{"product_id":"astell-kern-a-ultima-sp4000t-digital-audio-player","title":"Astell\u0026Kern A\u0026ultima SP4000T Digital Audio Player","description":"\u003cp data-start=\"22\" data-end=\"171\" class=\"PDq2pG_selectionAnchorContainer\"\u003eA\u0026amp;ultima SP4000T is the culmination of nearly two years of dedication and exploration, beginning from the planning and development stages of SP3000T.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"173\" data-end=\"495\"\u003eDAC, Tube, and AMP — the essential elements of high-end audio — may be accessible to anyone. Yet even with the same elements, what is ultimately created from them is an entirely different matter. Using the canvas of SP4000, the essence of digital sound, Astell\u0026amp;Kern held onto one defining question over the past two years:\u003c\/p\u003e\n\u003cp data-start=\"497\" data-end=\"554\"\u003e“How can we bring deeper emotion through analogue sound?”\u003c\/p\u003e\n\u003cp data-start=\"556\" data-end=\"814\"\u003eThe answer was drawn with sincerity and endless passion, stroke by stroke. Every trace of that journey is distilled into SP4000T. Astell\u0026amp;Kern’s own analogue sound — comfortable to listen to, yet revealing new depth and character the longer you experience it.\u003c\/p\u003e\n\u003cp data-start=\"556\" data-end=\"814\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2792\/5768\/files\/Astell_KernSP4000Tsmall.jpg?v=1783427917\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"816\" data-end=\"863\"\u003eDiscover it for yourself with A\u0026amp;ultima SP4000T.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1tm5wqj\" data-start=\"865\" data-end=\"890\"\u003eRAYTHEON JAN6418 Quad\u003c\/h3\u003e\n\u003cp data-start=\"892\" data-end=\"1123\"\u003eThe SP4000T is the industry's first portable player to feature four MIL-Spec vintage Raytheon JAN6418 vacuum tubes in a dual-channel, symmetrical Quad configuration — a design previously exclusive to high-end home audio amplifiers.\u003c\/p\u003e\n\u003cp data-start=\"1125\" data-end=\"1364\"\u003eTo overcome the challenges of managing multiple highly sensitive tubes, Astell\u0026amp;Kern precisely pairs each valve by noise and gain characteristics, isolating them on independent flexible PCBs to completely eliminate microphonic interference.\u003c\/p\u003e\n\u003cp data-start=\"1366\" data-end=\"1605\"\u003eOperating in a mirrored differential setup, these four tubes work in perfect balance to cancel out common-mode noise while doubling sonic clarity, delivering the richest, most resonant analogue harmonics ever achieved in a portable player.\u003c\/p\u003e\n\u003ch3 data-section-id=\"11lzk89\" data-start=\"1607\" data-end=\"1628\"\u003eTriple Amp System\u003c\/h3\u003e\n\u003cp data-start=\"1630\" data-end=\"1810\"\u003ePowered by Astell\u0026amp;Kern's exclusive TERATON ALPHA technology, the SP4000T seamlessly fuses rich analogue warmth with modern digital dynamics through its signature Triple Amp System.\u003c\/p\u003e\n\u003cp data-start=\"1812\" data-end=\"1910\"\u003eUsers can freely switch between three distinct sonic profiles to match their music and headphones:\u003c\/p\u003e\n\u003cp data-start=\"1912\" data-end=\"2073\"\u003e\u003cstrong data-start=\"1912\" data-end=\"1928\"\u003eOP AMP Mode:\u003c\/strong\u003e\u003cbr data-start=\"1928\" data-end=\"1931\"\u003eDelivers Astell\u0026amp;Kern's pinnacle signature clarity, massive soundstage width, and distortion-free, high-resolution dynamics across every genre.\u003c\/p\u003e\n\u003cp data-start=\"2075\" data-end=\"2288\"\u003e\u003cstrong data-start=\"2075\" data-end=\"2093\"\u003eTUBE AMP Mode:\u003c\/strong\u003e\u003cbr data-start=\"2093\" data-end=\"2096\"\u003eActivates the Quad-configured real vacuum tubes, delivering the irreplaceable, emotionally deep, and velvety analogue texture of classic valve amplification alongside groundbreaking low noise.\u003c\/p\u003e\n\u003cp data-start=\"2290\" data-end=\"2536\"\u003e\u003cstrong data-start=\"2290\" data-end=\"2310\"\u003eHYBRID AMP Mode:\u003c\/strong\u003e\u003cbr data-start=\"2310\" data-end=\"2313\"\u003eA next-generation hybrid engine featuring a 5-stage adjustment slider, allowing you to seamlessly blend the organic soul of tube warmth with the crisp resolution of solid-state playback to dial in your perfect custom sound.