{"type":"firestarter.listing","listing":{"id":"lst_o1jyVXfM","product_name":"TOPPING DX9 Discrete DAC/Amp","category":"Headphone DAC/Amp","description":"The future of discrete 1-bit design\nA fully balanced DAC and headphone amplifier made for those who build their listening chains around precision. The DX9 Discrete is a rethinking of Topping’s flagship architecture from the ground up. Its self-developed 16-element PSRM 1-bit DAC eliminates conventional chip limitations, delivering micro-detail and tonal accuracy that extend deep into the noise floor. The six-channel discrete NFCA headphone amplifier pushes 7,080mW ×2 into 32Ω loads with near-zero distortion, while the ten-band PEQ and fully-balanced hybrid relay volume control let you tailor your playback with surgical control. Use it as a transparent DAC for active monitors, a powerful headphone amplifier for high-impedance cans, or a pristine preamp for your main system.\nDX9 Discrete – What’s New? \n\n\n\nFeature\nDX9 Discrete\nDX9\n\n\n\n\nDAC Architecture\n16-Element PSRM\nAK4499EQ\n\n\nTHD+N @1kHz (A-wt)\n<0.00006%\n<0.00007%\n\n\nChannel Crosstalk\n-136dB @1kHz\n-125dB @1kHz\n\n\nDSP Config\nSupported\nNot Supported\n\n\nPEQ\nTen-Band High-Precision PEQ\nNot Supported\n\n\n\n \n\n1-bit done right\n\nTopping’s proprietary PSRM DAC architecture uses 16 discrete elements per channel to perform 1-bit decoding with nanosecond-level switching. By eliminating off-the-shelf DAC chips, the DX9 Discrete controls every step of the digital-to-analog process. The result is extraordinary linearity and clarity: 131dB SNR, <0.00006% THD+N, and perfectly stable channel balance.\n\nGoodbye to jitter\n\nA CPLD precision clock system and dual-stage jitter suppression circuit keep the digital signal clean. The AK4118 receiver handles coaxial, optical, and AES inputs with less than 50ps RMS jitter, supporting PCM up to 768kHz and DSD512. Music sounds defined and stable, with transients intact and decay left untouched.\n\nBalanced power from end to end\n\nThe DX9 Discrete’s six-channel discrete NFCA amplifier is built for demanding headphones. Each channel operates independently, producing up to 7,080mW ×2 at 32Ω with 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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 ","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_o1jyVXfM' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy TOPPING DX9 Discrete DAC/Amp' and a budget_max comfortably above $1299.00 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."]}}