Applies all audiophile grade components,
including DALE resistors, WIMA & EVOX caps (German brand) and solen
caps, custom order NOVER (UK brand) caps, all audiophile grade input
& output sockets and gold IEC socket.
Reference 9 has
our newest design of Diamond analog amp for the output stage, this
upgrade can improve on the soundstage and background.
Reference 9 Technical characteristics:
1. Features: Digital
Analog / Left & Right Completely Separated Internal Layout,
from power transformer and rectifiers etc, the radiating interference
are carefully shielded.
Reference 9 has built in DSP-1 processor, which is a Two-channel
Digital Interpolation Filter and data in-phase processor for digital
audio. This Device offers advanced features for high-performance
digital signal processing (DSP) applications up to 250-MHz. Data and
Master-clock in-phase processing are without jitter. So Reference 9 can
offer a clear and focused soundstage, apart from accurate and neutral
reproduction of the recorded disc/music.
when using the DSP1, data will be running parallel,
achieving near zero jitter state, no matter the level of CD transport
attached, be it hypermarket grade or hi-end level, you will still be
getting the best and similar sound quality! Practically, through some
experimentation, although we could perceive the sound quality
difference between differently priced and level of CD transports (as an
audiophile, you can¡¦t just follow pure theory, but you must also
venture the practical side too), but final result shows that using
entry level CD transport or hypermarket grade DVD player, the
improvement of sound quality is huge compared to a typical digital
processor chip like PMD-100, DF1704 etc.
3. Clock phase noise: Many
are aware that jitter affects the quality of digital and audio
circuit, but the biggest effect is on clocking phase noise, this gear
has extremely low phase noise due to circuit linearity and our sensible
layout design, which guarantees pure power supply as a whole, achieving
high transparency, detailed and transient performing sound signal.
4. Diamond differential
output circuits : Benefit from two high speed diamond differential output
circuits, excellent linearity and low phase distortion, diamond
differential circuit is being loved and supported by more and more
audio fans. Although the circuit is complex, the sound quality is
impressive. We've done a lot of study and experiments on diamond
differential current these many years, aiming to get a better solution
of circuit design.
For a DAC, high analyzing ability
is the most important requirement. The detailed recurrence of
resolution lies in the upward and downward characteristics and the
noise level of the output amplifier. Because output amplifier is the
bottleneck, if the upward characteristic is not good enough, the signal
cannot be followed correctly on time and the amplifier can only catch
half or even less of the signal level before it disappears. This leads
to a downsizing of the original range of signal output from DAC, which
directly causes obscurity or even loss of sound effect and a low
analyzing ability. A lot of DACs, therefore, even with a highly
analytical D/A converter in the digital section, cannot play most of
the details due to its low analog circuit speed. To get a good upward
characteristic, the only way is to use a high-speed low-noise
transistor amplifier. Even operational amplifier and tube cannot
compare with high-speed low-noise transistor amplifier in effectively
lowering the TIM distortion which has a big impact on the sound quality
and promising a pure and pleasant sound delivery.
9 uses WBT tin solder.
6. Vibration and
interference resistance: To
the best performance of Reference 9, heavyweight pure aluminum
alloy chaises is used which prevents the eddy current of transformers
from interfering with circuit board. The device net-weight is 12.5 Kg
without packing. The inner sections are separated using 5MM aluminum
boards among digital/analogue left/right channel components, which
eliminates interference among the circuits.
7. Input mode: Reference
9 has AES and
BNC and RCA and Optical, four separate groups of digital input, and two
sets of RCA output. Optional USB input available.
8. Power supply: Reference
uses three R-core transformers to match different electric circuitry.
The power transformers and rectifiers are carefully shielded from the
electric field of the power transformers and rectifiers¡¦frequency
transmission. More than 50,000uf audio grade NOVER capacitors are used
to ensure ample and smooth power feed. The NOVER capacitors are
specially made by NOVER (U.K.) according to Audio GD's requirements. 21
groups of voltage regulators are combined into two-stage regulators,
respectively feeding power to different circuit parts for a pure power
supply. To achieve Silent operation, the control circuit is powered
with a separate regulator. Such power supply setup is rare in domestic
designs, and more common in Hi-end DACs made by renowned Audiophile
Companies, which plays a crucial role in the performance of their DACs.
weighs approximately 15 Kg
W430 X L430 X H85 (MM)
1, Reference 9's sound
signature is musical and detailed, with a little coloration and a
little on the warm side, and will be forgiving of poor recordings.
Reference 9 can allow the sound to be a bit richer and better .
It is better not to stack gears on top of each other, if one must
9 on other gear, place a piece of paper or another
insulating material on top of the other gear, because Reference 9 has
conductive aluminium feet.
Attention must be given to pairing suitable power cable, coaxial
cable and output signal cable.
Accessories : One Canare coaxial
cable (we have BNC->BNC, RCA->RCA and RCA->BNC, customers must
inform us of their preferred type of cable while placing the order).
One stock power cable (PC grade).
power cable, XLR cables & Canare coaxial cable¡G
Cable links http://www.audio-gd.com/pro/cablesEN.htm