature helps achieve coherency throughout the entire frequency spectrum.\n\n\n\n\n\n\nThe Combination of Rigidity and Flexibility\nTA4's dual dynamic drive is equipped with Knowles balanced armature. TRN's acoustics engineers took the TA4 to the next level with their experience on the TA3. The ultra-wide frequency response of the two dynamic drivers and the excellent resolution of the balanced armature are brought together to create exhilarating music experiences.\n\n\n\n\n\n\nCrystal-clear Treble and Beautiful Vocals\nTRN TA4 comes equipped with a 10mm beryllium-coated dual-magnetic dynamic driver responsible for low frequency. A 6mm titanium-coated dynamic driver for mid-range and upper-mid-range frequency. Two Knowles 33518 balanced armature for treble. TRN TA4 provides exquisite treble and upper frequencies. Allow you to truly dive into a musical, yet highly detailed experience with an open and wide soundstage.\n\n\n\n\n\n\nCombination of Alloys and Resins\nThe combination of aluminum alloy faceplate, midframe, and imported semi-transparent resin, together they gives an exquisite and luxurious sonic presentation with an elegant aesthetic appearance. TA4 adopts a semi-open back design, which helps to achieve air pressure balance within the inner acoustics chamber, effectively relieving pressure on the eardrum. This allows full music enjoyment without discomfort.\n\n\n\n\n\n\nPractical Accessories\nStandard audiophile-grade cable Swappable connectors 4 core silver-plated copper wounded and an oxygen-free copper braided cable. TA4 adopts 4 core silver-plated copper wounded and an oxygen-free copper braided cable. with silver-plated OFC copper gives the TA4 an excepti","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/TRNTA4_2b3d98b2-20ed-4ded-a9ff-4e6d0455875e.png?v=1686794176","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/TRNTA42.png?v=1686794176","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/TRNTA41-3.png?v=1686794176","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/TRNTA43.png?v=1686794176","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/TRNTA4.png?v=1686794168"],"price":86.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:46.929Z"},"share_url":"https://firestarter.network/l/lst_1rrRfouz","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_1rrRfouz' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy TRN TA4' and a budget_max comfortably above $86.99 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."]}}