{"product_id":"astell-kern-sp4000t-digital-audio-player-dap","title":"Astell\u0026Kern SP4000T Digital Audio Player (DAP)","description":"\u003cp\u003eThe \u003cstrong\u003eAstell\u0026amp;Kern SP4000T\u003c\/strong\u003e is a flagship portable digital audio player (DAP) designed to bridge the warmth of analogue sound with digital precision. As the first DAP to feature four Raytheon JAN6418 vacuum tubes, the SP4000T offers three distinct tube sound signatures (Triode, Ultra Linear, and Pentode) alongside a Triple Amplifier System that lets users toggle between Tube Amp, OP Amp, and Hybrid Amp modes. Built with a dual-DAC setup utilizing dual AKM AK4191EQ modulators and dual AKM AK4499EX DACs, it provides complete separation between digital and analogue signal paths for ultra-low noise performance.\u003c\/p\u003e\n\n\u003cp\u003eHoused in a precision stainless steel and copper chassis with a multi-layer vibration isolation system, the SP4000T features a 6-inch 2K (2160 x 1080) touchscreen and runs on an open Android OS with Astell\u0026amp;Kern's Direct Path technology for bit-perfect streaming. Supporting PCM up to 32-bit\/768kHz and native DSD512 decoding, it offers High Driving Mode for demanding headphones, Wi-Fi 6, Bluetooth 5.2 with LDAC\/LHDC\/aptX HD support, and balanced 4.4mm output. Each unit includes a handcrafted Italian vegetable-tanned leather case.\u003c\/p\u003e\n\n\u003ch3\u003eKEY FEATURES \u0026amp; PROPRIETARY TECHNOLOGIES\u003c\/h3\u003e\n\n\u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eQuad Raytheon JAN6418 Vacuum Tubes:\u003c\/strong\u003e Incorporates four vintage military-grade vacuum tubes to deliver natural analogue warmth, harmonic richness, and expansive soundstaging.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTriple Tube Sound Modes:\u003c\/strong\u003e Select between Triode Mode (warm \u0026amp; rich), Ultra Linear Mode (balanced \u0026amp; detailed), or Pentode Mode (dynamic \u0026amp; energetic).\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTriple Amplifier System:\u003c\/strong\u003e Allows switching between Tube Amp Mode for pure analogue character, OP Amp Mode for maximum resolution, and Hybrid Amp Mode for blended precision.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDual AKM AK4191EQ + AK4499EX Architecture:\u003c\/strong\u003e Complete separation of digital processing and analogue conversion stages to minimize jitter and background noise.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHigh Driving Mode \u0026amp; Advanced Damping:\u003c\/strong\u003e Delivers elevated voltage output (up to 8.0Vrms balanced) for hard-to-drive headphones while floating microphonic tube damping protects signal purity.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOpen Android Platform \u0026amp; Wireless Connectivity:\u003c\/strong\u003e Powered by an octa-core CPU running open Android with Wi-Fi 6, Bluetooth 5.2 (LDAC, LHDC, aptX HD), Roon Ready integration, and Qobuz Connect.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\n\n\u003ctable style=\"width: 100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eDetail\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Category\u003c\/td\u003e\n      \u003ctd\u003eFlagship Portable Hi-Res Digital Audio Player (DAP)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBrand \/ Model\u003c\/td\u003e\n      \u003ctd\u003eAstell\u0026amp;Kern SP4000T (PPF52)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eChassis Construction\u003c\/td\u003e\n      \u003ctd\u003eStainless Steel \u0026amp; Copper Housing\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDisplay\u003c\/td\u003e\n      \u003ctd\u003e6-inch 2K Touchscreen (2160 x 1080 Resolution)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCPU \/ Storage\u003c\/td\u003e\n      \u003ctd\u003eOcta-Core CPU | 256GB NAND Flash Internal (microSD up to 1.5TB)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOperating System\u003c\/td\u003e\n      \u003ctd\u003eOpen Android OS with Bit-Perfect Direct Path\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDAC Configuration\u003c\/td\u003e\n      \u003ctd\u003eDual AKM AK4191EQ Modulators + Dual AKM AK4499EX DACs\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVacuum Tubes\u003c\/td\u003e\n      \u003ctd\u003e4 x Raytheon JAN6418 Vacuum Tubes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTube \u0026amp; Amp Modes\u003c\/td\u003e\n      \u003ctd\u003eTube Modes: Triode, Ultra Linear, Pentode\u003cbr\u003eAmp Modes: Tube AMP, OP AMP, Hybrid AMP\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHigh-Res Audio Support\u003c\/td\u003e\n      \u003ctd\u003ePCM up to 32-bit \/ 768kHz | Native DSD512 (22.4MHz)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Levels\u003c\/td\u003e\n      \u003ctd\u003eUnbalanced: 4.2Vrms | Balanced: 8.0Vrms (Condition: No Load)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSignal-to-Noise Ratio (SNR)\u003c\/td\u003e\n      \u003ctd\u003eUnbalanced: 124 dB | Balanced: 125 dB (@ 1kHz)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCrosstalk \/ THD+N\u003c\/td\u003e\n      \u003ctd\u003eCrosstalk: -136dB (Unbal) \/ -145dB (Bal) | THD+N: 0.0006% (Unbal) \/ 0.0004% (Bal)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Impedance\u003c\/td\u003e\n      \u003ctd\u003e3.5mm Unbalanced: 0.7 Ω | 4.4mm Balanced: 1.7 Ω\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHeadphone \/ Digital Outputs\u003c\/td\u003e\n      \u003ctd\u003e1 x 3.5mm Unbalanced \/ Optical Out, 1 x 4.4mm Balanced (5-pole)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eUSB Interface\u003c\/td\u003e\n      \u003ctd\u003eUSB Type-C (Charging, Data Transfer, USB DAC Mode)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eWireless Connectivity\u003c\/td\u003e\n      \u003ctd\u003eWi-Fi 6 (802.11 ax, Dual-Band 2.4\/5GHz) | Bluetooth 5.2 (LDAC, LHDC, aptX HD, AAC, SBC)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBattery Capacity \u0026amp; Playtime\u003c\/td\u003e\n      \u003ctd\u003e7,450mAh 3.8V Li-Polymer | Up to 10 Hours Playtime | USB PD 3.0 Fast Charge (~5 hours)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDimensions \u0026amp; Weight\u003c\/td\u003e\n      \u003ctd\u003e85.7 x 150 x 19.5 mm | Approx. 544 g\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eIncluded Accessories\u003c\/td\u003e\n      \u003ctd\u003eHandcrafted Italian Leather Case, USB Type-C Cable, Quick Start Guide\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Astell\u0026Kern","offers":[{"title":"No","offer_id":53776172646666,"sku":"ASKE-SP4000T-S-1","price":3199.0,"currency_code":"GBP","in_stock":true},{"title":"Yes, BADALASSI CARLO Cognac Leather Case","offer_id":53776172679434,"sku":"ASKE-SP4000T-S-2","price":3199.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/3283\/6618\/files\/astell-kern-sp4000t-digital-audio-player-_3_-52028-p_116a4f3e-cba1-456a-95f6-948311df6362.png?v=1789921550","url":"https:\/\/audioemotion.co.uk\/products\/astell-kern-sp4000t-digital-audio-player-dap","provider":"Audio Emotion Limited","version":"1.0","type":"link"}