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32kHz - 192kHz wide-ranging input sampling
frequency, with 24-bit input
The D-70 is an advanced D/A converter compatible with all two-
channel linear digital sources, as well as top-quality CDs. It
conforms to the AES 3 standard for dual-wire (XLR) input when
accepting data at 176.4 kHz or 192 kHz.
UP conversion feature allowing a maximum of
24 bit/768kHz
Two different filter algorithms: FIR (equivalent to HDCD), and
RDOT can be selected at the digital stage.
Custom settings can also be made, by using the two different
filters in series, for up to 16 times oversampling. Firstly, employing
the sharp roll-off characteristics of FIR, the more natural
extended characteristics of RDOT doubling the frequency can
then be added to produce a more musical result.
WORD SYNC output allowing synchronization
with CD transports, DD converters, etc.
The D-70 is further enhanced by the inclusion of word sync
outputs. This provides a very stable input to the RAM Link buffer,
and helps enhance the natural nature of the final audio signal.
Three kinds of GIC analog filters on the left
and right channels
Three different types of analog filter are provided in order to cope
with the range of input sampling frequencies, from 32 kHz up to
192 kHz, and the most appropriate filter is automatically selected.
These filters are based on secondary Butterworth GIC filter. The
automatic switching system isolates all filters, except the active
one, using relays, and inactive filters do not appear in the signal
path. This combination of features has the effect of producing
lossless high-quality filtered sound.
Discrete transformers for digital and analog
circuitry
This system completely removes any intra-system interference,
and provides clean regulated power independently for the digital
and analog sides. This is the cleanest, most precise power supply
that we can devise.
Ready for a IEEE 1394 interface (SACD and
DVD-A format compatible)
IEEE 1394, the next-generation high-speed digital link, is in the
process of inter-manufacturer standardization for employment
with the SACD and DVD-A formats. As soon as the necessary
steps for standardization have been agreed, the D-70 is
ready----with the ability to add a IEEE 1394 interface to the rear
panel. Rather than rush forward, we have decided to wait until
the standards have been set for both SACD and DVD-A, allowing
a dual simultaneous expansion of capabilities.
Super-solid body brings out the sound quality
A solid heavy (25 kg, or 55 lbs) body and chassis, uncommon on
DAC units, enhances bass response and feeling, as well as
improving the overall sonic performance.
< An 8 mm-thick steel base sheet totally isolates the unit from
external vibration.
< Triangular pinpoint feet composed of hardened steel help to
complete the mechanical isolation.
< Sturdy internal construction, using seven major functional
blocks, electrically isolated and independent from each other
to provide the best possible quality: digital, analog, power
supply (digital), power supply (analog), AC primary, word clock
and transformers.
HDCD® Decoding
While ordinary CDs are digitized to 16-bit resolution, discs
mastered to the HDCD®(High Definition Compatible Digital®)
standard use 20-bit resolution. Such discs are compatible with
ordinary CD players, but in order to obtain the maximum benefit
from the new process, you need an HDCD decoder.
The D-70 is equipped with HDCD, and can decode HDCD
recordings !
HDCD system manufactured under license from Microsoft
Corporation. This product is covered by one or more of the
following:5,479,168, 5,638,074, 5,640,161, 5,808,574, 5,838,274,
5,854,600, 5,864,311, 5,872,531. Other patents pending.
, HDCD®, High Definition Compatible Digital®, and
Microsoft® are either registered trademarks or trademarks of
Microsoft Corporation in the United States and/or other countries.
Multiple features for the best possible sound
Multiple digital inputs (three types, seven sets) with XLR, RCA and
TOS jacks
Two types and two sets (XLR and RCA) of analog output, as well
as a TOS optical digital output
Integral digital volume control. With the volume control, it is
possible to connect the D-70 directly to a power amplifier,
eliminating the pre-amplifier stage of an audio system. The sound
can be attenuated in 0.1dB steps to a maximum of 60dB (and
infinite cut).
Isolated pure D/A conversion when the digital data has been
read from RAM, the signal lines and the ground of the analog
circuitry are electrically isolated from the digital side, resulting in
pure D/A conversion.
The DAC is composed of four multi-bit DAC Burr-Brown PCM1704
units, with an outstanding signal-to-noise ratio and exceptionally
low distortion characteristics.
Features
