{"type":"firestarter.listing","listing":{"id":"lst_ib4fU6IA","product_name":"TOPPING Pre900","category":"AMP & DAC","description":"                                          Full-Path Balanced Architecture                The Pre900 features a four-channel reference-grade amplification circuit. It is not only fully balanced, but also implements a true end-to-end differential design from input to output. Left and right channels are physically isolated to the highest degree, effectively suppressing noise and electromagnetic interference, delivering exceptionally pure, pristine sound.                                                                                Independent Power Supplies                Digital and analog circuits are powered completely independently, minimizing crosstalk at the source. Even at high dynamic output, the noise floor remains imperceptible, the background pitch-black, and every musical detail vividly alive.                                                                                0.1 dB Precision Relay Volume Control                The Pre900 uses a relay array combined with a high-precision resistor network to achieve 1,000-step volume adjustment, with each step switching smoothly and naturally. Crosstalk is kept below −150 dB, ensuring that the left and right channels remain perfectly synchronized at any volume. Throughout the entire adjustment process, only the volume changes—the tonal quality remains completely consistent.                                                                                Powerful Headroom and Pristine Signal                The Pre900 delivers an impressive output swing of up to 69 Vpp, with gain reaching 19.9 dB. Even during explosive transient peaks, it maintains ample headroom without clipping, bringing a more powerful and dynamic listening experience. With a noise floor of &lt;0.3 μVrms*, the Pre900 can fully amplify even the most delicate signals without adding audible noise, preserving the integrity, stability, and transparency of the sound.*Actual noise level is measured by amplifying the Pre900’s noise signal by 40 dB (100×)","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-04.jpg?v=1778826304","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-08.jpg?v=1778826304","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-03.jpg?v=1778826304","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-07.jpg?v=1778826303","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-02_19777658-835c-4481-82f9-a205ece91c97.jpg?v=1778826480","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/Pre900-01_8fa28d65-46fc-4849-b528-d104ef26414c.jpg?v=1778826566"],"price":1499,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:44.003Z"},"share_url":"https://firestarter.network/l/lst_ib4fU6IA","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_ib4fU6IA' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy TOPPING Pre900' and a budget_max comfortably above $1499.00 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."]}}