THÖRESS F2a11 - Single-Ended Triode Integreret forstærker

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P R O D U C T  D E S C R I P T I O N

The F2a11 Integrated Amplifier utilizes the famous F2a11 vacuum tube in singleended triode operation mode for an output power of 2x6 watts. The F2a11 is a power pentode of matchless built quality exclusively manufactured by SIEMENS in the 1950s and early 1960s which has been specifically designed for the most demanding industrial applications. When operated in triode
mode this extraordinary tube offers excellent sonics on par with the finest classic
filamentary triodes such as 300B, 2A3, AD1 or PX25. A 12SN7GT double-triode is
employed in the driver stages. The triode sections of the 12SN7GT tube are
equivalent to a 6J5GT single-triode, a highly regarded classic medium-gain octal base
triode with fairly low transconductance from the early times of tube electronics,
unarguably one of the most linear amplification devices ever developed in the
history of electronic technology.
The amplifier can be employed as a stereophonic power amplifier, in which case the volume controls of the amplifier serve as input attenuators to match the gain of the line device to the efficiency of the loudspeaker.
Our All-Tube Integrated entirely relies on minimalist single-ended zero-feedback
schematics. Deliberately ignoring the fact that many music lovers persistently believe
in the myth that balanced technology is generally superior to single-ended concepts. 

The amplifier is built with meticulous hand construction using our proven point-topoint wiring techniques, whereas much care has been taken in arranging each aspect
of the internal construction to ensure low noise performance, ease of service and
the highest reliability for many years to come. Although reasonably priced, the
F2a11 Integrated shares the non-compromise approach with our larger mono
amplifier models. It is by no means an entry-level component, but a state-of-the art
device which is likely to be sonically superior to any competitive product regardless
of price. The sound of our F2a11 amplifier is powerful, warm, clear and natural.
Particularly when combined with our highly efficient 2CD12 highly efficient
loudspeaker the sonic presentation is of utmost refinement and will easily meet the
expectations of even the most critical and experienced music lover.

All-Tube Integrated Amplifier with 2x6 watts of output power utilizing
Siemens F2a11 Power Pentode in single-ended triode mode and a highly linear
12SN7GT double-triode in the driver stages.
Minimalist zero-feedback schematic.
3 line level inputs (2x3 RCA)
High-grade continuously variable potentiometers for separate (manual) volume
control of the channels.
Ultimate C-Core output transformers. Precise 4, 8, and 16 ohm loudspeaker load matching 
High-grade electrolytic capacitors (made in Germany) in the power supply.
Ultra low noise mains transformer made in-house for 230Vac 
Full hand construction, point-to-point wiring throughout.
Nonmagnetic aluminum casework

Dimensions: 150x595xH330 mm

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