{"product_id":"astell-kern-a-ultima-sp4000","title":"Astell\u0026Kern A\u0026ultima SP4000","description":"\u003ch3\u003eAstell\u0026amp;Kern A\u0026amp;ultima SP4000 – Flagship Digital Audio Player\u003c\/h3\u003e\n\u003cp\u003eThe Astell\u0026amp;Kern A\u0026amp;ultima SP4000 represents the pinnacle of portable high-resolution audio, designed for audiophiles seeking uncompromising sound quality. As the successor to the acclaimed SP3000, the SP4000 introduces a new Octa audio circuit architecture, delivering unmatched clarity, detail, and dynamics in a portable player. With its combination of advanced DAC technology, refined circuitry, and luxurious design, it sets a new benchmark in reference-grade digital audio players.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOcta Audio Circuit Architecture:\u003c\/strong\u003e Innovative design with eight DAC chips (AKM4191 x4 + AKM4499EX x4) for true Quad DAC performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced ESA Technology:\u003c\/strong\u003e Proprietary Enhanced Signal Alignment minimizes group delay and improves time-domain accuracy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowerful Output:\u003c\/strong\u003e High Driving Mode delivers 4.1 Vrms unbalanced and 8.2 Vrms balanced for demanding headphones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise Suppression:\u003c\/strong\u003e Ultra Low Noise LDO Regulator and 99.9% pure copper shielding for pristine playback\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Android OS:\u003c\/strong\u003e First Astell\u0026amp;Kern flagship player with open Android system for broader app compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Design:\u003c\/strong\u003e Stainless steel 904L chassis with a 6” 2K touch display and 4.5th gen UI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Wireless Support:\u003c\/strong\u003e Dual-band Wi-Fi, Bluetooth 5.0 with LDAC, aptX HD, LHDC, AAC, and SBC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenerous Storage:\u003c\/strong\u003e 256 GB internal memory plus microSD expansion up to 1.5 TB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eQuick Specs\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC:\u003c\/strong\u003e 4x AKM4191 + 4x AKM4499EX (Quad DAC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCPU:\u003c\/strong\u003e Octa-core\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 6\" 2K (2160 × 1080) touchscreen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Level:\u003c\/strong\u003e 4.1 Vrms unbalanced, 8.2 Vrms balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Support:\u003c\/strong\u003e PCM up to 32-bit\/768 kHz, DSD512 native\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 3.5 mm unbalanced\/optical, 4.4 mm balanced\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless:\u003c\/strong\u003e Wi-Fi 802.11 a\/b\/g\/n\/ac (2.4\/5 GHz), Bluetooth 5.0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Memory:\u003c\/strong\u003e 256 GB NAND\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpandable Memory:\u003c\/strong\u003e microSD (up to 1.5 TB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e 8,000 mAh lithium-ion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 85 × 149.8 × 19.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e approx. 615 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhat’s in the Box\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAstell\u0026amp;Kern A\u0026amp;ultima SP4000\u003c\/li\u003e\n\u003cli\u003eProtective film\u003c\/li\u003e\n\u003cli\u003emicroSD card slot cover\u003c\/li\u003e\n\u003cli\u003eUSB Type-C cable\u003c\/li\u003e\n\u003cli\u003eQuick Start Guide \u0026amp; Warranty Card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eUse Cases \/ Ideal For\u003c\/h4\u003e\n\u003cp\u003eThe SP4000 is ideal for audiophiles, recording professionals, and discerning listeners who demand studio-grade playback on the go. Perfect for high-resolution streaming, reference listening with flagship IEMs and headphones, and use as a high-quality DAC in desktop setups.\u003c\/p\u003e\n\u003ch4\u003ePros \u0026amp; Cons\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e✅ Pros:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClass-leading Octa audio circuit for unmatched sound quality\u003c\/li\u003e\n\u003cli\u003eQuad DAC implementation with ultra-low noise design\u003c\/li\u003e\n\u003cli\u003ePremium stainless steel build with 6” 2K display\u003c\/li\u003e\n\u003cli\u003eFull Android OS for app flexibility\u003c\/li\u003e\n\u003cli\u003eExpandable storage up to 1.5 TB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Cons:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLarge and heavy compared to entry-level DAPs\u003c\/li\u003e\n\u003cli\u003eFlagship performance comes at a premium price\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Astell\u0026amp;Kern A\u0026amp;ultima SP4000 is more than a music player—it is a flagship reference instrument for those who want nothing less than the very best portable audio experience.\u003c\/p\u003e","brand":"Astell\u0026Kern","offers":[{"title":"Black","offer_id":54502650741004,"sku":"AK-SP4000","price":4499.0,"currency_code":"EUR","in_stock":true},{"title":"Silver","offer_id":54502650773772,"sku":"AK-SP4000-SL","price":4499.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0711\/7416\/0652\/files\/audiosanctuary_astellkern_sp4000_2.jpg?v=1760340314","url":"https:\/\/soundium.com\/cs\/products\/astell-kern-a-ultima-sp4000","provider":"Soundium","version":"1.0","type":"link"}