{"type":"firestarter.listing","listing":{"id":"lst_2UM9KNJC","product_name":"Apos TOPPING-DX3 Pro+ Ensemble","category":"Apos Ensemble","description":"Ensemble, assemble!\nApos Ensembles are the Avengers of audio gear—bundles assembled by our team of audio dorks to save your ears from the forces of mediocre sound. Each bundle is like a squad of supers, with every piece of equipment playing its part to deliver an unbeatable listening experience: a DAC to decode the 1s and 0s, an amp to power up the audio, and all the interconnections necessary to bring the team together.\nMeet the TOPPING-DX3 Pro+ Ensemble\n\nThe Apos TOPPING-DX3 Pro+ Ensemble is a bundle designed to provide you with a premium audio setup straight out of the box. At the heart of this ensemble is the TOPPING DX3 Pro+. Choose to pair it with one of the following headphones: \nThe Apos Caspian Open-Back Headphone features 50mm Kennerton dynamic drivers for a vibrant, immersive sound with deep, controlled bass and clear midrange. It includes hand-stitched sheepskin ear pads, handmade oak ear cups, and a lightweight yet durable headband for comfortable, extended listening. The Caspian is designed to be driven without an amplifier and uses secure 4-pin mini-XLR connectors.\nThe HIFIMAN Sundara Planar Magnetic Headphones feature an ultra-thin diaphragm for detailed and lifelike audio reproduction, with a frequency response of 6Hz-75kHz. Constructed from lightweight aluminum, they offer durability and comfort for extended wear, weighing just 13.1 ounces. The headphones also include a hybrid headband design to prevent pressure points, making them ideal for long listening sessions.\nProducts in this bundle\nTOPPING DX3 Pro+\n\nESS ES9038Q2M DAC chip\nLDAC audio\nTHD+N: 0.00015%\nDSD512\nPCM768kHz\nXMOS XU208\nBuilt-in NFC headphone amp\nRemote control\n\nHIFIMAN Sundara\n\nFrequency Response: 6Hz - 75kHz \nImpedance: 37 ohms \nSensitivity: 94db \nWeight: 13.1oz (372g)\nCable Length: 1.5m\n\nHeadphone Connectors: 3.5mm \n\n\nApos Caspian\n\nFun-sounding, non-fatiguing for marathon sessions\n50mm dynamic driver\nOpen-back\nAll-natural oak earcups sourced from the North Caucasus mountains\nInch-d","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-apos-apos-ensemble-apos-topping-dx3-pro-ensemble-1150740642.jpg?v=1742646767","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-apos-apos-ensemble-apos-topping-dx3-pro-ensemble-1183517858.png?v=1754568278"],"price":617.49,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:00.575Z"},"share_url":"https://firestarter.network/l/lst_2UM9KNJC","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_2UM9KNJC' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Apos TOPPING-DX3 Pro+ Ensemble' and a budget_max comfortably above $617.49 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."]}}