{"type":"firestarter.listing","listing":{"id":"lst_cZaLRu5N","product_name":"GUSTARD C18 High Precision Low Phase Noise Clock Generator","category":"Audio Clock","description":"External Clock for Digital Audio\nThe Gustard C18 is a high-precision 10MHz master clock designed for digital audio systems that can accept an external clock reference. Built around an ultra-low-noise SC-cut OCXO, it delivers low phase noise, strong frequency stability, and both sine wave and square wave outputs for connecting compatible DACs, streamers, interfaces, and other clock-ready components.\nLow-noise clocking for digital audio\nDigital audio components rely on clock timing to organize the flow of data. The C18 gives compatible gear a dedicated 10MHz reference clock, helping reduce timing instability in systems built around external clock input. Its phase noise is rated at -110dBc at 1Hz typical, giving connected equipment a cleaner timing reference to work from.\nSC-cut OCXO core\nAt the center of the C18 is an ultra-low-noise oven-controlled crystal oscillator, or OCXO. An OCXO keeps the quartz crystal at a constant temperature, which helps reduce frequency shifts caused by changes in the room around it. The SC-cut crystal is customized for this model and designed for low jitter, low noise, and stable 10MHz output.\nIndependent output drive module\nThe C18 uses Gustard’s GDRV-P1 independent drive output module to preserve clock performance as the signal leaves the oscillator. The OCXO alone is not intended to drive multiple downstream devices directly, so the dedicated driver helps maintain low phase noise while distributing the signal. It provides both sine wave and square wave outputs, making it easier to connect different types of compatible equipment.\nFour clock outputs\nThe rear panel includes two sine wave outputs and two square wave outputs. This gives you a practical way to clock multiple compatible devices from one master clock, instead of relying on a single direct connection that may strain the oscillator or limit how your system is arranged.\nLinear power supply\nThe C18 uses a built-in linear power supply with an audio-dedicated toroidal transformer. C","images":["https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081292.jpg?v=1778185389","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081291.jpg?v=1778185328","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081290.jpg?v=1778185270","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081289.jpg?v=1778185211","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081288.jpg?v=1778185150","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237081287.jpg?v=1778185090","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237136975.jpg?v=1778213948","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1237136974.jpg?v=1778213889","https://cdn.shopify.com/s/files/1/0225/2721/3642/files/apos-audio-gustard-audio-clock-gustard-c18-high-precision-low-phase-noise-clock-generator-1239994857.jpg?v=1779409092"],"price":1599.99,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:25:55.809Z"},"share_url":"https://firestarter.network/l/lst_cZaLRu5N","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_cZaLRu5N' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy GUSTARD C18 High Precision Low Phase Noise Clock Generator' and a budget_max comfortably above $1599.99 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."]}}