Astell&Kern A&ultima SP4000 High-Resolution Android Portable Music Player

Accepting pre-orders - arrives June 26, 2025. Experience audio in its purest form with the Astell&Kern A&ultima SP4000, a luxury high-resolution music player engineered for serious audiophiles. With its precision-crafted 904L stainless steel body, full Android OS with Google Play, and industry-leading dual DAC architecture, this flagship portable player is designed to satisfy the highest expectations in sound quality, usability, and performance.

Whether you stream lossless tracks on TIDAL or Qobuz, store your FLAC collection locally, or connect high-end headphones, the SP4000 delivers elite-level audio with unmatched detail and power—all from the palm of your hand.

🔊 Key Features & Benefits

• Dual DAC Precision with AK4191 + AK4499EX Per Channel
  Delivers ultra-low distortion, enhanced signal separation, and exceptional soundstage, thanks to independent digital and analog processing per channel.

• High Driving Mode for Maximum Output
  Dual parallel op-amps amplify sound with striking clarity and dynamic range, ideal for high-impedance headphones and in-ear monitors.

• Full Android OS with Google Play Access
  Unlike most audiophile players, the SP4000 gives you native access to your favorite music apps like Spotify, TIDAL, Qobuz, and Apple Music—without sideloading.

• 6" Full HD Touchscreen with Ultra-Smooth UI
  Navigate your library, apps, and settings on a bright 2160×1080 screen with sharp visuals and fluid responsiveness.

• Advanced Signal Tech (ESA & DAR 2.0)
  Reduce phase jitter and digital artifacts using Enhanced Signal Alignment and Astell&Kern’s second-gen Digital Audio Remastering.

• Large Storage with Expansion
  Built-in 256GB flash memory plus a microSD slot supporting up to 1.5TB gives you space for thousands of high-res files.

• Premium Battery Life & Fast Charging
  6,780mAh battery offers up to 10 hours of playback and supports QC 3.0 fast charging for convenience on the go.

📊 Technical Specifications

❓ Frequently Asked Questions

Q: Can I use the SP4000 with TIDAL or Spotify?
Yes. The SP4000 supports native app downloads via Google Play, including TIDAL, Spotify, Qobuz, Apple Music, and others.

Q: Is the SP4000 powerful enough to drive high-impedance headphones?
Absolutely. Its high-output mode and advanced amp design deliver ample power and dynamic range for professional headphones and IEMs.

Q: Does it support USB DAC mode for computers?
Yes. It doubles as a premium desktop DAC when connected to a PC or Mac via USB-C.

Q: Can I expand the storage?
Yes. You can add up to 1.5TB using a microSD card, perfect for massive hi-res music collections.

Q: What’s included in the box?
You’ll receive the SP4000 player, genuine leather case, USB-C cable, screen protectors, microfiber cloth, and documentation.

🧠 Expert Insight

The Astell&Kern A&ultima SP4000 sets a new benchmark in the world of portable audio. It combines elite sound performance with full Android freedom, powerful amplification, and a design that turns heads. From audiophile-grade FLACs to real-time lossless streaming, this player handles it all without compromise. It’s the pinnacle of luxury listening for those who demand nothing but the best.

Astell&Kern A&ultima SP4000 is the ultimate high-end portable music player—built for audiophiles, designed for versatility, and ready for any high-resolution music source you throw at it.