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 2005, ACSS comp5nts have become Audio-gd's most popular
DAC-19 uses 2 top-grade PCM1704UK Digital-to-Analog converters. ACSS
technology brings out the full potential and excellence of PCM1704UK.
ACSS module is newly developed with more advanced
technologies dedicated to the DAC-19 to produce even better sound
quality. High precision electronic components are used to guarantee
accurate output and all electronic components in the circuit
board are comprised of highly calibrated products. All audio signals
will go through the ACSS processing technique to ensure that the
original characteristics and nuances of the PCM1704UK are not diluted
at whichever output is chosen. The DAC-19 does not have IC opamps in
signal path and only all discrete components are used.
dual stages parallel connection cascode FET 0DB output buffers for RCA
output. The ACSS and output buffers both are Zero feedback circuits.
The DAC-19 supports ACSS output, can connect to Audio-gd ACSS input
amps like C-2 headphone amp and CIA-400 power amp. The DAC-19
uses DC servo circuits to keep the output
offset at zero, so there are no coupling caps in the analogy signal
the DIR9001 chipset to accept the digital inputs and
perform demodulation, the DIR9001 exhibits an exceptional fixed Jitter
value as low as 50PS, which is the lowest Jitter demodulation chip
at present, while CS8414/8412 Jitter value is as high as 200PS. The
DAC-19 applies a exact clock to keep the work much steady.
applies Audio-gd DSP1, which can manage Data and
Master-clock in-phase processing without jitter. DSP-1 can
specifically improve on sound quality, but does not mean the DAC is not
sources, because the sound quality can degrade not only due to jitter,
there are many other reasons the sound quality can degrade in the
Single Coaxial /Optical / USB inputs are available with RCA
and ACSS outputs.
The DAC-19 uses 8 groups of voltage regulators for
lowering the internal resistance and to purify power supply. A
separate control circuit is powered with each regulator
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.
Left button: power ON/OFF switch.
The knob: Select built-in DAC
source between USB, coaxial and optical.
Right button: Choose between RCA and
ACSS output configure. (Owners can choose this button anytime.)
Hi-end parts used:
mostly DALE and Vishay resistors,
EVOX and WIMA capacitors. The electrolyte
capacitors are custom ordered from NOVER (a UK brand), and
exact-matched transistors. RCA sockets are custom ordered and 24k gold
plated. All transistors are Toshiba and Hitachi.
All aluminum chassis (Black). Panel
The PCB employs 2MM double
copper/stringy board, 70uM copper.
50 Watt custom R-core transformer,
with a wide input voltage of 100-130V or 200-260V.
All Audio-gd's workers are hi-fi
enthusiasts and skilled electronic assemblers.
Prior to shipment, our products are
burned-in for 100 hours, and undergo a variety of tests multiple times
to ensure they work perfectly for the customer.