Description
For listeners who value both analog warmth and digital clarity, the Astell & Kern A&ultima SP3000T in Silver finish delivers a portable audio experience built around dual RAYTHEON JAN6418 MIL-SPEC vacuum tubes and the brand's Triple Amp System. Switch between dedicated tube amplification, a solid-state op-amp path, or a hybrid blend with five adjustable steps — all paired with three tube current levels for further tonal shaping. Quad AKM AK4499EX DACs and a Snapdragon 6125 processor drive a 5.5-inch Full HD touchscreen running the Crimson UI with its signature VU meter, all managed by the Teraton Alpha noise-reduction architecture. The 316L stainless steel chassis, plated in 99.9% pure silver, houses 256 GB of internal storage expandable to 1.5 TB via microSD, alongside dual-band Wi-Fi and Bluetooth 5.0 with LDAC and aptX HD. Reviewers describe the SP3000T as open, spacious, and musically engaging, with the tube circuit adding depth to older recordings. Roon Ready compatibility and six selectable DAC filters let you tailor the signal path to your headphones and source material.
This is a demonstration unit and may show light signs of handling. Please contact us for current photos and confirmation of its cosmetic condition, included accessories, packaging, and warranty coverage.
Specifications
| DAC | AKM AK4499EX ×2 with AK4191EQ ×2 digital delta-sigma modulator |
| Amplification | Triple Amp System: Tube, Op-Amp, Hybrid (5 hybrid steps) |
| Vacuum Tubes | Dual RAYTHEON JAN6418 MIL-SPEC Vintage Vacuum Tubes |
| Tube Current | 3 levels of voltage with internal plate voltage control |
| Processor | Qualcomm Snapdragon 6125 Octa-core CPU |
| RAM | 8GB DDR4 |
| Internal Storage | 256GB NAND |
| External Storage | microSD up to 1.5TB |
| Display | 5.5-inch 1920 × 1080 Full HD touchscreen |
| Analog Outputs | 3.5mm single-ended, 4.4mm balanced, 2.5mm balanced |
| Digital Output | Optical out (3.5mm) |
| Bluetooth | 5.0 — LDAC, Qualcomm aptX HD, AAC, SBC |
| Wi-Fi | Dual-band 2.4 GHz and 5 GHz |
| Battery | 5050 mAh (up to 10 hours) |
| Charging | USB-C |
| Chassis | 316L stainless steel, 99.9% pure silver plating |
| Dimensions | 142 × 85 × 18 mm (H × W × D) |
| Weight | 483 g |
| Frequency Response | ±0.005 dB (20 Hz–20 kHz) unbalanced / ±0.003 dB balanced |
| THD+N | 0.0005 % @ 1 kHz unbalanced / 0.0004 % @ 1 kHz balanced |
| DAC Resolution | PCM 8 kHz–384 kHz (8/16/24/32 bit); DSD Native DSD64–DSD512 |
| Audio Formats | WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA |
| DAC Filters | 6 selectable filters |
| DAR | Digital Audio Remaster — 44.1 kHz → 352.8 kHz; sub-96 kHz → DSD128 |
| Roon Ready | Yes |
| Amplification Architecture | Teraton Alpha (noise reduction + amplification + DAC-borne noise reduction) |