Thöress F2A11 Integrated Single-Ended Triode Power Amplifier Picture Gallery Download Manual

Our Integrated Amplifier offers the music lover...

the possibility to build a purist setup consisting solely
of a CD player, the amplifier, and a pair of
(preferably highly efficient) loudspeakers such as the
THÖRESS FR20CD-MKIII. Of course, the amplifier may
also be combined with a preamplifier, such as the
THÖRESS full-function preamplifier, or a standalone
phono stage, in which case a high-gain
unit is strongly advised.

The amplifier employs NOS Siemens F2A11 beam
power tetrodes
, made famous by the Klangfilm
cinema amplifiers of post-war Germany. It is entirely
hand-built and hard-wired, whereby every detail
of the internal construction has been
carefully considered for reliability
and ease of service.



The amplifier provides three inputs for line-level
program sources, selected by means of a rotary
switch located on the rear panel of the amplifier.
The volume of each channel is adjusted separately
from the top of the amplifier via carefully matched
high-grade rotary potentiometers.

Although reasonably priced, this amplifier shares
the non-compromise approach of the larger
THÖRESS mono power amplifiers. The mains
transformer and output transformers are wound
in-house to ensure the highest quality and reliability.
The output transformers feature tape-wound cut
cores (C-cores) and allow for precise matching
of a 4, 8 or 16 ohm load to the power tube by way
of jumpers soldered to the secondary terminals.
The mains transformer is mounted to the amplifier
case by means of rubber dampers to prevent residual
vibration of the power transformer from entering
sensitive parts of the amplifier.

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  1. Separate volume control
    for left an right channel.
  2. Reliable output transformers
    with tape-wound cut cores.
  3. Precise 4, 8 or 16 Ohm
    loudspeaker load matching.

The sound of the THÖRESS F2A11 amplifier
is powerful, warm, clear and natural, and will easily
measure up to the expectations of even the most
critical and experienced music enthusiast.
It is truly unique in its class and can
be outperformed only by the larger
THÖRESS monoblock amplifiers.



  1. Entirely hard-wired.
  2. 230 Vac or 120 Vas mains
    via transformer jumper.
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