{"type":"firestarter.listing","listing":{"id":"lst_iO0jLZYX","product_name":"TOPPING A900 Ultra-Flagship Headphone Amplifier","category":"Headphone Amp","description":"\n Ultra-flagship power, precision, and balance\n\nThe TOPPING A900 is an ultra-flagship headphone amplifier designed for listeners who want massive power, sonic precision, and the satisfaction of fully-balanced, reference-level audio. With a six-channel T'ang-ku-la circuit, a true differential architecture, 151dB SNR, and a peak output of 22,000mW x2 @16Ω, the A900 delivers clean, powerful sound and remarkable control over any pair of headphones or monitors. \nMassive 22,000mW x2 output power\nWith up to 22,000mW per channel at 16Ω, the A900 has headroom for even the most demanding headphones. Thanks to the patented T’ang-ku-la architecture, it minimizes distortion, lowers heat, and reduces noise. This is pure power against a black backdrop, with THD below 0.00003% and a 151dB SNR.\nT’ang-ku-la architecture\nAt the heart of the A900 is the patented three-stage feedback T’ang-ku-la circuit. It uses six channels of fully differential amplification to maintain balance all the way from source to output. This design cuts circuit noise and high-frequency distortion while boosting reliability and lowering thermal noise. The result is greater dynamic range, cooler operation, and a sound that stays clean and controlled. \nEvery headphone connection you need\nThe A900 offers six physical headphone outputs, including 6.35mm single-ended, 4.4mm balanced, 4-pin XLR balanced, and dual 3-pin balanced. Premium connectors from Neutrik and Pentaconn ensure tight, reliable contact. You can configure outputs as independent or simultaneous, so you can test or monitor multiple headphones without swapping cables. \nPreamp mode when you want it\nFlip the A900 into dedicated preamp mode and use its balanced XLR outputs to feed a power amp or monitors. You get the same flagship-level performance with THD+N below 0.000055% and up to 60Vpp output. \nSmooth, balanced volume control\nVolume is handled by a fully-balanced relay-based system with 0.5dB steps and channel crosstalk as low as -153dB. That means 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:1199,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:57.277Z"},"share_url":"https://firestarter.network/l/lst_iO0jLZYX","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_iO0jLZYX' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy TOPPING A900 Ultra-Flagship Headphone Amplifier' and a budget_max comfortably above $1199.00 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."]}}