The Unison Research Sinfonia Stereo Tube Amplifier merges classic tube technology with modern design to deliver a warm, detailed sound. This amplifier, part of Unison Research’s classic line, combines advanced engineering and high-quality materials, offering an authentic listening experience.
Key Features
- Pure Class A Tube Amplification: Four KT88 tubes in a single-ended parallel ultra-linear configuration provide natural sound with minimal distortion.
- Dual-Mono Design: Minimizes cross-channel interference, enhancing clarity and channel separation.
- Advanced Power Supply: High-voltage stabilized power supply with large heat sinks and a non-magnetic stainless steel top plate ensures consistent performance.
- Automatic Bias Circuit: Adjusts for tube performance drift in real time, maintaining sound quality over the long term.
- Versatile Connectivity: Six gold-plated RCA inputs, speaker terminals for 4Ω and 8Ω loudspeakers, and a low-impedance output for active subwoofer connection.
About Unison Research
Unison Research, founded in Italy, has a long-standing reputation for crafting high-fidelity audio equipment that marries traditional craftsmanship with cutting-edge technology. Each product reflects their passion for music and dedication to producing equipment that delivers both sonic excellence and visual beauty.
Design
The Sinfonia amplifier is part of Unison Research’s classic line, which also includes the Preludio and Performance models. Inspired by the acclaimed Performance amplifier, the Sinfonia combines elegance with functionality. The control knobs are crafted from solid, non-magnetic stainless steel, offering a smooth, precise feel. Wooden accents not only enhance the visual appeal but also serve to dampen resonance, reducing unwanted vibrations that can interfere with sound quality.
Build
The Sinfonia is constructed with durable, high-quality materials. The chassis, made from non-magnetic stainless steel, helps keep internal components cool. The large heat sinks, essential for the high-voltage stabilized power supply, contribute to the amplifier's reliability and stability. Each component, from resistors to valve bases, has been carefully selected to ensure long-lasting performance.
Performance
The Sinfonia’s pure Class A amplification, driven by four KT88 tubes, delivers rich, warm sound with excellent linearity and minimal distortion. Its dual-mono design ensures each channel operates independently, reducing cross-channel interference and preserving sound integrity. The automatic bias circuit continuously adjusts the KT88 tubes to compensate for performance drift, ensuring consistent sound quality.
Versatility
Designed for flexibility, the Sinfonia offers six gold-plated RCA inputs for connecting multiple audio sources. The amplifier’s advanced power supply provides a stable, high-quality output. Additionally, the Sinfonia includes a low-impedance output terminal for connecting an active subwoofer, making it adaptable to various audio setups.
Compatibility
The Sinfonia's back panel is equipped with gold-plated speaker terminals compatible with 4Ω and 8Ω loudspeakers, ensuring broad compatibility. The low-impedance subwoofer output is directly linked to the pre-amplifier stage, offering reliable subwoofer performance without compromising overall sound quality.
The Home Action Party (HAP) Experience
At Home Action Party, we offer more than just high-fidelity audio equipment—we provide expert guidance, personalized service, and a dedication to helping you find the ideal sound system for your space. From delivery to custom installation, we ensure every piece of equipment you purchase performs at its best in your environment. Trust us to be your partner in the pursuit of exceptional sound.