\u003c\/p\u003e\n\u003ch3 data-section-id=\"h3ceyt\" data-start=\"2538\" data-end=\"2592\"\u003e2nd Generation Anti-Microphonic Noise Architecture\u003c\/h3\u003e\n\u003cp data-start=\"2594\" data-end=\"2744\"\u003eThe greatest technical challenge in applying vacuum tubes to a compact portable device is achieving low noise even at high resolution and high output.\u003c\/p\u003e\n\u003cp data-start=\"2746\" data-end=\"3027\"\u003eThe SP4000T features twice as many tubes as its predecessor — four in total — and introduces an upgraded 5-stage 2nd Generation Architecture (up from the previous 4-stage design) to suppress microphonic noise, which is generated in vacuum tubes from even minor external vibrations.\u003c\/p\u003e\n\u003cp data-start=\"3029\" data-end=\"3244\"\u003eDrawing on Astell\u0026amp;Kern's proprietary know-how and years of experience, repeated rounds of design, testing, and verification led to the optimal solution for overcoming the structural limitations of microphonic noise.\u003c\/p\u003e\n\u003ch3 data-section-id=\"fjlnqa\" data-start=\"3246\" data-end=\"3278\"\u003eHEXA Audio Circuit Structure\u003c\/h3\u003e\n\u003cp data-start=\"3280\" data-end=\"3510\"\u003eThe SP4000T integrates dual AK4499EX DACs — AKM’s latest flagship, proven across Astell\u0026amp;Kern devices — paired with dedicated AK4191EQ processors for each left and right channel, forming a fully discrete audio circuit architecture.\u003c\/p\u003e\n\u003cp data-start=\"3512\" data-end=\"3833\"\u003eUnlike conventional DAPs that handle both digital and analogue signals inside the DAC, the SP4000T's audio circuit uses a dedicated digital delta-sigma modulator (AK4191EQ) to reduce noise in the digital signal before passing it to a completely isolated analogue DAC (AK4499EX) for independent analogue signal processing.\u003c\/p\u003e\n\u003cp data-start=\"3512\" data-end=\"3833\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2792\/5768\/files\/Astell_KernSP4000Tsmall_1.jpg?v=1783427918\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"3835\" data-end=\"4005\"\u003eBuilt on this physically complete separation of digital and analogue signal paths, the SP4000T's signature analogue sound is realised with greater depth than ever before.\u003c\/p\u003e\n\u003ch3 data-section-id=\"ppge02\" data-start=\"4007\" data-end=\"4028\"\u003eHigh Driving Mode\u003c\/h3\u003e\n\u003cp data-start=\"4030\" data-end=\"4148\"\u003eThe SP4000T inherits the acclaimed High Driving Mode from the SP4000, which has been praised by audiophiles worldwide.\u003c\/p\u003e\n\u003cp data-start=\"4150\" data-end=\"4510\"\u003eWith twice as many OPAMPs arranged horizontally, it delivers even greater sonic density. Like a four-wheel-drive vehicle conquering rough terrain, High Driving Mode channels superior driving power to produce a stronger, more stable sound — precisely articulating even the most easily missed sonic details and creating a deeper, more vivid listening experience.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1epu7ho\" data-start=\"4512\" data-end=\"4531\"\u003eProprietary ESA\u003c\/h3\u003e\n\u003cp data-start=\"4533\" data-end=\"4692\"\u003eThe SP4000T dramatically improves Group Delay — one of audio's most persistent challenges — through its proprietary ESA (Enhanced Signal Alignment) technology.\u003c\/p\u003e\n\u003cp data-start=\"4694\" data-end=\"4839\"\u003eESA aligns frequency signals so they arrive more uniformly, minimising frequency distortion and delivering sound with greater clarity and purity.\u003c\/p\u003e\n\u003ch3 data-section-id=\"3omqzz\" data-start=\"4841\" data-end=\"4857\"\u003eAdvanced DAR\u003c\/h3\u003e\n\u003cp data-start=\"4859\" data-end=\"5023\"\u003eThe SP4000 introduces Advanced DAR, Astell\u0026amp;Kern’s second-generation DAR (Digital Audio Remaster) technology, delivering sound that is even more natural and refined.\u003c\/p\u003e\n\u003cp data-start=\"5025\" data-end=\"5221\"\u003eRather than sending the audio file directly to the DAR engine, the SP4000 first uses VSE (Virtual Sound Extender) to virtually restore lost harmonics, enhancing sound quality at the initial stage.\u003c\/p\u003e\n\u003cp data-start=\"5223\" data-end=\"5470\"\u003eThe advanced DAR engine then performs a second-stage upsampling process with greater precision and completeness. This two-step approach allows listeners to enjoy a deeper, more immersive sound that comes closer than ever to the original recording.