Audial AYA 5, Руководство пользователя, Страница: 3 / 8

AYA 5 DAC
Audial AYA 5 is a high quality, TDA1541A based non-
oversampling D/A converter, with USB, S/PDIF
electrical (coaxial), and S/PDIF optical inputs.
The AYA 5 USB input stage operates as an
asynchronous (master) USB device, so it also
generates the clock signal for the D/A conversion. Two
low jitter clocks are included, one that works with
44.1/88.2/176.4/352.8 kHz, and the other that works
with 48/96/192/384 kHz audio sampling frequencies.
This way the unit achieves
a clean clocking scheme,
and all the audio clock signals in the system are
generated only by frequency dividing, and not by
using PLL synthesizers.
With this USB input, the AYA 5 supports sampling rates
up to 384 kHz. Please note that the Windows audio
does not support operation above 192 kHz, so the
ASIO driver is required to utilize this feature.
The USB stage also provides galvanic decoupling
between the USB and D/A stage, thus separating
possibly noisy PC from audio circuits.
Th e AYA 5 USB stage supports the four channel
operation. The first two channels D/A conversion is
performed by its own D/A stage, so the AYA 5 normally
operates as a stereo DAC, while two additional
channels are available as a digital output on the HDMI
connector, which complies with Audial
A-link
specifications. The third channel is available at pin 1,
and the fourth channel at pin 10. Detailed A-link
specifications are available on the Audial website.
The AYA 5 also employs 75 Ohm BNC, transformer
coupled S/PDIF, and optical input, operational up to
96 kHz Fs.
Optionally, the AYA 5 can also provide a PCM direct
input to TDA1541A, by using HDMI (A-link), or by using
the set of PCB U.FL connectors, and these inputs can
accept either I2S or Philips simultaneous data
protocol. Detailed information about this AYA 5
optional feature is provided separately, to the AYA 5
customers.
USING THE AYA 5
The AYA 5 mains connector and switch are located on
the backplate, while the input selector is located on the
front plate, along with the power LED indicator.
The AYA 5 DAC is easy to use device, and normal ly it
requires no special maintenance or care.
It is however not recommended to leave the AYA 5
permanently powered up, because its D/A converter
chip (TDA1541A) is a classic TTL architecture, so it
dissipates more power than it is usual for devices of this
kind these days.
Gener ally, leaving the AYA 5 powered
off overnight will ensure many years of reliable
operation.
The AYA 5 achieves claimed technical performance
(distortion, frequency response , etc.) right from the
start, however it needs a couple of weeks of burning in
to perform its best in subjective sonic terms.
WARRANTY
Audial claims proper working of this product for two
years. Audial is obliged to correct any malfunction
within this period, at no charge, either by competent
repair service, or by swapping the sold unit
with the
new one.
For the units sold directly by Audial, the invoice is also a
guarantee certificate. Since Audial maintains database
of directly sold units, the original buyers in most cases
won’t need it. Warranty is still fully transferrable from
the original to the subsequent owner(s), however in
this case we will probably ask for the invoice.
3 Audial AYA 5