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Description:
Although physically similar to its predecessor, the DAC8 represents
new engineering that advances the state of the art in high resolution
USB audio and S/PDIF audio.
Audio Research has maximized the USB capability of the DAC8 by
incorporating USB 2.0 HS (High Speed) which runs at 480Mbps. USB
2.0 HS has a lower jitter specification than USB 2.0 FS (Full
Speed 12mbps), consequently the DAC8 is capable of reproducing
music at higher definition/resolution (up to 24/192) than products
communicating at USB 2.0 FS speeds (24/96).
In addition, the DAC8 employs a low jitter Dual Master Oscillator
design that will provide superior digital to analog conversion
via its USB 2.0 HS input as well as via the more traditional S/PDIF
(RCA, BNC, Toslink and AES/EBU) inputs that are also included
on the DAC8. Our USB 2.0 HS audio interface is optimized for all
six sample- rates currently in popular use; 44.1, 48, 88.2, 96,
176.4 and 192kHz.
In the past, S/PDIF was the default interface mode for High Resolution
music files at 176.4 and 192kHz. Now, with Audio Research’s
Dual Master Oscillator, USB 2.0 HS interface, and our Quad D/A
converter design, USB audio is finally elevated to the status
once dominated by S/PDIF.
Consequently, regardless of whichever digital input you select,
the Audio Research DAC8 promises to provide a superior listening
experience.
DAC8 HD Audio Device" software drivers, which allow listening
to your music in its native sample rate as well as assuring BIT
PERFECT, low jitter, data transfer from the computer to your DAC8.
Because PC and Mac operating systems do not adequately support
sample rates over 96kHz, Audio Research has developed ASIO drivers
to make the USB audio experience sonically transparent at all
sample rates.
•Sample Rate measuring function: Measures and displays
the correct digital sample rate being sent to the DAC8. This works
in USB as well as S/PDIF mode. Consequently, at a glance, you
always know exactly which sample rate is being decoded.
•The DAC8 employs four 24-bit D/A converters. Each channel
uses dual 24-bit D/A converters running in mono mode to lower
the noise floor and increase the dynamic range.
•Dual Master Oscillators: When the time base of any DAC
is not an integer multiple of the digital music sample rate, decoding
and quantization errors occur. Consequently, the DAC8 uses two
low jitter Master Oscillators; one for 44.1, 88.2 & 176.4kHz
sample rates and the other for 48, 96 & 192 kHz sample rates.
The DAC8 automatically selects the correct Master Oscillator the
instant digital music is detected at the selected input.
•All inputs are galvanically isolated from the source
to reduce or eliminate noise and/or jitter from entering the DAC8.
•The Analog amplifiers in the DAC8 have received the same
attention to detail as the digital section. Each channel of the
DAC8 uses a true direct-coupled differential amplifier with a
bandwidth in excess of 90kHz.
•The DAC8’s USB and S/PDIF inputs are designed to
accept signals from an HRx, 176.4kHz, 24-bit, High-Resolution
music server system playing HRx’s DVD-R recordings.
DAC8 HD AUDIO DEVICE SOFTWARE DRIVERS:
The DAC8’s USB driver software provides your computer with
special high-speed audio drivers not supplied by MS Windows or
Mac OS. The Audio Research USB drivers are specially designed
to assure low jitter BIT PERFECT data transfer between the server/computer
and the DAC8 at all sample rates. Our drivers setup the USB interface
to guarantee bandwidth, independent of active bulk transfers from
the hard drive.
From the ARC icon in your computer’s input tray you can
set the DAC8 to any sample rate from 44.1 to 192kHz and allow
the music server/management software to up or down convert your
music to the selected sample rate.
Music lovers can use custom sample rate conversion algorithms
or other file formats provided by third party suppliers such as
Windows Media Player, iTunes, J Rivers Media Center, Media Monkey,
FooBar, and many others to optimize your music experience.
The DAC8 is a fully balanced, zero-feedback, solid-state design
utilizing a direct-coupled FET output stage with generous regulated
power supplies and seven stages of regulation. There are separate
new digital and audio power transformers, and the board material
is the same as what we use in our Reference products. Dynamic,
forceful, immediate, and possessing remarkable resolution and
transparency, the DAC8 is a sonic knockout that is worthy of the
finest music systems.
With a choice of high-resolution 24/192 S/PDIF inputs (RCA, BNC,
AES/EBU and Toslink) in addition to the highest resolution 24/192
USB available, the ability to adjust sample rates, the DAC8 provides
the new standard in high performance digital music playback