THÖRESS DFAmp Dual Function Amplifier
Best vacuum tube amplifier for audiophiles seeking versatile headphone and system control.
The THÖRESS DFAmp is a refined Dual Function Amplifier, expertly combining a line control amplifier and a high-fidelity headphone driver using the same minimalist, single-ended zero-feedback vacuum tube circuit. It is engineered for exceptional linearity, capable of driving long cable runs and low-impedance headphones down to 50 ohms. This unit features unique on-the-fly timbre registers for subtle tonal adjustments and includes a custom remote volume control. Construction is meticulous, utilizing point-to-point wiring and a proprietary, in-house manufactured mains transformer for ultra-low noise performance.
$13495.00
Owner Satisfaction
4.8
/ 5
Category Rank
277
/ 2553
#277 in Power Amplifiers
Price vs Category Average
+63%
Above average
Circuit
Single-ended zero-feedback
/ Single-ended zero-feedback
Who it's for
- System builders needing versatile integrated and preamplifier functionality
- Audiophiles seeking natural, transparent, and highly musical sound reproduction
- Collectors valuing meticulous German craftsmanship and long-term component reliability
Who should skip it
- Budget-conscious buyers seeking high-value audio equipment
- Owners of low-sensitivity speakers requiring high-wattage power amplification
- Listeners preferring low-maintenance, solid-state audio solutions
Performance breakdown
Circuit Purity
Zero-feedback design delivers an exceptionally transparent and natural sonic signature.
Headphone Versatility
Handles low-impedance loads with ease while maintaining impressive tonal authority.
Build Integrity
Point-to-point wiring and proprietary transformers reflect uncompromising artisanal manufacturing standards.
Timbre Customization
On-the-fly tone registers offer meaningful adjustments without compromising signal integrity.
System Integration
Triple RCA outputs provide seamless connectivity for complex multi-component audio setups.
Noise Floor
In-house transformer engineering ensures a silent background for delicate musical passages.
Key Specs
Circuit
Single-ended zero-feedback
Tubes Used
12J5GT/6J5GT gain stage + 12GN7 buffer
Weight
11.7Kg
Dimensions
434x434x154mm
Input Types
6x RCA line level inputs
Output Types
Triple RCA master output; 2x 6.35mm headphone jacks
Line Gain Settings
High (26/20dB), Medium (18/12dB), Low (10/4dB)
Chassis Material
Nonmagnetic aluminum casework
Features
- Dual function: Line control and headphone driving
- Minimalist single-ended zero-feedback circuit
- On-the-fly tone control presets (GT Selector)
- Remote volume control via motor-driven potentiometer
- Triple RCA outputs for simultaneous system connection
- Two toggle-selectable front headphone outputs
- Proprietary, in-house built low-noise transformer
- Meticulous point-to-point wiring throughout
What customers say
The THÖRESS DFAmp earns high praise for its exceptional sonic performance, consistently delivering natural timbre and remarkable transparency. Users appreciate its organic sound reproduction and its authority in driving both demanding headphones and loudspeakers, highlighting its valuable dual functionality. Build quality is universally lauded, reflecting meticulous German engineering and robust construction. A key feature is the impressively low noise floor, allowing subtle musical details to surface clearly, even for a tube design. While positioned for serious audiophiles due to its premium cost, the consensus is that the DFAmp justifies its price through superior musical engagement and technical precision, making it a worthwhile investment in top tier fidelity.
Know before you buy
Yes, the DFAmp is designed as a dual-function unit. You can connect your power amplifier to the RCA outputs while using the front-panel jacks for your headphones, allowing for seamless switching between your speaker system and personal listening.
The GT Selector provides on-the-fly tonal adjustments without the phase distortion typically associated with traditional active tone controls. It allows you to subtly tailor the frequency response to better match your specific headphones or room acoustics.
The DFAmp is engineered to handle low-impedance headphones down to 50 ohms. Its zero-feedback vacuum tube circuit provides enough current and linearity to maintain high-fidelity performance with most standard high-quality headphones.
Point-to-point wiring eliminates the need for printed circuit boards, which can be prone to trace degradation over time. This traditional construction method makes the unit more robust and significantly easier to service or repair throughout its lifespan.
The selectable gain settings allow you to optimize the signal-to-noise ratio and volume control range based on the sensitivity of your power amplifier and the output level of your source components. This ensures you can achieve ideal volume levels without excessive background noise or limited adjustment range.
No, the remote control operates a high-quality motor-driven potentiometer. This maintains a purely analog signal path, ensuring that the remote functionality does not introduce digital artifacts or degrade the signal quality.
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