Audio Note DAC5 Signature 2007 - Manual (Page 8)

The DAC 5 Signature features an upgraded version of the M6 preamplifier line stage,
using a 5814a (ECC82 / 12AU7a / 6189) and a Telefunken 6463, both of which are
dual triodes valves. These are coupled to an output transformer, wound with Audio
Note (UK) silver wire on a 55% Nickel Audio Note (UK) Supa-Perma C cores. With a
33:1 step-down ratio, this output transformer not only has exceptionally wide
frequency response, but also just about the absolutely best dynamic transfer function
possible. The analogue output has provisions for both usingle ended and balanced
operation, using the best available quality RCA and XLR connectors.
To power this spectacularly revealing arrangement, we have incorporated a
simplified version of the Galahad power supply found in our M8 preamplifier. This
supply features full valve rectification, regulation and voltage stabilization. This
technique not only provides excellent isolation between the digital circuitry and power
supply, but also provides well-isolated short and clean analogue signal paths. The
digital power supply is an exceptionally low noise, shunt-type.
Internal component quality of this caliber has never before been seen, in either
consumer or professional equipment. There is an abundance of Black Gate and
Cerafine Audio capacitors, and Audio Note (UK) Tantalum film resistors throughout
the circuit. Analogue stage filter inductors and internal wiring are all produced with
Audio Note (UK) 99.99% pure silver wire.
Please take care when unpacking your
DAC5 Signature. Choose a clean, clear
location to unpack your unit. Be aware that the Pre Amplifier is very heavy; before
attempting to unpack or lift the unit, check the weight and if necessary use more than
one person so that it can be moved safely and easily.
We recommend that you retain and carefully store all of the original packing
materials, in case transportation / shipping is required at a later date.
Select a suitable location for the unit. This should be a dry, dust free and level area,
preferably shielded from direct sunlight and free from vibration. Also ensure that the
location is stable and capable of carrying the weight of the unit.
A suitable mains power outlet must be close to the location; power cords must not be
pulled or stretched tightly in an attempt to reach a wall socket. If the power cord will
not easily reach the socket, choose a closer location!
Please ensure that adequate ventilation for the unit is provided, and that airflow
through any ventilation slots in the unit is not restricted. We recommend a distance of
at least 20cm free space is maintained above the unit. Please also remember that
valve equipment operates at extremely high temperatures, so a position that is
inaccessible to children or animals is essential.
UNPACKING AND INSTALLATION
DAC5 Signature continued…