{"product_id":"gustard-r30-discrete-r2r-dac","title":"GUSTARD R30 Fully Discrete R2R Network Streaming DAC","description":"\u003cp\u003e\u003cstrong\u003eGUSTARD R30 Discrete R2R Network Streaming DAC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe GUSTARD R30 is a flagship fully discrete R2R ladder network streaming DAC for listeners who want digital done differently. Instead of delta-sigma toggling, its resistor ladder converts digital signals directly, producing a natural, detailed sound free of the digital edge. Around this core sits serious engineering – true 1-bit DSD decoding, FPGA-based clock management, a self-developed network bridge, and a discrete Class-A analog output stage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFully Discrete R2R Ladder Architecture\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe R30’s self-designed discrete R2R module converts digital signals directly through a precision-matched resistor ladder network. This demands extreme resistor matching and stability, but it pays off with a more organic, analog-like conversion that avoids the high-frequency switching artifacts of conventional delta-sigma DACs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue 1-Bit DSD Decoding\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNative support for DSD1024 handles data density 1,024 times that of CD audio. In DIRECT DSD mode, the bitstream bypasses PCM conversion entirely and is decoded straight through a 1-bit switching array, preserving micro-details and timing integrity for an extremely detailed, dynamic presentation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFPGA Digital Filtering with Triple Modes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThree filter modes – Linear Sharp, Minimum Slow, and Super Slow – let you shape the sound to your taste. Built on adaptive multi-order algorithms, the filtering reduces in-band aliasing noise while enhancing resolution and dynamics, free from the harshness found in conventional DACs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOCXO \u0026amp; GCLK-02 Precision Clocking\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn SC-cut crystal OCXO clock keeps jitter to imperceptible levels thanks to exceptional thermal stability and stress resistance. The GCLK-02 clock module with proprietary PLL achieves 1Hz sync-lock precision, and a dedicated 10MHz BNC input accepts an external master clock for reference-grade systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNetwork Bridge Built for Music\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe self-developed CelWare-based network bridge strips away non-audio processes to minimize jitter and latency. Protocol support includes Roon Bridge, AirPlay, HQPlayer NAA, UPnP\/DLNA, Spotify Connect, mConnect, BubbleUPnP, and QQMusic, with web-based control via \/\/r30.local.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDiscrete Class-A Analog Stage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInstead of integrated op-amps, the R30’s discrete Class-A low-pass filter stage lets each component be tuned individually, giving better control of frequency response, harmonic character, and transient handling for a rich, natural tonal balance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePassive Relay Preamplifier\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith its R2R relay-based volume control, the R30 doubles as a passive analog preamp. Switch into pure bypass mode to use it strictly as a DAC, or connect it directly to powered monitors or a power amplifier and control volume remotely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComprehensive Connectivity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInputs cover USB (XMOS XU216 with isolation), coaxial, optical, AES\/EBU, dual I²S with adjustable pinout, LAN, and a TF card reader. Outputs include balanced XLR (5.1Vrms) and unbalanced RCA (2.5Vrms), both 100Ω, plus trigger in\/out for system integration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMeasured Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReference-grade measured performance: THD+N ≤0.00145% @ 1kHz, SNR \u0026gt;121dB, dynamic range \u0026gt;123dB, crosstalk −139dB @ 10kHz, and a frequency response of 20Hz–20kHz within ±0.2dB – clean, transparent conversion across the whole band.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC Architecture:\u003c\/strong\u003e Fully discrete R2R ladder network, 27-bit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDSD Support:\u003c\/strong\u003e Native DSD1024 via I²S (true 1-bit); DSD512 via USB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePCM Support:\u003c\/strong\u003e Up to 1536kHz via I²S; 768kHz via USB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Filters:\u003c\/strong\u003e FPGA NOS + triple modes: Linear Sharp, Minimum Slow, Super Slow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClock System:\u003c\/strong\u003e SC-cut OCXO + GCLK-02, PLL 1Hz sync-lock; external 10MHz BNC input (50Ω, 0–20dBm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e \u0026gt;123dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-Noise Ratio:\u003c\/strong\u003e \u0026gt;121dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e ≤0.00145% @ 1kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrosstalk:\u003c\/strong\u003e −139dB @ 10kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIMD:\u003c\/strong\u003e ≈0.002% @ −1dBFS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Outputs:\u003c\/strong\u003e XLR 5.1Vrms + RCA 2.5Vrms (fixed or relay volume controlled, 100Ω)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Inputs:\u003c\/strong\u003e