The THÖRESS DFAmp redefines acoustic truth by merging line control and headphone amplification in a minimalist, vacuum tube-based design. Its low output impedance ensures optimal performance across a wide range of load conditions.The THÖRESS DFAmp operates on a single-ended zero-feedback topology, which emphasizes natural sound reproduction by avoiding the complexities and distortions often introduced by feedback mechanisms. Utilizing a 12J5GT triode for gain followed by a 12GN7 power pentode in triode mode, this amplifier achieves high linearity and low noise through its point-to-point wiring technique. The unique design allows for both long cable runs and low-impedance headphones to be driven without loss of signal integrity, showcasing the physics of efficient energy transfer and electromagnetic compatibility. The timbre registers utilize minimal capacitance changes to carefully manipulate frequency response without conventional tone control circuitry, thus preserving the purity of the original sound while accommodating various listening conditions.Key Features Single-Ended Zero-Feedback Design: Minimizes distortion and enhances sound linearity by maintaining a direct signal path without feedback loops. 12J5GT and 12GN7 Tubes: Combines a medium-gain triode with a high-gain pentode to achieve high transconductance and low noise, suitable for high-fidelity applications. Timbre Registers: Employs simple capacitor interpositions to adjust frequency response without degradation, allowing for tailored audio characteristics while keeping the signal path clear. Low Output Impedance: Ensures compatibility with both long cable lengths and low-impedance headphones, optimizing dynamic range and preventing signal loss. Motor-Driven Volume Control: Offers precision volume adjustments with an ALPS dual-potentiometer, ensuring smooth transitions and high control fidelity. Technical Specifications SRP: $14999 Tube Configuration: 12J5GT triode (gain stage), 12GN7 pentode (buffer) Output Impedance: Very Low Gain Options: (-)6dB to full gain Timbre Registers: 4 on-the-fly presets Rotation Selector Positions: 6 Voltage Supply: Standard ± supply voltages for tube operation Construction: Hand-made point-to-point wiring Remote Control: Yes, motor-driven
