7
MANUAL
| AU PRE TRIODE LAB
CANADA
http://www.triodelab.com
Is not just for the looks and space savings.
The Au Pre is a compact and simple-desk
policy preamplifier. But it is not just compact.
Although we have kept all the wiring as
short as possible, we have also used top-level components throughout – it is hardwired
with heavy-duty silver plated wires, and high quality E-capacitors and parts - which
contribute to the darker and quieter noise floor.
Finally, to achieve the best signal to noise ratio and least interference, we separated
the entire power supply circuitry from the main circuitry board (have the same result as
an external power supply but keep the cost low). As a result, the Au Pre offers higher
quality and cleaner sound with excellent imaging. As with all other high-end tube
equipment, we are of course adopting the best of the old ways, in this case by using
tube rectification with a 6CA4/EZ81 tube. We also use a 6GV8/ECL85 tube to handle
the regulating and stability task. We favour it to the more commonly used ECL82/6BM8 -
- it just sounds better, and these days more affordable to the ECL82/6BM8. And yes,
every tube, including both the rectify/regulating tubes, can make a great difference
(day/night) in sound, so start looking for some NOS tubes! For the 12AU7s, we prefer new
production tubes. The EH12AU7 is what we supply with and tested / voiced with. It also
have thousands of reasons why we like it and chosen it.
Simple, but Best = Hardest in Design & Engineering
