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Astell&Kern A&ultima SP4000 Flagship Digital Audio Player
USD 4,290.00
HeadAmp
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All Models Now Shipping!Updated: April-09-2026 Built on three years of relentless innovation since the SP3000, the Astell&Kern A&ultima SP4000 pushes the boundaries of portable aud
io with cutting-edge technology and refined sound performance. KEY FEATURES -Enhanced Signal Processing with Octa-Audio Circuitry Design-High Driving Mode Delivers Premium Sound Quality-Proprietary Enhanced Signal Alignment (ESA) Technology Minimizes Group Delay-Ultra Low Noise LDO Regulator for Top-Tier Noise Suppression-Advanced Digital Audio Remaster (DAR) Technology-Full Android OS Support-New 4.5 Generation User Interface What's In the Box • A&ultima SP4000 • Premium German Leather Case • USB-C cable • Quick start guide • microSD card slot cover Features •Stainless Steel 904L Body6" 2K (2160x1080) Touch ScreenOcta-Core CPUAKM4191 x4 + AKM4499EX x4 DAC Chipset (Real Quad DAC)256GB Built-In MemoryMicroSD x1 (Max. 1.5TB)USB Type-C InputUnbalanced 3.5mm Out, Optical 3.5mm Out, Balanced 4.4mm (only 5-pole supported) OutFirmware Upgrade Supported4hrs Charge Time10hrs Playback TimeWindows 10,11(32/64bit) MAC OX X 10.7 Supported Specs • Frequency Response: ±0.006dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.006dB (Condition : 20Hz~20kHz) Balanced ±0.06dB (Condition : 20Hz~70kHz) Unbalanced │ ±0.06dB (Condition : 20Hz~70kHz) Balanced-S/N: 129dB @ 1kHz, Unbalanced │ 131dB @ 1kHz, Balanced-THD+N: 0.0005% @ 1kHz, Unbalanced │ 0.0003% @ 1kHz, Balanced-Crosstalk: -136dB @ 1kHz, Unbalanced │ -145dB @ 1kHz, Balanced-IMD SMPTE: 0.0004% 800Hz 10kHz (4:1) Unbalanced │Balanced-Output Impedance: Unbalanced Out 3.5mm (0.7ohm) │ Balanced Out 4.4mm(1.7ohm)-Clock Jitter: 25pS (Typ), Reference: 200 Femto Seconds-Battery Capacity: 6,780mAh 3.8V Li-Polymer
