Astell&Kern A&ultima SP4000 – The new benchmark for portable high-end audio players

Reference class for uncompromising music enjoyment

With the Astell&Kern A&ultima SP4000, Astell&Kern presents its most powerful high-end digital audio player (DAP) to date. As the successor to the multi-award-winning SP3000, the SP4000 combines state-of-the-art audio technology, uncompromising engineering, and luxurious materials into a mobile music player of the absolute top class.

Whether high-resolution music files or lossless streaming – the SP4000 delivers exceptionally detailed, dynamic, and authentic sound reproduction that satisfies even the highest audiophile demands.

New Octa-Audio architecture for maximum sound purity

The heart of the A&ultima SP4000 is the completely newly developed Octa-Audio architecture. For the first time, each AK4191 digital processor works directly with an AK4499EX DAC, forming a true quad-DAC configuration.

Through the consistent separation of digital signal processing and analog conversion, interference and signal loss are effectively minimized. The result is an exceptionally clean sound with impressive transparency, finest detail resolution, and an exceptionally precise spatial imaging.

High Driving Mode – Maximum power for demanding headphones

Thanks to an elaborately developed parallel operational amplifier circuit, the SP4000 offers significantly more power reserves without increasing the noise floor.

Even high-impedance and power-hungry high-end headphones are driven with ease and benefit from enormous dynamics, powerful bass reproduction, and the finest musical nuances.

ESA technology for perfect signal timing

With the exclusive Enhanced Signal Alignment (ESA) technology, Astell&Kern eliminates propagation delay differences between different frequency ranges.

All signals arrive at the output at the same time, ensuring:

• more precise stereo imaging

• more natural vocals

• improved spaciousness

• exceptional sound coherence

The listening experience feels significantly more realistic and vivid.

Extremely low-noise power supply

A newly developed low-dropout regulator (LDO) reduces voltage noise by up to 97% compared to the previous generation.

Originating from medical and 5G technology, this power supply ensures maximum stability and creates ideal conditions for undistorted music reproduction with maximum detail accuracy.

DAR Gen2 & VSE – High-resolution sound for every recording

The SP4000 is the first model with the new Digital Audio Remaster (DAR) Generation 2.

Together with the Virtual Sound Extender (VSE) technology, lost overtones are reconstructed and the music signal is subsequently recalculated with high precision. This results in more naturalness, more harmonious timbres, and an even more authentic playback – regardless of the original recording quality.

Bit-perfect Android streaming

For the first time, Astell&Kern is relying on a full Android operating system with Google Play Store. Favorite services like TIDAL, Qobuz, or Apple Music can be installed directly.

The specially developed Direct Path (ADP) technology completely bypasses the audio limitations of Android and enables bit-perfect, lossless playback, even when streaming.

High-quality materials for uncompromising performance

The SP4000 also sets new standards in terms of construction:

• HDI circuit board for shortest signal paths

• Shielding housing made of 99.9% pure copper against electromagnetic interference

• 6-inch Full HD touch display (2160 × 1080 pixels)

high-quality workmanship with maximum precision

The result is not only excellent sound quality, but also an exceptionally high-quality haptic feel and durability.

New Generation 4.5 user interface

The completely revised user interface combines elegant design with intuitive operation.

A new vinyl-style album browser, fluid animations, and the striking Crimson design ensure a modern user experience and consistently put the music at the center.

Exclusive leather case by Perlinger

Included in the scope of delivery is a high-quality leather case by Perlinger from Germany.

The hand-finished calfskin is produced in an elaborate tanning process and impresses with exceptional durability, a refined haptic feel, and a characteristic surface structure. It optimally protects the SP4000 and underlines its exclusive premium claim.

Highlights of the Astell&Kern A&ultima SP4000

• Reference digital audio player of the A&ultima series

• New Octa-Audio architecture with four AK4499EX DACs

• High Driving Mode for maximum headphone performance

• ESA technology for perfect signal timing and spaciousness

• LDO power supply with up to 97% less noise

• DAR Gen2 and VSE for high-resolution sound optimization

• Android with Google Play Store and bit-perfect streaming

• 6-inch Full HD touch display

• HDI circuit board and copper shielding

• Premium leather case by Perlinger (Made in Germany)

The Astell&Kern A&ultima SP4000 sets new standards in the field of portable high-end audio players and combines state-of-the-art audio technology, uncompromising sound quality, and luxurious design into a mobile music player of the absolute reference class.

Astell&Kern SP4000 specifications:

· Storage: 256 GB internal memory plus microSD card support up to 1.5 TB – ideal for extensive music collections.
· Wi-Fi: Dual-band 2.4/5 GHz (802.11 a/b/g/n/ac).
· Connections: USB-C, USB-DAC function, DLNA and USB audio output.
· Display: 6.0-inch Full HD touchscreen with a resolution of 2160 × 1080 pixels.
· Audio formats: Supports PCM up to 32-bit/768 kHz as well as native DSD512.
· ReplayGain: Automatic volume adjustment for consistent playback of all tracks.
· File transfer: Wireless transfer over the network with AK File Drop.
· Bluetooth: Supports aptX™ Adaptive and LDAC™ for high-resolution wireless audio.
· BT Sink mode: Use the SP4000 as a Bluetooth DAC for external audio devices.
· Battery life: Up to 10 hours of continuous music playback.
· Fast charging: Qualcomm QC 3.0 fast charging – full charge in approx. 4 hours.
· Crossfeed function: Optimized stereo imaging for a more natural headphone listening experience.
· Roon Ready: Final certification by Roon Labs is currently still pending.

Herstellerangaben:

Dreamus Company | Astell&Kern Unit
5, Bangbae-ro 18-gil, Seocho-gu
Seoul , Guangdong Province
South Korea
info@astellkernservice.de

Verantwortliche Person:

Hugo Park; Dreamus Company | Astell&Kern Unit
5, Bangbae-ro 18-gil, Seocho-gu
06664 , Seoul
South Korea
info@astellkernservice.de