ASTELL&KERN

A ultima SP4000

A ultima SP4000

The A&ultima SP4000 is designed for audiophiles who demand nothing less than perfection in their portable audio experience.

Combining cutting-edge technology, exquisite craftsmanship, and a stunning design, it represents the pinnacle of portable audio players.

The SP4000 features an advanced Octa-Audio circuit, combining a single AK4191 digital processor with an AK4499EX DAC, achieving a true Quad DAC setup.

This innovative design minimizes noise and enhances signal separation for superior sound quality. Unlike the SP3000’s dual DAC configuration, this 1:1 ratio ensures cleaner, more precise processing, separating digital and analog signals for unprecedented clarity.Equipped with two parallel OPAMPs, the SP4000 expands its dynamic range, delivering detailed, rich audio without increasing noise.

High Driving Mode allows powerful, stable output, offering precision in even the most subtle sonic details, for a more immersive listening experience.

The proprietary ESA technology in the SP4000 aligns frequency signals to minimize group delay—enhancing clarity, imaging, and timing.

This technology ensures that frequencies reach their destination uniformly, eliminating distortion and refining sound purity.The SP4000 integrates an ultra-low noise LDO (Low Dropout) Regulator, reducing noise by up to 97% compared to previous models. This cutting-edge component ensures a cleaner sound, ideal for audiophiles seeking pure audio reproduction.

For the first time in Astell&Kern’s lineup, the SP4000 offers full Android OS support, including Google Play Store access for app installation.

With Astell&Kern’s ADP (Direct Path) technology, it overcomes Android’s sampling limitations, enabling bit-perfect, lossless playback even with streaming services.

The SP4000 introduces Astell&Kern's second-generation DAR technology, enhancing sound naturalness and precision.

The two-stage process, combining VSE and DAR, restores lost harmonics and upscales audio to deliver a more immersive, accurate soundstage.

Utilizing Any Layer HDI (High-Density Interconnect) PCB technology, the SP4000 ensures minimal signal loss within a compact design, providing an enriched, detailed sound profile.The SP4000’s 99.9% pure copper

Shield Can blocks noise and electromagnetic interference, offering unmatched clarity.

This precision-engineered shield improves the signalintegrity for a cleaner, more defined audio experience.

A visually engaging, modern UI accompanies the SP4000, offering an immersive and tactile music selection experience. The Crimson Theme balances simplicity with emotional sensibility, designed to minimize eye fatigue and optimize battery life with an elegant black and red color scheme.