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dac reference one features
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09 Hi-End DAC
Reference One (24Bit/96KHz)
DSP-1 inside
(Using 8 Pieces of PCM1704UK Chips Group
and Current Transmission Technology Applied)
(ACSS/XRL/RCA output)
(Truly balance DAC)

DSP-1 Function Operate:
C:/…/Reference One.htm

About ACSS:
ACSS (Audio-gd Current Signal System) is Audio-gd's system for transmitting audio signals in the current domain. This
concept, first seen in 1966, we have used for many years, and since 2006, have evolved the technology to include all audio
signals in our systems from the digital source to the power amplifier. Since 2007, ACSS components have become Audio-gd's
most popular products, with a great many customers purchasing them in China and Hong Kong.
DAC Reference One Applies Current Transmission Technology , even though maybe you only
connect to XLR or RCA output, but Reference One will always operate in ACSS technology, and
benefit from ACSS technology, Therefore, XLR and RCA output will also definitely bring about
improvement in SQ.
DAC Reference One Technical characteristic:
DAC Reference One is an upgrade based on DAC-8; it is also the first product using LSI processor DSP-1.
DSP-1 Devices Characteristics:
1. Features: Digital & Analog / Left & Right Completely Separated Internal Layout, from power transformer and rectifiers etc, the radiating
interference are carefully shielded.
2. Performance: DAC Reference One 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 jitters. So DAC Reference One can offer a clear and focused soundstage, apart
from accurate and neutral reproduction of the recorded disc/music.
Theoretically 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
experiment, although we could perceive the sound quality difference between differently priced and level of CD transports (as an audiophile,
you just 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 typical digital processor chip like PMD-
100, DF1704 etc.
3. Clock phase noise: Many amateurs 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. ACSS output Module : The super scale ACSS module is newly developed with more advance technology and dedicated for DAC
C:/…/Reference One.htm

Reference One to produce even better sound quality. High precision electronic components are used to guarantee accurate balanced output.
All electronic components are highly calibrated products in the circuit board. DAC Reference One has true balance, RCA, and ACSS outputs.
Whatever the output chosen, the signal will go through the ACSS processing technique, ensuring the original musical characteristics of
PCM1704UK without any kind of coloration.
5. Tin: DAC Reference One uses only One solder which is WBT tin.
6. Vibration and interference resistance: To achieve the best performance of DAC Reference One, heavyweight pure aluminum alloy
chaises is used which prevents the eddy current of transformer 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 Method: BNC coaxial and RCA coaxial inputs are available. The difference of extra jitter, in excess of what is produced by the
transport, between BNC coaxial and RCA coaxial or AES/EBU inputs, is 10 times less in BNC compared to RCA or AES/EBU, and 20 times less
than that of TA&T Optical input.
8. Power supply: DAC Reference One uses three different types of power 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
U.K. according to Audio GD’s requirement. Total applied 21 groups PSU. 19 groups of parallel voltage regulators are combined into two
groups of cascade-like parallel voltage regulators to lower the internal resistance and to purify power supply. To achieve Silent operation, the
control circuit is powered with 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.
Device weight: DAC Reference One approximately 15 Kg
Advice: 1,DAC Reference One has extremely high fidelity; its SQ is neutral, accurate and neutral reproduction of the recorded disc/music.
2, Don’t stack gears one on top of the other.
3, Attention must be given to matching 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). This product comes without power cable.

C:/…/Reference One.htm

reference one



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