{"product_id":"the-signal-refiner-fosi-zd3-desktop-dac","title":"The Signal Refiner | Fosi Audio ZD3 Balanced Desktop DAC with HDMI ARC","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp style=\"font-size:18px;font-weight:600;line-height:1.6;\"\u003eA digital signal is only as good as the last chip that touched it, and most desktop systems quietly let the worst one win.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003ePut a desktop amplifier next to a television and a laptop and the chain becomes a mess of formats. The television sends audio over HDMI, the laptop sends it over USB, the phone sends it over Bluetooth, and each source carries its own converter and its own idea of what a clean signal looks like. The result is a system where the same recording sounds different depending on which cable is plugged in. The ZD3 replaces that chain with one conversion stage: everything arrives at the same chassis, and every input leaves through the same balanced output.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003eThe conversion is handled by an ES9039Q2M, the flagship ESS converter in this price class, paired with an XMOS XU316 USB interface, a QCC3031 Bluetooth receiver and an LME49720 operational amplifier. In practice that combination delivers PCM at up to 32 bit 768 kHz and DSD512 over USB, a signal to noise ratio of 126 dB, and total harmonic distortion plus noise below 0.00008 percent, which are numbers that describe a floor rather than a flavour. Inputs cover Bluetooth, USB, optical, coaxial and HDMI ARC, and the outputs are both balanced XLR and single ended RCA, so the DAC can drive a power amplifier properly rather than merely adequately. A 1.5 inch OLED display, an infrared remote, a preamp bypass switch and 12 volt trigger inputs complete the picture.\u003c\/p\u003e\n\u003cp style=\"line-height:1.85;\"\u003eBuy the ZD3 if you are building a desk system around powered speakers or a compact amplifier and want one conversion point for television, computer, disc transport and phone. The HDMI ARC input is the feature that separates it from nearly every other desktop DAC, because it lets the television hand off audio without a separate extractor box and a second remote. The preamp bypass switch keeps the signal path short when you are feeding an integrated amplifier, and the 12 volt trigger brings the whole rack up together. It pairs directly with the same family of amplifiers, and the bundle options let you add the amplifier or a dedicated 12 volt supply in one order.\u003c\/p\u003e\n\u003cp style=\"font-style:italic;color:#444;line-height:1.8;\"\u003eOne chassis, one conversion, one honest signal path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ ES9039Q2M digital to analogue converter with XMOS XU316 USB interface\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ HDMI ARC input, so a television connects without an audio extractor\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Bluetooth 5.0 with SBC, AAC, aptX and aptX HD support\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ Fully balanced XLR and single ended RCA outputs\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ PCM up to 32 bit 768 kHz and DSD512 over USB\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ 126 dB signal to noise ratio and THD+N below 0.00008 percent\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e✦ 1.5 inch OLED display, infrared remote, preamp bypass switch and 12 V trigger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eConverter:\u003c\/strong\u003e ESS ES9039Q2M\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eUSB interface:\u003c\/strong\u003e XMOS XU316\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eBluetooth:\u003c\/strong\u003e QCC3031, Bluetooth 5.0, SBC, AAC, aptX, aptX HD\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eOperational amplifier:\u003c\/strong\u003e LME49720\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e Bluetooth, USB, optical, coaxial, HDMI ARC\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e Balanced XLR and single ended RCA\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMaximum sampling rate:\u003c\/strong\u003e PCM 32 bit \/ 768 kHz over USB, DSD512\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSignal to noise ratio:\u003c\/strong\u003e 126 dB\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eTotal harmonic distortion plus noise:\u003c\/strong\u003e Below 0.00008 percent\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 1.5 inch OLED\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eControl:\u003c\/strong\u003e Infrared remote, push button front panel, preamp bypass switch\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eIntegration:\u003c\/strong\u003e 12 V trigger in and out, synchronised power on and off\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eChassis:\u003c\/strong\u003e Metal enclosure\u003c\/li\u003e\n\u003cli style=\"padding:9px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eApplication Scenarios\u003c\/h3\u003e\n\u003cp style=\"line-height:1.85;\"\u003eThe ZD3 earns its place wherever several digital sources share one pair of speakers. A desk system with powered monitors uses USB from the computer for work and Bluetooth from a phone for everything else, with the television arriving over ARC when the evening starts. A compact hi-fi uses the coaxial or optical input from a disc transport and the balanced output into a power amplifier, with the preamp bypass keeping the signal path short. Because the chassis matches the same family of desktop amplifiers, it also works as the front end of a stack built one component at a time, which is how most people actually upgrade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: What does the HDMI ARC input actually do?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eIt accepts audio from a television over the HDMI connection the television already uses for video, so you do not need a separate audio extractor or a second remote to switch sources.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Can it drive headphones?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eThe ZD3 is a DAC and preamp with line and balanced outputs. It feeds an amplifier or powered speakers rather than driving headphones directly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Does Bluetooth lose quality compared with USB?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eBluetooth 5.0 with aptX HD is very good for casual listening, but USB carries the full 32 bit 768 kHz and DSD512 capability. Use USB for critical listening and Bluetooth for convenience.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Will it work with my existing amplifier?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eYes. The RCA outputs suit integrated amplifiers and the balanced XLR outputs suit amplifiers with balanced inputs. The preamp bypass switch keeps the path direct when the amplifier handles volume.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Is a power supply included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eThe 12 volt power supply option is available in the bundle selection. Choose the variant that matches the equipment you already have.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:16px;\"\u003e\n\u003cp style=\"margin:0 0 6px 0;\"\u003e\u003cstrong\u003eQ: Does it support DSD?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin:0;color:#555;line-height:1.75;\"\u003eYes, up to DSD512 over USB, alongside PCM up to 32 bit 768 kHz.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin:26px 0;border:0;border-top:1px solid #eee;\"\u003e\n\u003cdiv class=\"eastsupplier-promise\"\u003e\n\u003ch3\u003eThe EastSupplier Promise\u003c\/h3\u003e\n\u003cp style=\"line-height:1.85;\"\u003eEvery EastSupplier order is inspected before dispatch, tracked end to end, and backed by a support team that answers. If a unit arrives damaged, or the item you receive does not match the specification printed here, we replace it or refund it. You are buying a product, not a promise you have to chase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S678a671729544fafb603dd50291728cfk_23189813-ef50-44c7-8e4c-e1299aaa2154.webp?v=1791342823\" alt=\"The Signal Refiner | Fosi Audio ZD3 Balanced Desktop DAC with HDMI ARC\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/A79bf702afc984ba3b3e238a222e80bfcX_1f0ab2d1-e888-4428-9dc6-fafafb350c81.webp?v=1791342823\" alt=\"The Signal Refiner | Fosi Audio ZD3 Balanced Desktop DAC with HDMI ARC\" loading=\"lazy\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg 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