Unison Research - Preludio - Integrated Tube Amplifier

The Unison Research Preludio is a beautifully crafted, pure Class A tube amplifier that delivers the unmistakable warmth, texture, and musicality only valves can provide. Built in Italy and part of Unison Research’s acclaimed “Classic Line,” the Preludio combines timeless design with refined engineering to create an amplifier that’s as engaging to listen to as it is to look at.

Using a single-ended ultralinear Class A topology, the Preludio produces 14 watts per channel of highly expressive power—perfect for pairing with efficient speakers in smaller to mid-sized rooms. The result is a rich, holographic soundstage with exceptional midrange presence, smooth treble, and a natural, emotionally engaging presentation that draws you deeper into your music.

Finished with a signature combination of real wood and brushed metal, the Preludio is unmistakably Italian—blending craftsmanship, character, and performance into a single piece of audio art.

Why Choose the Preludio?

Pure Class A Tube Sound:
Single-ended ultralinear design delivers warmth, detail, and musical realism.

Effortless Musicality:
A sweet, expressive midrange and refined treble create an immersive listening experience.

Built to Last:
Premium materials and thoughtful engineering ensure long-term reliability and performance.

Perfect for High-Efficiency Speakers:
14W per channel is ideal for sensitive speakers (≈90dB+), making it perfect for curated, high-end systems.

Timeless Italian Design:
Real wood finishes and elegant industrial styling make it a centerpiece in any listening room.

Key Features

• Single-ended ultralinear Class A tube amplifier
• 14W per channel output
• 6550 / KT88 output tubes with ECC82 drivers
• 4 line-level inputs + tape input
• Subwoofer output for system flexibility
• Remote control for volume
• Handmade in Italy with premium materials