Astell&Kern A&ultima SP4000T Vacuum Tube High Resolution Portable Music Player

ETA July

Features:

• 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

• 2nd Generation Anti-Microphonic Noise Architecture

• High Driving Mode, ESA, and Advanced DAR for superior sound quality (Same DNA from SP4000)

• Full Open Android(15)

• Enhanced Octa-Core CPU

Differences between SP3000T & SP4000T:

• Unlike the SP3000T, this model is equipped with four RAYTHEON JAN6418 tubes, further enhancing its analog sound characteristics.

• By applying the Triple AMP System, it perfectly harmonizes the true analog sound of Quad vacuum tubes with the dynamic sound of an OPAMP in a single device. It features three amp modes: OPAMP / TUBE AMP / HYBRID AMP.

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.

Specifications:

• Model: SP4000T (PPF52)

• Body Color: Silver, Copper

• Body Material: Stainless Steel, Copper

• Display: 6inch 2K (2160 x 1080) touch screen

• Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF

• 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), Stereo / DSD512(1bit 22.4MHz), Stereo

• Output Level: Unbalanced 4.2Vrms │ Balanced 8Vrms (Condition No Load)

• CPU: OCTA-Core

• DAC: AKM4191EQ x2 + AKM4499EX x2

• Vacuum Tube: RAYTHEON JAN6418 x4 (Quad Tube)

• 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 (4.4m, only 5-pole supported)

• Wi-Fi: 802.11 a/b/g/n/ac/ax (2.4/5GHz)

• Bluetooth: V5.2 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC, LHDC, SBC, AAC)

• Dimensions: 3.37” (85.7mm)[W] x 5.9” (150mm)[H] x 0.76” (19.5mm)[D]

• Weight: About 19.9oz (565g)

• Feature Enhancements: Firmware upgrade supported (OTA)

• Operating Temperature: 0℃ ~ + 40℃ (32℉~ 104℉)

Audio Specifications:

• 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

• S/N: 124dB @ 1kHz, Unbalanced │ 125dB @ 1kHz, Balanced

• Crosstalk: -136dB @ 1kHz, Unbalanced │ -145dB @ 1kHz, Balanced

• THD+N: 0.0006% @ 1kHz, Unbalanced │ 0.0004% @ 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)

Clock Source:

• Clock Jitter: 25pS (Typ)

• Reference Clock Jitter: 200 Femto Seconds

Storage Capacity:

• Built-in Memory: 256GB [NAND]

• External Memory: microSD x1 (Max. 1.5TB)

Supported OS:

• Windows 10,11(32/64bit) MAC OS X 10.7