The Unison Research Triode 25 operates on a push-pull design that harnesses the full potential of EL34 tubes to deliver exceptional audio fidelity. This amplifier exemplifies the critical relationship between engineering precision and acoustic performance.
The Triode 25 amplifier utilizes a push-pull configuration, inherently designed to optimize efficiency and linearity by employing a final stage that amplifies both the positive and negative halves of the audio signal. This dual-mode operation leverages ultralinear technology, allowing for improved power output and reduced distortion levels across the audio spectrum. The output transformer is a key component, designed symmetrically to maintain linear signal reproduction while also addressing concerns of odd-order harmonic distortion common in traditional amplifier designs. The configuration enables a higher output power of approximately 45 watts per channel in pentode mode and approximately 25 watts per channel in triode mode, ensuring efficient energy management with lower thermal output. Additionally, the carefully designed amplification stages and negative feedback mechanism work to further reduce distortion, which enhances overall sound quality, extending the amplifier's performance within the operational limits of the EL34 valves.
Key Features
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Push-pull Configuration: Provides higher output power and efficiency, leading to less heat generation and prolonged tube life.
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Ultralinear Operation: Achieves a more linear response in the audio band, minimizing harmonic distortion and enhancing sound clarity.
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Dual Operation Modes: Triode mode for rich and warm sound, and pentode mode for higher power and efficiency.
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High-Quality Output Transformer: Designed for symmetrical performance, crucial for accurate audio signal reproduction.
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Negative Feedback: Reduces distortion and improves overall sound fidelity, ensuring a more accurate auditory experience.
Technical Specifications
- Output Stage: Push-pull, ultralinear, Class-AB
- Output Power: Approx. 45 watts per channel (Pentode), Approx. 25 watts per channel (Triode)
- Output Impedance: 6 Ohm
- Input Impedance: 47 kOhm / 50 pF
- Negative Feedback: 5 dB or 1.8 dB
- Valve Complement: 2 x ECC83 (12AX7), 1 x ECC82 (12AU7), 4 x EL34 (6CA7)
- Power Consumption: 300 watt max
- Fuses: T6.3A from 100V to 130V, T3.15A from 220V to 250V
- Dimensions: 30 cm x 45 cm x H. 20 cm
- Net Weight: 20 Kg
