The THÖRESS SE 300B Mono Amplifier is engineered to reveal the acoustic truth through its all-tube design. With its single-ended Class-A operation, it delivers a genuine and warm sonic experience.
The SE300B Mono Amplifier employs the iconic 300B triode in single-ended operation, allowing it to achieve a maximum output power of 10 watts. This low power output is compensated by its high efficiency and the use of specially designed power coupling through a pair of EL822/CV2382 tubes operated in triode mode, which further enhances linearity and minimizes distortion. Its zero-feedback topology avoids negative feedback loops, thereby preserving the harmonic integrity of the audio signal. The carefully crafted C-core output transformer ensures optimal transfer of energy while minimizing phase distortion, contributing to its dynamic and richly textured sound. Notably, the low noise operation engineered into its design combines DC heating of the 300B triode and a custom mains transformer, ensuring minimal interference and high fidelity even at low volume levels.
Key Features
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All-Tube Mono Power Amplifier: Uses a classic 300B filamentary power triode in Class-A operation for natural harmonic reproduction.
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Single-Stage Driver: Employs two EL822/CV2382 pentodes in triode mode, providing high idle current for improved dynamic range without distortion.
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Zero-Feedback Design: Elimination of feedback loops preserves the pure signal path and enhances the acoustic authenticity.
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C-Core Output Transformer: Custom manufactured to minimize phase distortion, ensuring efficient energy transfer from the amplifier to the loudspeaker.
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Speaker Load Matching: Features precise 4, 8, and 16 ohm loudspeaker matching for optimal performance tailored to your audio configuration.
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Low Noise Operation: Design choices, including DC heating and balanced cathode adjustments, significantly reduce residual hum and idle noise.
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Custom Mains Transformer: Crafted in-house to ensure optimized operation for various voltages with minimal electromagnetic interference.
Technical Specifications
- Power Output: 10 Watts per channel
- Output Impedance: 4, 8, or 16 Ohms
- Power Tubes: 1 x 300B triode
- Driver Tubes: 2 x EL822/CV2382 in triode mode
- Operation Type: Single-Ended, Class-A
- Topology: Zero-Feedback
- Transformer Type: C-Core Output Transformer
- Dimensions: Customizable for various mains voltages: 230Vac, 100Vac, 120Vac, 220Vac, 240Vac, 245Vac
