ThivanLabs Ultimate 300: Flagship Tube Preamplifier for True Audiophiles

ThivanLabs has officially introduced its new flagship tube preamplifier, the Ultimate 300—a meticulously engineered piece of audio craftsmanship designed around the legendary directly heated 300B vacuum triodes. Revered by tube enthusiasts for their rich, natural sound, the 300B tubes serve as the heart of this high-performance Class A, single-ended design.

Built for uncompromising musicality, the Ultimate 300 features ThivanLabs’ proprietary transformer-coupled output stage, specially optimized for the 300B’s unique sonic character. Operating with zero negative feedback, this topology promises breathtaking detail, dynamic expression, and an analog warmth that only true tube aficionados can fully appreciate.

ThivanLabs Ultimate 300

A major highlight of the Ultimate 300 is its integrated, full-featured phono stage, compatible with MM, MC, and even optical cartridges from DS Audio. This makes it an incredibly versatile centerpiece for analog setups, appealing to both purist vinyl collectors and adventurous audiophiles looking to explore cutting-edge cartridge technology.

Tube rolling is fully supported—and encouraged. With Auto Bias functionality, users can safely mix and match different 300B and 6SN7 tubes to fine-tune their system’s sonic signature. ThivanLabs recommends using matched pairs to ensure optimal balance and tonal accuracy.

ThivanLabs Ultimate 300

Audiophile-Grade Power Supply in a Separate Chassis

The Ultimate 300’s power supply is housed in a dedicated external enclosure, built with extreme attention to noise control and current stability. It incorporates multiple custom-designed chokes—painstakingly tested for superior filtering performance—offering a clean, dynamic power source that retains every nuance of the audio signal. Compared to traditional capacitor-based designs, this multi-choke approach significantly enhances low-noise performance and musical resolution.

ThivanLabs Ultimate 300

Inputs, Outputs & Build Quality

The rear panel offers a solid array of connectivity options:

• 1 Balanced (XLR) input

• 3 Unbalanced (RCA) line inputs

• Dedicated phono inputs for MM, MC, and DS Audio cartridges

• Balanced (XLR) and unbalanced (RCA) outputs for flexibility in system integration

With a frequency response stretching from 6 Hz to 50 kHz (+/- 3 dB), the Ultimate 300 ensures both authority and airiness across the full audio spectrum.

Build & Finish

Crafted with the kind of precision and aesthetic flair expected at this level, the Ultimate 300 is offered in two classic finishes: silver and black. The amplifier weighs 24 kg, while the separate power supply tips the scale at 18 kg. Both chassis measure 45 cm wide by 40 cm deep; the amplifier stands 29 cm tall, and the power unit is 15 cm high.

The ThivanLabs Ultimate 300 isn’t just another high-end preamp—it’s a celebration of tube tradition, modern engineering, and musical intimacy. Whether you’re a vinyl devotee or a curious tube roller, this preamplifier invites you to rediscover your music, one glowing triode at a time.