{"product_id":"gustard-x30-quad-es9039spro-dac","title":"GUSTARD X30 Quad ES9039SPRO Network Streaming DAC \u0026 Preamp","description":"\u003cp\u003e\u003cstrong\u003eGUSTARD X30 Network Streaming DAC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe GUSTARD X30 is a flagship DAC and network streamer built for uncompromising sound quality and modern flexibility. Featuring four ES9039SPRO 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuad ES9039SPRO DAC Chips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEach stereo channel is driven by two ES9039SPRO chips with independent power supplies and grounding, maintaining strict channel separation. This fully balanced architecture reduces interference, enriches spatial imaging, and delivers nuanced stereo definition across the entire frequency range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDSP Digital Filter on SHARC Platform\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA newly developed high-performance digital filter runs on the Analog Devices SHARC digital audio DSP platform, using high-precision 64-bit floating-point operations and advanced anti-aliasing noise algorithms to significantly reduce in-band aliasing noise for superior sound quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFPGA Programmable Logic Control\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA programmable FPGA manages clock functions, 2nd PLL digital shaping, DOP demodulation, and PCM\/DSD depop switching. This provides a robust foundation for clock management and precise signal routing, keeping the digital path clean and stable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eK2 OCXO Clock \u0026amp; 10MHz Sync\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe X30 integrates a K2 oven-controlled crystal oscillator (OCXO) for stable, high-precision clock signals. A dedicated 10MHz BNC input accepts an external master clock (square\/sine wave, 0.2–3.3V), synchronizing decoding with a reference clock for systems where timing control matters most.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNetwork Streaming Bridge\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt-in Gigabit Ethernet supports Roon, AirPlay, UPnP, HQPlayer NAA, and Spotify Connect, with web-based configuration and online firmware updates. The X30 acts as a complete streaming DAC, connecting directly to your network and playback services without additional hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiscrete Class-A Analog Stage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe analog low-pass filter uses discrete Class-A circuitry tailored to the ES9039SPRO’s behavior, with a high-current I\/V converter and parallel connection circuit that fully utilizes the chip’s current capability. Every component operates at its optimal point for a detailed yet natural tonal response.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePassive Relay Preamp with R2R Volume\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA relay-based R2R volume control operates in the analog domain, adjustable via the included remote with no signal degradation. The X30 can drive power amplifiers or active speakers directly, or serve as a high-end fixed-output DAC for an external preamp.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Outputs \u0026amp; Measured Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFixed-level RCA (2.5Vrms, 100Ω) and XLR (5.1Vrms, 100Ω) outputs connect to preamps or amplifiers directly. Measured performance is reference-grade: THD+N ≤0.0001% @ 1kHz, SNR 129dB, dynamic range 130dB, crosstalk −139dB @ 10kHz, and a frequency response of 20Hz–20kHz within ±0.2dB.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Chips:\u003c\/strong\u003e 4 × ESS ES9039SPRO (two per channel, fully balanced, independent power\/grounding)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Inputs:\u003c\/strong\u003e LAN (100\/1000Mbps), USB, Optical, Coaxial, AES\/EBU, I²S, 10MHz BNC clock input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreaming Protocols:\u003c\/strong\u003e Roon, AirPlay, UPnP, HQPlayer NAA, Spotify Connect (web config, online firmware updates)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSampling Rates:\u003c\/strong\u003e PCM up to 768kHz; DSD512 (via USB\/LAN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Outputs:\u003c\/strong\u003e Fixed XLR 5.1Vrms (100Ω) + RCA 2.5Vrms (100Ω)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Filter:\u003c\/strong\u003e SHARC DSP platform, 64-bit floating-point, anti-aliasing noise algorithm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClock System:\u003c\/strong\u003e K2 OCXO oven-controlled crystal oscillator; external 10MHz BNC (square\/sine, 0.2–3.3V)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreamp:\u003c\/strong\u003e Relay-based R2R analog volume