{"type":"firestarter.listing","listing":{"id":"lst_rQqqj5s8","product_name":"GUSTARD X30 4xES9039SPRO Streamer Digital to Analog Convertor (DAC)","category":"DAC (Digital-to-Analog Converter)","description":"\nQuad-DAC desktop streamer, DAC, and preamp\n\nThe Gustard X30 is a flagship DAC and network streamer built for uncompromising sound quality and modern flexibility. Featuring four ES9039S Pro DAC chips, a discrete Class‑A analog stage, FPGA-based control, and an integrated preamp with relay R2R volume, it delivers precise, natural, and spacious audio. With Roon, AirPlay, UPnP, and Spotify streaming over Ethernet, plus fixed balanced and single‑ended outputs, the X30 serves as a refined centerpiece for high-end digital and analog systems alike.\n\nQuad ES9039S Pro DAC Chips\n\nEach stereo channel is driven by two ES9039S Pro chips with independent power and grounding, maintaining strict channel separation. This reduces interference and enriches spatial imaging, delivering nuanced stereo definition.\n\nAnalog Low‑Pass Filter in Discrete Class A\n\nThe X30’s analog low-pass filter uses discrete Class‑A circuitry tailored to ES9039S Pro’s behavior. Every component operates at its optimal point for fidelity, crafting a detailed yet natural tonal response.\n\nFPGA-driven Streamer with Preamp Relay\n\nA programmable FPGA controller manages clocking, PLL shaping, DEP op filtering, and i2s/PCM/DSD decoding. It also enables relay-based R2R volume control within the analog domain—controled via remote—with no signal degradation whether used with an amp or active speakers.\nK2 OCXO Clock & External Sync via BNC.\nThe X30 integrates a K2 oven-controlled crystal oscillator (OCXO) for stable timing and allows a 10 MHz external clock input via BNC (square/sine wave, 0.2–3.3 V). \nNetwork Streamer with Broad Format Support\nBuilt-in Gigabit Ethernet enables streaming protocols including Roon, AirPlay, UPnP, NAA, and Spotify, with web-based config and online firmware updates.\n\nFixed-Level Balanced & Single‑Ended Outputs\n\nThe X30 provides fixed-level outputs: RCA (2.5 Vrms, 100 Ω) and XLR (5.1 Vrms, 100 Ω), ideal for downstream preamps or direct amplifier connection.\nProduct Highlights\n\n\nFour ES","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-gustard-x30-4xes9039spro-streamer-digital-to-analog-convertor-dac-1177017297.webp?v=1774318066","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-gustard-x30-4xes9039spro-streamer-digital-to-analog-convertor-dac-1177017296.webp?v=1774318066","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-gustard-x30-4xes9039spro-streamer-digital-to-analog-convertor-dac-1177017295.webp?v=1774318066"],"price":2999.99,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:57.455Z"},"share_url":"https://firestarter.network/l/lst_rQqqj5s8","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 ","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_rQqqj5s8' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy GUSTARD X30 4xES9039SPRO Streamer Digital to Analog Convertor (DAC)' and a budget_max comfortably above $2999.99 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."]}}