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LA 5TX
Pure Valve Line Pre-amplifier User Manual
About the LA 5TX
The LA5TX is a very special pre-amplifier. Despite
looking like a valve pre-amplifier, it is in fact designed
around two very high quality transformers which have
a sim
ple low gain valve stage to act as a “buffer”.
This way the impedance of the source unit and the
input of the power amplifier are completely
separated.
The
Transformers
incorporate
our
uniquely wound
Low Distortion Tertiary
winding,
complex and time consuming to get right, but
preserving the smallest musical detail and dynamics
without the problems associated with capacitor
coupling.
To get the best out of the LA5TX. Please read the
enclosed notes. We have tried to give you all the
information you need.
We would recommend that
everyone follows the ‘quick set up guide’.
Should
you be uncertain about anything to do with your
LA5TX please contact your dealer.
The LA5TX is a line amplifier designed to
complement high quality valve or transistor power
amplifiers requiring an input voltage of 1volt or
greater. It will also work well with most integrated
amplifiers.
Our philosophy is to use traditional valve minimalist,
circuitry. The beauty of valve amplifiers is that they
are usually very simple; therefore with the use of
traditional point-to point construction, modern high
performance low tolerance components, it is possible
to achieve very high sonic performance. This
simplicity enables us to avoid the use of printed
circuit boards, which are not ideal for valve amplifiers
despite their common use.
Although technical performance is important, we
never forget that sound quality takes overriding
priority in our design and production. The LA5TX has
a massive overload capability and even then would
go into ‘soft clipping’, which is much more benign and
easier on the ear than overloaded transistors.
The simplicity of the circuit means that there are
much fewer components for the signal to pass
through, fewer connections and switches, again
adding to the purity of sound. This simplicity also
means that we can use higher quality oversized
components, such as 2w resistors.
The use of popular valves, which are still in
production, means that obtaining replacements is
easy and inexpensive when necessary.
In the process of building the LA5TX to its high
standard no corners have been cut and we have also
paid close attention to the appearance.
The remote control has its own separate power
supply so the operation will not influence sonic
qualities.
The final result is an amplifier with excellent
characteristics, with an accurate yet smooth and
transparent quality.
Various upgrades are available at the time of
ordering or may be retro fitted. These include
“Mundorf” capacitors and various valves including
“Full Music” which will enhance the performance of
the LA5TX.
IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH &
SAFETY INFORMATION FOR
YOU AND YOUR AMPLIFIER.
PLEASE READ & KEEP SAFE
AND REFER TO IF NECESSARY
