Thöress Integrated Full-Function Preamplifier Description (PDF) Download Manual Picture Gallery

The Dual Function Amplifier (DFAmp) represents...

an ultimate implementation of a line control amplifier
and a headphone amplifier, both of which functions are
performed by the same minimalist vacuum tube circuit
with very low output impedance. Such providing the
amplifier with an outstanding ability to simultaneously
drive long cable runs and headphones with an
impedance as low as 50 ohms or even lower.

The DFAmp also features unique tone control facilities
and a custom designed remote volume control presented
with typical THÖRESS style and attention to detail.
The circuit of the amplifier consists of a triode gain stage
followed by a unity-gain current buffer
employing a power pentode
operated in triode mode
with high idle current.




A Tribute to Professional Audio Components
from the Golden Age of the Vacuum Tube !