control (remote adjustable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Stage:\u003c\/strong\u003e Discrete Class-A low-pass filter; high-current I\/V converter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e ≤0.0001% @ 1kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e 129dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 130dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrosstalk:\u003c\/strong\u003e −139dB @ 10kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz–20kHz (±0.2dB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e AC 115V\/230V, 50\/60Hz; \u0026lt;30W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W×H×D):\u003c\/strong\u003e 430 × 300 × 80 mm (92mm with feet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.0 kg (packaged)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColors:\u003c\/strong\u003e Black, Silver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGUSTARD X30 main unit\u003c\/li\u003e\n\u003cli\u003eRemote control\u003c\/li\u003e\n\u003cli\u003ePower cable\u003c\/li\u003e\n\u003cli\u003eUser manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dac-hero-overview.jpg?v=1787229285\" alt=\"gustard x30 dac hero overview\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dac-introduction.jpg?v=1787229283\" alt=\"gustard x30 dac introduction\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-quad-es9039spro-architecture.jpg?v=1787229284\" alt=\"gustard x30 quad es9039spro architecture\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-four-dac-chips-design.jpg?v=1787229284\" alt=\"gustard x30 four dac chips design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dual-dac-per-channel.jpg?v=1787229282\" alt=\"gustard x30 dual dac per channel\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dsp-digital-filter.jpg?v=1787229284\" alt=\"gustard x30 dsp digital filter\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-sharc-dsp-platform.jpg?v=1787229284\" alt=\"gustard x30 sharc dsp platform\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-fpga-programmable-logic.jpg?v=1787229284\" alt=\"gustard x30 fpga programmable logic\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-k2-ocxo-clock.jpg?v=1787229284\" alt=\"gustard x30 k2 ocxo clock\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-external-10mhz-clock.jpg?v=1787229283\" alt=\"gustard x30 external 10mhz clock\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-clock-synchronization.jpg?v=1787229285\" alt=\"gustard x30 clock synchronization\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-network-streaming-bridge.jpg?v=1787229282\" alt=\"gustard x30 network streaming bridge\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-roon-airplay-upnp.jpg?v=1787229283\" alt=\"gustard x30 roon airplay upnp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-spotify-naa-streaming.jpg?v=1787229284\" alt=\"gustard x30 spotify naa streaming\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-discrete-class-a-analog-stage.jpg?v=1787229285\" alt=\"gustard x30 discrete class a analog stage\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-iv-converter-circuit.jpg?v=1787229283\" alt=\"gustard x30 iv converter circuit\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-analog-lpf-design.jpg?v=1787229280\" alt=\"gustard x30 analog lpf design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-relay-r2r-volume-preamp.jpg?v=1787229283\" alt=\"gustard x30 relay r2r volume preamp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-balanced-xlr-rca-outputs.jpg?v=1787229281\" alt=\"gustard x30 balanced xlr rca outputs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-fixed-output-connectivity.jpg?v=1787229281\" alt=\"gustard x30 fixed output connectivity\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-trigger-and-inputs.jpg?v=1787229281\" alt=\"gustard x30 trigger and inputs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-technical-specifications.jpg?v=1787229284\" alt=\"gustard x30 technical specifications\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-measurements-performance.jpg?v=1787229285\" alt=\"gustard x30 measurements performance\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dimensions-design.jpg?v=1787229284\" alt=\"gustard x30 dimensions design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-in-the-box-package.jpg?v=1787229284\" alt=\"gustard x30 in the box package\"\u003e\u003c\/p\u003e","brand":"GUSTARD","offers":[{"title":"Black","offer_id":48851885326528,"sku":"10011354","price":23992.09,"currency_code":"HKD","in_stock":true},{"title":"Silver","offer_id":48851885424832,"sku":"10016243","price":23992.09,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-x30-dac-front-view.jpg?v=1787229284","url":"https:\/\/hifichic.com\/products\/gustard-x30-quad-es9039spro-dac","provider":"HIFICHIC","version":"1.0","type":"link"}