The THÖRESS EHT Hybrid Triode Mono Amplifier produces robust output power with a unique hybrid topology. This design merges the best characteristics of both vacuum tube and solid-state technologies, delivering acoustic fidelity with unparalleled drive capability.
The THÖRESS EHT Mono Amplifier utilizes a unique SINGLE-ENDED ZERO-FEEDBACK topology, known as EHT Topology, which combines a triode gain stage with a MOSFET unity gain output stage, both operated in class-A mode. The design emphasizes low output impedance and thermal stability, enabling the amplifier to drive loudspeakers with challenging impedance and efficiency characteristics effectively. By eliminating the need for iron-cored output transformers, the EHT topology reduces the voltage swing required from the driver, lowering non-linear distortion. The amplifier’s architecture allows for 30, 40, or 50 watts of output power across varying load impedances, making it adaptable to a range of speaker configurations. Moreover, meticulous hand construction and point-to-point wiring techniques enhance reliability and minimize noise, ensuring high fidelity playback that meets the demands of discerning listeners.
Key Features
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Hybrid Topology: The use of SINGLE-ENDED TRIODE combined with a MOSFET output stage provides high idle current and class-A operation, maximizing signal fidelity.
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Low Output Impedance: This design offers a high damping factor, facilitating optimal control over loudspeakers and improving transient response.
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Minimalist Design: The absence of feedback in the amplifier’s circuit minimizes distortion and preserves the purity of the audio signal.
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Gain Adjustment: The 6-position rotary switch allows for fine-tuning the amplifier's gain, providing flexibility to tailor the output for different listening environments.
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Thermal Stability: The absence of sound degrading protective circuitry contributes to consistent performance and durability under operational conditions.
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On-the-fly Bass Boost: The bass response is enhanced in higher gain settings, tailored for an enriched listening experience without compromising quality.
Technical Specifications
- Output Power: 30W into 8Ω, 40W into 6Ω, 50W into 4Ω
- Gain Adjustment: 10dB in positions 5 and 6 of the gain selector
- Topology: Single-ended zero-feedback vacuum tube MOSFET hybrid
- Output Impedance: Low output resistance enabling high damping factor
- Construction: Hand-built with point-to-point wiring
- Cooling: Operates with impeccable thermal stability
- Signal Class: Class-A operation
