{"type":"firestarter.listing","listing":{"id":"lst_Rw2Fh2zv","product_name":"Burson Timekeeper GT4 200W Class-AB Mono Block Power Amp","category":"Headphone DAC/Amp","description":"Note: There is a 2-3 week lead time between ordering and fulfillment for this model.\n\n200W Class-AB Mono block power amplifier\nThe Burson Timekeeper GT4 is a 200W Class-AB, high-current monoblock that brings serious drive and composure to demanding speakers. Its Fusion Core gallium nitride power supply, Silent Power regulator modules, and V7 Vivid Pro opamps work together to deliver clean headroom, low noise, and stable control from the first watt to full output. On your rack or desk, it functions as the focused power engine for a modern two-channel system built around a dedicated DAC or preamp.\nHigh-current power that keeps control\nThe Timekeeper GT4 runs a deliberately high idling current, drawing about 100 W at rest so its EXICON MOSFET output stage stays in the most linear part of its operating range. Within the first 30 W or so it behaves like a pure Class-A amplifier, then transitions into Class-AB as demand rises. At the speaker terminals you get 100 W into 8 Ω and 200 W into 4 Ω—enough current delivery for real-world speakers that dip in impedance and like to be driven. The result is firm bass, stable imaging, and headroom that makes loud passages feel relaxed instead of strained.\nFusion Core GaN supply for ultra-clean power\nBurson’s Fusion Core supply replaces a traditional transformer with a compact switch-mode design built around gallium nitride (GaN) transistors. These devices switch at far higher frequencies than standard silicon MOSFETs, which allows more effective filtering of switching noise and a smoother DC rail. The Fusion Core can deliver up to 480 W of low-noise power with a robust current pump circuit, feeding the amplifier with the kind of stability that translates into tighter bass lines and cleaner transients at your listening position.\nSilent Power regulation and black backgrounds\nGood power starts at the wall, but it is the regulation that determines how quiet an amplifier feels in use. The Timekeeper GT4 uses Burson Silent Power regulator","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080178.jpg?v=1765628688","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080175.jpg?v=1765628680","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080180.jpg?v=1765628815","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080179.jpg?v=1765628677","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080177.jpg?v=1765628682","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080176.jpg?v=1765628685","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080186.jpg?v=1765628800","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080185.jpg?v=1765628808","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080184.jpg?v=1765628803","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080183.jpg?v=1765628796","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080182.jpg?v=1765628806","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-burson-headphone-dac-amp-burson-timekeeper-gt4-200w-class-ab-mono-block-power-amp-1211080181.jpg?v=1765628811"],"price":3999,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:56.739Z"},"share_url":"https://firestarter.network/l/lst_Rw2Fh2zv","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_Rw2Fh2zv' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Burson Timekeeper GT4 200W Class-AB Mono Block Power Amp' and a budget_max comfortably above $3999.00 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."]}}