Reimagine Analog Sound

SP4000T

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Reimagine Analog Sound, A&ultima SP4000T

A&ultima SP4000T is the culmination of nearly two years of dedication and exploration, beginning from the planning and development stages of SP3000T.

DAC, Tube, and AMP — the essential elements of high-end audio — may be accessible to anyone. Yet even with the same elements, what is ultimately created from them is an entirely different matter. Using the canvas of SP4000, the essence of digital sound, Astell&Kern held onto one defining question over the past two years:
“How can we bring deeper emotion through analog sound?”

The answer was drawn with sincerity and endless passion, stroke by stroke. Every trace of that journey is distilled into SP4000T. Astell&Kern’s own analog sound — comfortable to listen to, yet revealing new depth and character the longer you experience it.
Discover it for yourself with A&ultima SP4000T.

  • Industry-first DAP with MIL-Spec Vintage Vacuum Tube Raytheon JAN6418 in Quad Configuration
  • Industry-first DAP with Triple Tube Mode (Triode, Ultra Linear, Pentode)
  • T Series Signature feature: Triple AMP System
  • Adjustable Tube Current with Three Levels
  • High Driving Mode, ESA, and Advanced DAR for superior sound quality
  • Full Open Android
  • Enhanced Octa-Core CPU

AK4191EQ x2 + AK4499EX x2

Octa-Core

Quad Tube

Triple AMP

Triple Tube

Tube Current

Full AOS