USB (XMOS XU216), Coaxial, Optical, AES\/EBU, Dual I²S, LAN, TF card reader\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStreaming Protocols:\u003c\/strong\u003e Roon Bridge, AirPlay, HQPlayer NAA, UPnP\/DLNA, Spotify Connect, mConnect, BubbleUPnP, QQMusic (CelWare)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreamplifier:\u003c\/strong\u003e R2R relay-based passive volume control with pure bypass mode\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrigger:\u003c\/strong\u003e Trigger in\/out\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e AC 115V\/230V, 50\/60Hz; consumption \u0026lt;35W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W×H×D):\u003c\/strong\u003e 430 × 300 × 80 mm (94mm with feet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10.0 kg\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 R30 discrete R2R DAC\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-r30-dac-hero-overview.jpg?v=1787223513\" alt=\"gustard r30 dac hero overview\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-discrete-r2r-ladder-dac.jpg?v=1787223511\" alt=\"gustard r30 discrete r2r ladder dac\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-r2r-architecture-detail.jpg?v=1787223513\" alt=\"gustard r30 r2r architecture detail\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-natural-analog-sound.jpg?v=1787223512\" alt=\"gustard r30 natural analog sound\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-true-1bit-dsd-decoding.jpg?v=1787223513\" alt=\"gustard r30 true 1bit dsd decoding\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-dsd1024-native-support.jpg?v=1787223513\" alt=\"gustard r30 dsd1024 native support\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-pcm-hi-res-support.jpg?v=1787223510\" alt=\"gustard r30 pcm hi res support\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-fpga-digital-filtering.jpg?v=1787223511\" alt=\"gustard r30 fpga digital filtering\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-triple-digital-filter-modes.jpg?v=1787223510\" alt=\"gustard r30 triple digital filter modes\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-ocxo-clock-module.jpg?v=1787223512\" alt=\"gustard r30 ocxo clock module\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-gclk-02-femto-clock.jpg?v=1787223511\" alt=\"gustard r30 gclk 02 femto clock\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-external-10mhz-clock.jpg?v=1787223513\" alt=\"gustard r30 external 10mhz clock\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-clock-synchronization.jpg?v=1787223513\" alt=\"gustard r30 clock synchronization\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-network-streaming-bridge.jpg?v=1787223513\" alt=\"gustard r30 network streaming bridge\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-celware-streaming-system.jpg?v=1787223514\" alt=\"gustard r30 celware streaming system\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-roon-airplay-upnp.jpg?v=1787223513\" alt=\"gustard r30 roon airplay upnp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-discrete-class-a-analog-stage.jpg?v=1787223513\" alt=\"gustard r30 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-r30-passive-relay-preamp.jpg?v=1787223511\" alt=\"gustard r30 passive relay preamp\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-relay-volume-control.jpg?v=1787223513\" alt=\"gustard r30 relay volume control\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-bypass-preamp-mode.jpg?v=1787223508\" alt=\"gustard r30 bypass preamp mode\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-xmos-xu216-usb-interface.jpg?v=1787223512\" alt=\"gustard r30 xmos xu216 usb interface\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-usb-isolation-design.jpg?v=1787223509\" alt=\"gustard r30 usb isolation design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-digital-inputs-connectivity.jpg?v=1787223512\" alt=\"gustard r30 digital inputs connectivity\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-ios-coaxial-aes-inputs.jpg?v=1787223512\" alt=\"gustard r30 ios coaxial aes inputs\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-balanced-xlr-rca-outputs.jpg?v=1787223512\" alt=\"gustard r30 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-r30-trigger-connectivity.jpg?v=1787223511\" alt=\"gustard r30 trigger connectivity\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-front-panel-display.jpg?v=1787223511\" alt=\"gustard r30 front panel display\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-technical-specifications.jpg?v=1787223513\" alt=\"gustard r30 technical specifications\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-measurements-performance.jpg?v=1787223513\" alt=\"gustard r30 measurements performance\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-dimensions-design.jpg?v=1787223512\" alt=\"gustard r30 dimensions design\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-in-the-box-package.jpg?v=1787223508\" alt=\"gustard r30 in the box package\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-accessories-remote-control.jpg?v=1787223509\" alt=\"gustard r30 accessories remote control\"\u003e\u003c\/p\u003e","brand":"GUSTARD","offers":[{"title":"Black","offer_id":48851385385152,"sku":"10019410","price":28790.53,"currency_code":"HKD","in_stock":true},{"title":"Silver","offer_id":48851387023552,"sku":"10011589","price":28790.53,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7085\/2544\/files\/gustard-r30-dac-front-view.jpg?v=1787223512","url":"https:\/\/hifichic.com\/products\/gustard-r30-discrete-r2r-dac","provider":"HIFICHIC","version":"1.0","type":"link"}