The original vacuum tube is known for its warm sound, attributed to its distinctive rich harmonics, which have cemented its status as a cherished component of Hi-Fi audio. However, its impracticality in terms of miniaturization, primarily due to power control and footprint issues, presented a formidable obstacle, rendering it unsuitable for use in portable audio players.
In Astell&Kern's unyielding quest for innovation, we refused to settle for conventional sound and design, and instead worked to bridge the gap between stationary and portable audio by infusing the essence of analog sound into our devices.
These efforts eventually culminated in the pairing of the SP3000T with the RAYTHEON JAN6418 Miniature vacuum Tube. The RAYTHEON JAN6418 is a mini vacuum tube popular among audiophiles. Designed to meet military specifications and traditionally used in military communication equipment, it quickly garnered recognition for its distinctively warm and soft sound, leading to its integration into regular audio devices.

Harnessing the power of Astell&Kern's unique TERATON ALPHA technology, the A&ultima SP3000T achieves seamless harmony between the rich, authentic analog sound of a real tube and the dynamic clarity of an OP AMP.
The SP3000T offers three distinct modes to cater to your audio preferences: TUBE AMP Mode, which delivers the natural warmth of a vacuum tube amplifier;
OP AMP Mode, which is renowned for Astell&Kern's crystal-clear resolution and expansive soundstage;
and Hybrid AMP Mode, which expertly blends the richness of analog with high-resolution clarity.

Nothing compares to the warm texture and distinctive sense of space delivered by a Tube Amp — qualities that remain unmatched by even the most advanced digital amplifiers. Renowned for their ability to convey the raw emotion of music, the timeless appeal of vacuum tube amplifiers has captivated audiophiles since their inception.

The SP3000T's TUBE AMP Mode allows you to enjoy the smooth and inviting analog sound unique to real vacuum tube technology, complemented by groundbreakingly low noise levels.

After testing the operational range of the vacuum tube, we developed an internal plate voltage control system, which can be adjusted in three stages and directly affects the amplification rate of the vacuum tube amplifier, resulting in nuanced changes in sound texture.
Experience the subtle shifts in density and spatial presence in your headphones or earphones as you fine-tune the current of the vacuum tube amplifier.

While crafting the SP3000T, we spent a long time searching for a material that seamlessly blends high-resolution digital sound with the rich analog warmth of a vacuum tube. After rigorous research, Astell&Kern proudly emerged as a pioneer in selecting and applying material featuring 99.9% pure silver plating.

Silver boasts superior electrical conductivity compared to copper and gold, making it a popular choice for premium semiconductors and high-end audio components.
The body of the SP3000T is coated in 99.9% pure silver plating atop 316L stainless steel, which is renowned for its exceptional corrosion resistance.
Since silver can tarnish over time due to exposure to air, we've taken extra steps to increase its longevity, such as adding a special multi-layer coating to prevent sulfurization, to enhance durability and prevent exposure with air.

The SP3000T comes with a deluxe case crafted from shrunken calf leather sourced from Perlinger in Germany and Alcantara in Italy, ensuring a level of style and quality that matches the quality of the device. The shrunken method used to craft the leather results in natural wrinkles, creating an irregular, yet distinctive texture that enhances its luxurious appearance. Unlike regular embossing techniques, this process preserves the leather's natural texture and minimizes discoloration, ensuring the color remains vibrant even after prolonged use.


The case of the SP3000T is fashioned from exquisite leather crafted by the Perlinger tannery in Germany.
With a heritage spanning five generations since its inception in 1864, Perlinger stands as the last bastion of calf leather manufacturing in Germany.
Renowned for its unparalleled quality, Perlinger's shrunken calf is regarded as the finest in the industry, making it highly sought after by prestigious luxury brands such as H.