{"type":"firestarter.listing","listing":{"id":"lst_0VlsSXUD","product_name":"xDuoo A35 Integrated Vacuum Tube Amplifier","category":"Speaker Amp","description":"Hand-wired ESS DAC Tube Power Amp\nThe xDuoo A35 is a fully integrated vacuum tube amplifier built for two-channel listening systems. Its hand-wired analog circuit combines a 12AX7 voltage stage, dual 12AU7 driver tubes, and four matched EL34 output tubes in a traditional push-pull configuration capable of delivering 45 watts per channel. Integrated Bluetooth 5.1 connectivity, ESS DAC decoding, and infrared remote control support allow the A35 to function as both a classic stereo amplifier and a modern desktop audio centerpiece.\nClassic EL34 tube amplification\nThe A35 uses a fully tube-based amplification design with one 12AX7 tube handling voltage amplification, two 12AU7 tubes driving the signal stage, and four EL34 tubes powering the output section. The push-pull EL34 topology delivers strong dynamics, natural vocal presentation, and controlled bass response while preserving the warmth and harmonic richness associated with traditional tube amplifiers.\nHand-wired point-to-point construction\nCore signal paths inside the A35 use traditional point-to-point hand wiring to reduce unnecessary lead interference and maintain short copper signal routing. The carefully organized internal layout helps lower crosstalk and preserve stable channel separation while supporting a smooth and spacious stereo presentation.\nUltra-linear operation mode\nThe amplifier operates in ultra-linear mode for improved tonal balance, frequency extension, and output control. This configuration allows the A35 to maintain layered imaging and pinpoint detail retrieval while preserving the smooth tonal character expected from an EL34 tube amplifier.\nIntegrated ESS DAC decoding\nAn ESS ES9018K2M DAC provides onboard digital decoding with low distortion and high signal-to-noise performance. The integrated DAC section allows convenient connection to modern digital music sources while maintaining the amplifier’s analog tube-driven presentation.\nBluetooth 5.1 wireless playback\nThe A35 includes Qualcomm Bluet","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775391.jpg?v=1779993550","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775393.jpg?v=1779993490","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775411.jpg?v=1779993431","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775410.jpg?v=1779993369","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775409.jpg?v=1779993310","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775408.jpg?v=1779993249","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775407.jpg?v=1779993189","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775406.jpg?v=1779993129","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775405.jpg?v=1779993069","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775404.jpg?v=1779993008","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775403.jpg?v=1779992951","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775402.jpg?v=1779992889","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775401.jpg?v=1779992830","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775400.jpg?v=1779992770","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775399.jpg?v=1779992710","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775398.jpg?v=1779992649","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775397.jpg?v=1779992589","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775396.jpg?v=1779992528","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775395.jpg?v=1779992473","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775394.jpg?v=1779992410","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775392.jpg?v=1779992350","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-xduoo-speaker-amp-xduoo-a35-integrated-vacuum-tube-amplifier-1240775412.jpg?v=1779992289"],"price":1299,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:55.768Z"},"share_url":"https://firestarter.network/l/lst_0VlsSXUD","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_0VlsSXUD' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo A35 Integrated Vacuum Tube Amplifier' 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."]}}