Audial AYA II, Руководство пользователя, Страница: 5 / 10

Getting started
Other than D/A converter itself, a packing
box is supposed to comprise:
1. Mains cord
2. RCA female to BNC male adapter
3. Printed copy of this manual
4. Invoice (for units sold directly by Audial).
RCA to BNC adapter is supplied to help
experimenting with different S/PDIF cables
since these, per rule, come fitted with RCA
connectors. This adapter is not a long term
solution since S/PDIF transmission line is
supposed to be 75 Ohm line, and hence we
highly recommend using the real 75 Ohm
BNC plugs; RCAs don
’ t belong here.
Use of mains cable of higher quality than
t h e
o n e s u p p l i e d i s a l s o h i g h l y
recommended, whether an after market or
DIY one. Solid core cable is suggested.
Connections
Everyday use
Earthing
No special knowledge is required to
connect AYA II into the system.
Mains connector is standard IEC C14 (cable
is supplied, as stated above).
The AYA II comprises two inputs:
1:
(BNC connector), intended for
connection with dedicated CD transport, or
appropriate digital output found on the
integrated CD players, or any other device
comprising
adequate S/PDIF output
(soundcards etc.), and
2:
(standard USB B connector) which
has to be connected with USB host, which is
most often a personal computer with
adequate USB port (either 1.1 or 2.0).
T h e AYA I I u s e s n a t i v e Wi n d o w s
98SE/Me/2000/XP/Vista and Mac OS
9.1/OS X 10.1 drivers. No additional drivers
are required. Connecting the AYA II to the
PC for the first time, the installation wizard
will appear and it will guide through the
process. If it doesn ’ t, it is probably because
the given PC preciously had a session with
the same decoder used in the AYA II. In this
case, it should simply recognize the AYA II in
a couple of seconds.
Use of foobar2000 is suggested. To learn
how to bypass Windows kMixer, please visit
www.audialonline.com/articles/kmixer .
The AYA II is easy to use device, and has two
switches only.
The mains switch is located at the rear
panel, within the block comprising also IEC
mains connector and fuse.
The AYA II may need a few weeks of burning
in. Leaving it constantly powered on for
d a y s
o r w e e k s i s h o w e v e r n o t
recommended, because used TDA1541A
D/A converter chip utilizes a classic TTL
architecture, and thus dissipates more heat
than is usual for devices of this kind. After
initial few weeks of burning in, it will be
normally enough to leave the unit powered
on for about one half of hour before critical
listening.
The toggle switch on the front panel is the
input selector (down for USB and up for
S/PDIF). LEDs located at the front plate
display lock i.e. activity of particular
interface. When S/PDIF input is selected,
USB stage is disconnected completely from
the rest of the unit, including its ground,
thus cutting the path to possible noise
entering audio system from PC.
The chassis of AYA II requires connection to
the safety earth. Normally this is done by
use of three prong mains cable. It is
however important to remember that a
galvanically coupled system requires only
one connection to the safety earth. This in
S/PDIF
USB