{"product_id":"s-m-s-l-d400-mk2","title":"S.M.S.L D400 MK2 Flagship AK4191 + AK4499EX Audio DAC | OCXO Clock inside","description":"\u003cp\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sfd3d4c6c507b4588ba99558aa303abd5f.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sdb74c7cf6c214296a111f88e1b13e1d4j.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S433d74137d6b4c4f8219025b14224aa2R.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S338b3ae9539749dc843d94cd02d4b7c80.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S77d60ed1b84d4f528e016b5bb2d2c651H.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S37fde12a925f4dfdbb95230bb9a3a9d0o.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Se2bcb4397e524c94987fcfe4e343b283s.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sd98a6f0778234f27919c53aa82b65943q.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Scef48b4d90b8406393dc7f99de238613O.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S757be09d7a874432a6c56fb2a35439d83.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sa596ac51b2584e92aaa2b897d5f227ceh.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S15f54cc8487a47f589255dfee7dbb2ccj.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S9e7dbdcb3036439d9611746a01bb3bc0e.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S28e88a51e8624b3b894601a2486a0989L.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S296d885536ba4e3e9d7d9a54432d3d065.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S5c88006b9f204e41a89b94cd7361cdfez.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sf2662e93501446ceba3096d944f3b4e51.jpg\"\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S8d4d9d9315ac4eaf90830009de08c2f4a.jpg\"\u003e\u003c\/p\u003e\n\u003ch2\u003eS.M.S.L D400 MK2 Flagship Audio DAC\u003c\/h2\u003e\n\u003cp\u003eThe S.M.S.L D400 MK2 represents the pinnacle of modern digital-to-analog conversion, combining state-of-the-art flagship silicon with uncompromising audio engineering. \u003cspan class=\"citation-257 citation-end-257\"\u003eDesigned for discerning audiophiles and high-end desktop setups, it delivers master-grade resolution, ultra-low distortion, and an expansive soundstage that brings every nuance of your music to life.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"citation-257 citation-end-257\"\u003e\u003cspan class=\"citation-256 citation-end-256\"\u003eFlagship AK4191 and AK4499EX DAC Architecture\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-257 citation-end-257\"\u003e\u003cspan class=\"citation-256 citation-end-256\"\u003e\u003cspan class=\"citation-255 citation-end-255\"\u003eAt the heart of the D400 MK2 is AKM’s premier dual-chip architecture, utilizing the AK4191 digital filter paired with the AK4499EX DAC, driven by the third-generation XMOS XU-316 processor.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e By physically separating the digital processing from the analog conversion stage, this design drastically reduces noise interference and digital jitter. The result is an exceptionally pure, transparent, and lifelike audio reproduction with pinpoint imaging and rich textural detail.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eUltra-Low Phase Noise OCXO Clock\u003c\/h3\u003e\n\u003cp\u003eTo ensure absolute signal integrity, the D400 MK2 incorporates a built-in high-precision 10MHz OCXO (Oven-Controlled Crystal Oscillator) with ±5ppb stability, paired with SMSL's self-developed CK-04 clock processing circuit. These specialized systems maintain extreme thermal stability, virtually eliminating phase noise and ensuring master-clock precision.\u003c\/p\u003e\n\u003ch3\u003eMQA and High-Resolution Audio Decoding\u003c\/h3\u003e\n\u003cp\u003eThe D400 MK2 provides comprehensive hardware support for the industry's most demanding formats. \u003cspan class=\"citation-254 citation-end-254\"\u003eIt natively decodes PCM audio up to 32-bit\/768kHz and Direct Stream Digital up to DSD512.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e Additionally, full MQA and MQA-CD decoding capabilities allow listeners to stream or play back studio-original master recordings precisely as the artist intended.\u003c\/p\u003e\n\u003ch3\u003eHigh-Performance Qualcomm Bluetooth Connectivity\u003c\/h3\u003e\n\u003cp\u003eEquipped with a flagship Qualcomm Bluetooth chipset, the D400 MK2 supports high-definition wireless streaming protocols including LDAC (24-bit\/96kHz), aptX HD, aptX, AAC, and SBC. This ensures that users can enjoy seamless, high-resolution wireless audio from smartphones, tablets, or laptops without sacrificing sonic fidelity.\u003c\/p\u003e\n\u003ch3\u003eVersatile Balanced and Single-Ended Outputs\u003c\/h3\u003e\n\u003cp\u003eTo integrate effortlessly into any audio system, the D400 MK2 features professional-grade analog outputs complete with ultra-low distortion metrics.