The Unison Research Unico 90 Hybrid Integrated Amplifier delivers precise sound reproduction by balancing valve warmth with solid-state efficiency. Its unique circuit design minimizes distortion, ultimately revealing the 'Acoustic Truth' of your music.
The Unico 90 employs a hybrid structure where the gain and character are defined by a tube stage utilizing ECC83 and ECC81 triodes, arranged in a multiple-parallel-totempole configuration. This innovative design allows for limited gain while achieving a low output impedance, ensuring optimal linearity and driving capabilities. The triodes selected are known for their excellent mutual compensation that counteracts nonlinearity, thereby producing a signal that is characterized by remarkable linearity, minimal distortion, and a stable frequency response. With a carefully designed feedback factor of 16 dB, the amplifier achieves high performance across various audio levels, fundamentally diverging from traditional amplification methods, which often rely on excessive global feedback. The direct coupling between stages enhances consistency and performance at varying power levels, allowing for a coherent and natural listening experience that remains true to the source material.
Key Features
- Hybrid Amplification: Combines the warmth of vacuum tubes with the efficiency of solid-state technology, providing detailed sound without the drawbacks of traditional amplification methods.
- Zero Global Feedback: By utilizing a design that eliminates global feedback, distortion is minimized, allowing for a more authentic audio reproduction across the frequency spectrum.
- Triode Configuration: The use of ECC83 and ECC81 triodes helps achieve linearity and low output impedance, enhancing dynamic response and overall musicality.
- Multiple-Parallel-Totempole Circuit: This arrangement maximizes each triode's performance, resulting in a smoother and more consistent audio signal, particularly beneficial in handling complex musical passages.
- Direct Coupling: Ensures strong synchronization between circuit stages, allowing for greater consistency in power delivery and audio fidelity, especially at higher volumes.
Technical Specifications
- Power Output: 90 W per channel
- Input Impedance: 47 kΩ
- Total Harmonic Distortion: <0.1%
- Frequency Response: 10 Hz - 50 kHz
- Damping Factor: 100
- Weight: 16 kg
- Dimensions: 430 x 370 x 100 mm
- Input Configuration: 4 line inputs
- Output: Speaker binding posts for 4 and 8 ohm systems