\u003c\/p\u003e\n\u003ch3 data-section-id=\"19kh4gh\" data-start=\"5472\" data-end=\"5499\"\u003eAstell\u0026amp;Kern Direct Path\u003c\/h3\u003e\n\u003cp data-start=\"5501\" data-end=\"5776\"\u003eADP (Astell\u0026amp;Kern Direct Path) — Astell\u0026amp;Kern's proprietary customisation technology — bypasses the Sample Rate Conversion (SRC) limitation inherent to the Android OS, enabling lossless bit-perfect playback even in streaming environments for the highest possible audio quality.\u003c\/p\u003e\n\u003cp data-start=\"5778\" data-end=\"5960\"\u003eKeeping pace with the shift towards streaming-centric listening, the SP4000T runs the latest Android 15, delivering top-tier analogue sound quality alongside exceptional convenience.\u003c\/p\u003e\n\u003ch3 data-section-id=\"lh3vqr\" data-start=\"5962\" data-end=\"5990\"\u003eThe Premium Leather Case\u003c\/h3\u003e\n\u003cp data-start=\"5992\" data-end=\"6176\"\u003eThe bundled leather case for the SP4000T was crafted using 'MINERVA' leather from 'BADALASSI CARLO', a renowned leather workshop located in the San Miniato district of Florence, Italy.\u003c\/p\u003e\n\u003cp data-start=\"6178\" data-end=\"6428\"\u003eBadalassi Carlo is a tannery that has been producing leather for over 40 years, combining traditional Tuscan vegetable tanning methods with the theories and techniques of CARLO BADALASSI, a former leather-school professor from the Santa Croce region.\u003c\/p\u003e\n\u003cp data-start=\"6430\" data-end=\"6768\"\u003eVegetable tanning is an eco-friendly leather-making process — slow and time-intensive — that tans hides using only plant-derived tannin extracts. Badalassi Carlo leathers employ the Tuscan vacchetta technique, where bovine bone powder-derived tallow is added during the vegetable oil tanning process after removing the hair from the hide.\u003c\/p\u003e\n\u003cp data-start=\"6770\" data-end=\"6960\"\u003ePursuing small-batch, high-quality production over mass output, the workshop is highly regarded as the preferred leather artisan for renowned brands that place a premium on material quality.\u003c\/p\u003e\n\u003cp data-start=\"6962\" data-end=\"7147\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThe case is available in 'Cognac' colour and wraps snugly around the entire device, offering a perfect fit while featuring a rear pattern cut-out designed to showcase the tube LED glow.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 1126.85px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eSP4000T (PPF52)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eBody Colour:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eSilver, Copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eBody Material:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eStainless Steel, Copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eDisplay:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e6-inch 2K (2160 x 1080) touch screen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eSupported Audio Formats:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eWAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 78.375px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 78.375px;\"\u003e\u003cstrong\u003eSample Rate:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 78.375px;\"\u003ePCM: 8kHz ~ 768kHz (8\/16\/24\/32 bits per sample) | DSD Native: DSD64 (1-bit 2.8MHz), Stereo \/ DSD128 (1-bit 5.6MHz), Stereo \/ DSD256 (1-bit 11.2MHz), Stereo \/ DSD512 (1-bit 22.4MHz), Stereo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eOutput Level:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eUnbalanced 4.2Vrms | Balanced 8Vrms (Condition: No Load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eCPU:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eOcta-Core\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eDAC:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eAKM4191EQ x2 + AKM4499EX x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eVacuum Tube:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eRAYTHEON JAN6418 x4 (Quad Tube)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eDecoding:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eSupports up to 32-bit \/ 768kHz bit-to-bit playback\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eInput:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eUSB Type-C input (for charging, PC and Mac)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eOutputs:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eUnbalanced Out (3.5mm), Optical Out (3.5mm) | Balanced Out (4.4mm, only 5-pole supported)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eWi-Fi:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e802.11 a\/b\/g\/n\/ac\/ax (2.4\/5GHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eBluetooth®:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eV5.2 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e3.37” (85.7mm) [W] x 5.9” (150mm) [H] x 0.76” (19.5mm) [D]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eApproximately 19.93oz (565g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eFeature Enhancements:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eFirmware upgrade supported (OTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003e0℃ ~ +40℃ (32℉ ~ 104℉)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eAudio Performance:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 78.375px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 78.375px;\"\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 78.375px;\"\u003e±0.006dB (Condition: 20Hz~20kHz) Unbalanced | ±0.006dB (Condition: 20Hz~20kHz) Balanced±0.06dB (Condition: 20Hz~70kHz) Unbalanced | ±0.06dB (Condition: 20Hz~70kHz) Balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eSignal To Noise Ratio:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003e124dB @ 1kHz, Unbalanced | 125dB @ 1kHz, Balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eCrosstalk:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e-136dB @ 1kHz, Unbalanced | -145dB @ 1kHz, Balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eTHD+N:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e0.0006% @ 1kHz, Unbalanced | 0.0004% @ 1kHz, Balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eIMD SMPTE:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e0.0004% 800Hz 10kHz (4:1), Unbalanced | Balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eUnbalanced Out 3.5mm (0.7ohm) | Balanced Out 4.4mm (1.7ohm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eClock Source:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eClock Jitter:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e25pS (Typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eReference Clock Jitter:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003e200 Femto Seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eBattery:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eCapacity:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e7,450mAh 3.8V Li-Polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 39.1875px;\"\u003e\u003cstrong\u003eContinuous Playback Time:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 39.1875px;\"\u003eApproximately 10 hours (Standard: FLAC, 16-bit, 44.1kHz, Volume 80, LCD Off, Low Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eCharge Time:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eApproximately 5 hours (PD3.0 Charging)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eStorage:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eBuilt-In Memory:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e256GB [NAND]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eExternal Memory:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003emicroSD x1 (Maximum 1.5TB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eOS:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 19.5938px;\"\u003e\u003cstrong\u003eSupported OS:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 19.5938px;\"\u003eWindows 10, 11 (32\/64-bit), Mac OS X 10.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 28.095%; height: 58.7812px;\"\u003e\u003cstrong\u003eIncluded In The Box:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.544%; height: 58.7812px;\"\u003e\n\u003cp\u003e1x Astell\u0026amp;Kern A\u0026amp;ultima SP4000T player\u003c\/p\u003e\n\u003cp\u003e1x Premium Badalassi Carlo Minerva Case\u003c\/p\u003e\n\u003cp\u003e1x USB-C to USB-C cable (1 metre)\u003c\/p\u003e\n\u003cp\u003e3x Screen protectors\u003c\/p\u003e\n\u003cp\u003e1x Quick start guide\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astell\u0026Kern","offers":[{"title":"Silver","offer_id":56752180855170,"sku":"AKP28","price":3199.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2792\/5768\/files\/Astell_KernSP4000Tsilver.jpg?v=1783427917","url":"https:\/\/dougbradyhifi.com\/products\/astell-kern-a-ultima-sp4000t-digital-audio-player","provider":"Doug Brady HiFi","version":"1.0","type":"link"}