\u003c\/p\u003e\n\u003cdiv class=\"code-block ng-tns-c2722667880-29 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation\"\u003e\n\u003cdiv class=\"formatted-code-block-internal-container ng-tns-c2722667880-29\"\u003e\n\u003cdiv class=\"animated-opacity ng-tns-c2722667880-29\"\u003e\n\u003ch3\u003ePremium CNC Aluminum Construction\u003c\/h3\u003e\n\u003cp\u003eThe chassis is precision-milled from a solid block of high-grade aluminum using advanced CNC machining and features a fully laminated tempered glass color IPS display. This robust enclosure not only offers a sleek, modern aesthetic but also provides exceptional structural rigidity and superior shielding against external electromagnetic interference (EMI\/RFI).\u003c\/p\u003e\n\u003ch3\u003eComprehensive Digital Connectivity\u003c\/h3\u003e\n\u003cp\u003eDesigned as the ultimate command center for digital audio sources, the D400 MK2 offers a full array of digital inputs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp id=\"p-rc_4581b249af90b0fe-102\"\u003e\u003cspan class=\"citation-253 citation-end-253\"\u003eUSB Input: Powered by XMOS XU-316 supporting high-resolution PCM and native DSD.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptical \u0026amp; Coaxial Inputs: Ideal for connecting televisions, game consoles, or digital transports.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAES\/EBU \u0026amp; I2S Inputs: Provides professional balanced digital and jitter-free direct digital interfaces.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp id=\"p-rc_4581b249af90b0fe-101\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"citation-252 citation-end-252\"\u003eAbout SMSL\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eFoshan ShuangMuSanLin Electronics Co., Ltd. (SMSL) is an established manufacturer in high-fidelity desktop audio. Specializing in digital-to-analog converters, balanced headphone amplifiers, and power amps, SMSL has built a global reputation for combining rigorous bench performance, clean industrial design, and practical feature sets across various price tiers.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp id=\"p-rc_4581b249af90b0fe-104\"\u003eInput: USB \/ Optical \/ Coaxial \/ Bluetooth \/ AES \/ I2S\u003cbr\u003eOutput: XLR \/ RCA\u003cbr\u003eTHD+N: 0.00006% (-124dB)\u003cbr\u003eUSB Compatibility: Windows 7\/8\/8.1\/10\/11, Mac OS X, Linux\u003cbr\u003e\u003cspan class=\"citation-251 citation-end-251\"\u003eBluetooth Support: LDAC (24-bit\/96kHz), aptX HD, aptX, SBC, AAC\u003cbr\u003e\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan class=\"citation-250 citation-end-250\"\u003eSampling Rate (USB\/I2S\/AES): PCM up to 32-bit\/768kHz, DSD up to DSD512\u003cbr\u003e\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003eSampling Rate (Optical\/Coaxial): PCM up to 24-bit\/192kHz, DSD64 (DoP)\u003cbr\u003eClock: 10MHz OCXO (±5ppb)\u003cbr\u003eDisplay: Tempered glass full-laminated color IPS screen \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003eQ\u0026amp;A\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat DAC chips does the SMSL D400 MK2 use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt uses flagship AKM chips consisting of 1x AK4191 and 1x AK4499EX.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the clock system inside the D400 MK2?\u003c\/strong\u003e\u003cbr\u003eIt features a built-in 10MHz OCXO crystal oscillator with ±5ppb stability and a CK-04 clock circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the D400 MK2 support Bluetooth streaming? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-246 citation-end-246\"\u003eYes, it features a high-end Qualcomm Bluetooth chip supporting LDAC (24-bit\/96kHz), aptX HD, and more.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"citation-246 citation-end-246\"\u003eWhat is the maximum sampling rate supported via USB? \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-246 citation-end-246\"\u003e\u003cspan class=\"citation-245 citation-end-245\"\u003ePCM up to 32-bit\/768kHz and native DSD up to DSD512.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"citation-246 citation-end-246\"\u003e\u003cspan class=\"citation-245 citation-end-245\"\u003e\u003cstrong\u003eDoes the unit feature balanced outputs?\u003c\/strong\u003e\u003cbr\u003eYes, it comes with high-quality balanced XLR and single-ended RCA analog outputs.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp id=\"p-rc_4581b249af90b0fe-104\"\u003e\u003c\/p\u003e\n\u003cp id=\"p-rc_4581b249af90b0fe-98\"\u003e\u003c\/p\u003e","brand":"SMSL","offers":[{"title":"SMSL-D400-Silver","offer_id":67766651650352,"sku":"SMSL-D400-Silver","price":649.0,"currency_code":"USD","in_stock":true},{"title":"SMSL-D400-black","offer_id":67766651683120,"sku":"SMSL-D400-black","price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0915\/6712\/8880\/files\/Saf44d8d18a514e20a9d2576923212a49R_1.webp?v=1789036688","url":"https:\/\/aehifi.com\/products\/s-m-s-l-d400-mk2","provider":"AEHIFI SHOP","version":"1.0","type":"link"}