{"product_id":"smsl-su-3-desktop-dac","title":"SMSL SU-3 Desktop DAC","description":"\u003ch1\u003e\u003cstrong\u003e32-band PEQ DAC\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe SMSL SU-3 is a compact desktop digital-to-analog converter built around an AKM AK4496 DAC and XMOS XU-316 USB interface. It supports PCM up to 32-bit\/768 kHz and DSD512, provides balanced XLR and single-ended RCA outputs, and adds 32-band parametric EQ. Dual femtosecond crystal oscillators and a dedicated USB power filtering stage support clean signal conversion in a chassis measuring just 4.57 x 1.57 x 3.43 in (116 x 40 x 87 mm).\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAKM digital conversion\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SU-3 uses an AKM AK4496 DAC for digital-to-analog conversion. SMSL pairs the converter with a carefully designed signal path intended to reduce noise and harmonic interference, with specified THD+N of 0.00012% (-118 dB). Independent APx555B measurements shown by SMSL recorded XLR THD+N of 0.000114% on channel 1 and 0.000125% on channel 2 at approximately 4.1 Vrms.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eHigh-resolution USB audio\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAn XMOS XU-316 USB controller handles high-resolution digital audio and supports PCM from 44.1 kHz through 768 kHz at up to 32-bit resolution. Native DSD support extends from 2.8224 MHz through 22.5792 MHz, corresponding to DSD64 through DSD512. Optical and coaxial inputs support PCM up to 24-bit\/192 kHz.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003ePrecision clocking\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eTwo low-phase-noise femtosecond crystal oscillators provide clock references for the digital audio circuitry. Their role is to reduce timing error and phase noise during conversion, helping the DAC maintain stable signal timing across supported sample rates.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e32-band parametric EQ\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SU-3 includes 32-band fine PEQ for detailed frequency-response adjustment. It can be used to tailor tonal balance for different headphones, speakers, rooms, or listening preferences. EQ settings are retained after power-off so saved adjustments can be recalled after a restart.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBalanced and single-ended outputs\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eRear-panel outputs include balanced XLR and single-ended RCA connections. The balanced outputs are specified at 4 Vrms, while the RCA outputs provide 2 Vrms. This gives the SU-3 direct compatibility with a wide range of powered speakers, headphone amplifiers, preamplifiers, and other line-level audio equipment.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eUSB power filtering\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA dedicated power-filtering stage is designed around USB operation, filtering noise, ripple, and electromagnetic interference from the incoming power supply. The SU-3 consumes less than 5 W during operation and less than 0.1 W in standby.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCompact aluminum chassis\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe anodized aluminum alloy enclosure is CNC machined and measures 4.57 in wide, 1.57 in high, and 3.43 in deep (116 x 40 x 87 mm). At 0.683 lb (310 g), the SU-3 takes up little desk space and can be positioned flat, vertically, or on its side where suitable.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eBroad computer support\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eUSB audio uses asynchronous transmission and supports Windows 7, 8, 8.1, 10, and 11. Compatibility is also specified for macOS X 10.6 or later and Linux.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAKM AK4496 DAC\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eXMOS XU-316 USB audio controller\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePCM support up to 32-bit\/768 kHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDSD support up to DSD512\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e32-band fine PEQ\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDual low-phase-noise femtosecond crystal oscillators\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced XLR line outputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSingle-ended RCA line outputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptical and coaxial digital inputs\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAsynchronous USB audio\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpecified 126 dB XLR dynamic range\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSpecified 126 dB XLR SNR\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompact CNC-machined aluminum chassis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDAC chip: AKM AK4496\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUSB controller: XMOS XU-316\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInputs: USB-C, optical, coaxial\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutputs: Balanced XLR, single-ended RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBalanced output level: 4 Vrms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSingle-ended output level: 2 Vrms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTHD+N: 0.00012% (-118 dB) specified\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDynamic range: 126 dB XLR, 123 dB RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR: 126 dB XLR, 123 dB RCA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUSB transmission: Asynchronous\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUSB bit depth: 1-bit to 32-bit\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptical\/coaxial bit depth: 16-bit to 24-bit\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUSB PCM sampling rate: 44.1 kHz to 768 kHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eUSB DSD sampling rate: 2.8224 MHz to 22.5792 MHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptical\/coaxial sampling rate: 44.1 kHz to 192 kHz\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOperating system support: Windows 7, 8, 8.1, 10, 11, macOS X 10.6 or later, Linux\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePower consumption: Less than 5 W\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eStandby power consumption: Less than 0.1 W\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDimensions: 4.57 x 1.57 x 3.43 in (116 x 40 x 87 mm)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight: 0.683 lb (310 g)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSMSL SU-3 digital-to-analog converter\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SMSL","offers":[{"title":"Default Title","offer_id":50520062132460,"sku":"APS-1441-1","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/2721\/3642\/files\/01-su-3-_0000.png?v=1790175947","url":"https:\/\/apos.audio\/products\/smsl-su-3-desktop-dac","provider":"Apos","version":"1.0","type":"link"}