EHT Mono Power Amplifier
Best hybrid amplifier for audiophiles seeking pure, natural sound quality.
Experience unparalleled audio fidelity with the THÖRESS EHT Mono Power Amplifier. This amplifier employs a unique, minimalist, single-ended, zero-feedback vacuum tube MOSFET hybrid topology, delivering up to 50 watts into 4 ohms. Its design ensures excellent loudspeaker drive capability without relying on costly power tubes. Meticulously hand-constructed with point-to-point wiring, it offers low noise and high reliability. Enjoy user-friendly features like on-the-fly gain adjustment and subtle bass boost options, all housed in a nonmagnetic aluminum chassis for superior thermal stability.
$14109.00
Owner Satisfaction
4.8
/ 5
Category Rank
277
/ 2553
#277 in Power Amplifiers
Price vs Category Average
+71%
Above average
Output Power
308406504
/ W ( ohm), W ( ohm), W ( ohm)
Who it's for
- Audiophiles seeking transparent and natural musical reproduction
- Collectors valuing artisanal craftsmanship and long-term reliability
- Listeners desiring a distinct and linear sonic signature
Who should skip it
- Owners of low-sensitivity speakers needing significant power
- Users preferring easily accessible and affordable replacement tubes
- Budget-conscious buyers looking for high-value audio equipment
Performance breakdown
Sonic Transparency
Zero-feedback topology preserves the natural texture and nuance of every recording.
Build Integrity
Meticulous point-to-point wiring ensures long-term reliability and signal path purity.
Loudspeaker Versatility
Robust MOSFET output stage drives a wide range of speaker impedances effortlessly.
System Integration
Six-position gain adjustment allows for perfect matching with diverse preamplifier setups.
Thermal Stability
Nonmagnetic aluminum chassis effectively manages heat for consistent, long-term performance.
User Customization
Subtle bass boost options provide useful flexibility for room-specific acoustic tuning.
Key Specs
Output Power
30W (8 ohm), 40W (6 ohm), 50W (4 ohm)
Topology
Vacuum Tube MOSFET Hybrid Power Amplifier
Tubes used
6J5GT or 7A4, 1x12HG7
Gain Selector
6 positions (4dB to 25dB)
Construction
Full hand construction, point-to-point wiring
Chassis
Nonmagnetic aluminum casework
Dimensions
434x454x184 mm
Weight
15Kg
Features
- Unique Zero-Feedback EHT Topology
- Single-Ended Hybrid Triode design
- Class-A MOSFET output stage
- Selectable gain settings
- Subtle bass boost options
- Proprietary low-noise C-Core transformer
- No sound-degrading protection circuitry
- Excellent loudspeaker matching
What customers say
Owners hold the THÖRESS EHT Mono Power Amplifier in high regard, praising its profoundly musical and emotionally engaging performance. The core theme is the successful marriage of classic single ended triode purity, featuring lush midrange and natural timbre, with unexpected dynamic authority. Reviewers consistently note the holographic soundstaging and the amplifier's ability to reveal subtle textures without fatigue. Build quality is universally lauded, reflecting a hand crafted, lifetime investment. While positioned in the ultra high end, the consensus is that the sonic performance justifies the cost, offering a significant leap over comparable gear. It is viewed as a destination component for serious audiophiles.
Know before you buy
The EHT topology combines the harmonic richness and musicality of vacuum tubes with the power, control, and efficiency of a Class-A MOSFET output stage. This allows the amplifier to drive demanding loudspeakers with authority while maintaining the natural, fluid sound signature associated with high-end tube gear.
The amplifier features a six-position gain selector ranging from 4dB to 25dB. This allows you to precisely match the amplifier's sensitivity to your preamplifier and loudspeaker efficiency, ensuring an optimal signal-to-noise ratio and ideal volume control range.
THÖRESS prioritizes signal purity by omitting sound-degrading protection circuits. While this design choice ensures the highest possible audio fidelity, it requires the user to be mindful of proper startup and shutdown procedures to protect sensitive loudspeaker components.
The amplifier includes subtle, integrated bass boost options designed to help compensate for room acoustics or to provide a fuller sound profile with smaller monitor speakers. These adjustments are implemented to enhance low-end presence without compromising the overall transparency of the midrange.
With an output of 50 watts into 4 ohms, this amplifier is capable of driving a wide variety of loudspeakers. However, its performance is best suited for systems where the amplifier's refined Class-A character can shine, rather than systems requiring massive power reserves for extremely inefficient, low-impedance loads.
Point-to-point wiring eliminates the need for printed circuit boards, which can introduce parasitic capacitance and signal interference. This traditional, labor-intensive construction method ensures a shorter, cleaner signal path and makes the unit significantly easier to service or maintain over its long lifespan.
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