Products

Astell&Kern – A&ultima SP4000 DAP

Our price: £3,799.00

What HFL Thinks

A&ultima SP4000 Player – At HiFi Lounge we are really excited to offer the Astell & Kern portable players to our customers. It was only when I went on holiday recently and took my iPhone that I realised actually how poor the sound quality was and that I now have a large 24-bit library that I couldn’t play so that led me to the Astell&Kern players. These really are a revolution in portable music, not only do they look and sound stunning they are also able to drive high end headphones, plus stream wirelessly from your computer or NAS. These players really do offer high end audio in your pocket like has never been heard before.

Built on Legacy, Evolving Perfection

The A&ultima SP4000 is Astell&Kern’s newest flagship digital audio player, the result of three years of relentless research and innovation following the development of the SP3000. As part of the A&ultima series—Astell&Kern’s flagship line-up combining cutting-edge technology and top-tier specifications—the SP4000 surpasses the boundaries set by the SP3000, once regarded as the ultimate reference. Built upon an advanced Octa audio circuit architecture, the SP4000 distils the purest essence of audio engineering, delivering a sound experience unlike anything before it—refined, powerful, and remarkably close to perfection. Discover the SP4000 and experience sound on an entirely new level.

 

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Specifications

Model – SP4000
Body Color – Black, Silver
Body Material – Stainless Steel 904L
Display – 6inch 2K (2160 x 1080) touch screen
Supported Audio Formats – WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
Sample rate – PCM : 8kHz ~ 768kHz (8/16/24/32bits per Sample) DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), DSD512(1bit, 22.4MHz) Stereo
Output Level – Unbalanced 4.1Vrms │ Balanced 8.2Vrms (Condition No Load)
CPU – Octa-core
DAC – AKM4191 x4 + AKM4499EX x4 (Real Quad DAC)
Decoding – Support up to 32bit / 768kHz Bit to Bit playback
Input – USB Type-C input (for charging & PC & MAC)
Outputs – Unbalanced Out (3.5mm), Optical Out(3.5mm) Balanced Out (2.5mm, only 4-pole supported | 4.4m, only 5-pole supported)
Wi-Fi – 802.11 a/b/g/n/ac (2.4/5GHz)
Bluetooth® – V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)
Dimensions – 3.34” (85mm)[W] x 5.89” (149.8mm)[H] x 0.76” (19.5mm)[D]
Weight – About 21.7oz (615g)
Feature Enhancements – Firmware upgrade supported (OTA: Over-The-Air)
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
Signal to Noise Ratio – 129dB @ 1kHz, Unbalanced │ 131dB @ 1kHz, Balanced
Crosstalk – 136dB @ 1kHz, Unbalanced │ -145dB @ 1kHz, Balanced
THD+N – 0.0005% @ 1kHz, Unbalanced │ 0.0003% @ 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)

Package Contents

Included in the box

  • 1x Astell&Kern A&ultima SP4000 player
  • 1x High-End Shrunken Calfskin Case
  • 1x USB-C to USB-C cable (1 metre)
  • 3x screen protectors
  • 1x Quick start guide

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