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Real balance
HP Amp/Preamp
Phoenix
Input: XLR X2 / RCA X2 /ACSS X1
Preamp
Output: XLR X1 / RCA X1
HP amp output: 4PinsX1/3PinsX1/6.5 X1
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Phoenix reviews:
http://www.head-fi.org/forums/f5/audio-gd-phoenix-balanced-headphone-amp-417553/index107.html
http://www.head-fi.org/forums/f5/review-audio-gd-phoenix-balanced-solid-state-headphone-amplifier-445766/
Skylab comment:
"[T]he
Phoenix sets a new bar of performance in @$1K solid state headphone
amps, and this is a very high bar indeed."
http://www.head-fi.org/forums/f5/review-kingrex-technology-headquarters-hq-1-solid-state-home-headphone-amp-preamp-448483-print/
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. |
Phoenix aspect
Power supply box
Signal amp box
Volume control
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Follow some users advice, we add some vents on the Phoenix power
box, the inside temperature drop.
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Please Note:
1，Before powering on the Phoenix, users
must connect the DC power cables and data cable.
2， Phoenix sound is neutral and faithful like (very neutral and less coloration,
just as " a wire with gain" ),
its SQ depends most on the quality of the source and recording, if
the source or recording is not good, then the sound quality will not
be good either. Please keep in mind and think about this aspect if
neutral and faithful like sound will suit your taste before you place an order
for Phoenix.
3, In Phoenix volume control, memory function is default (users can
cancel the memory function), volume display “00" is the minimum
volume. While using Phoenix for the first time, users must make sure
that the volume is set on minimum.
4, Because Phoenix apply the aluminium foot ,
if users want to stack or side by side place ,don't let the foot
and classis box or two classis box direct
be joined .
Specification
Dimensions:
width 250mm, height 80mm and depth 360mm.(Per classis box)
Price:
USD1200
(Excluding shipping charge)
(After you make the payment ,please send us an email to confirm.
Because a lot customers' paypal accounts are different from the
communicate email, so we can't sure who have paid. If we make
something wrong , the customers maybe paid for the other people.)
Illustrations on how to modify the headphone so that it can be
connected to the Phoenix 4 pins HP amp output.
Click here to read:
modification
The parts of the headphone
modification, price is USD30,
(inc one female 4 Pins plug and one male 4 Pins plug,
some tapes and some WBT tins.)
Audio-gd
exclusive power cable and XLR cable：
Cable links
http://www.audio-gd.com/enweb/en-line.htm
Shipping
Charge:
http://www.audio-gd.com/enweb/shipping
cost.htm
(After we ship, and while we can check the track No. in the express
web, we will send the track No. to you.)
Delivery Notice:
http://www.audio-gd.com/consignment.htm
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ACSS (Current Audio Signal Transmission) file
download:(Files1-6)
http://bbs.audio-gd.com/dispbbs.asp?boardid=7&id=10497&star=1#39123
Characteristics:
A true fully balanced headphone amp with preamp function.
Adopting the Current Audio Signal Transmission (ACSS) technology in
audio circuits,so Phoenix sound as " a wire with gain" .
First in the world to apply ACSS technology in power transmission.
Power supply is a two stages class A parallel voltage regulator
design.
Digital remote controller system with user defined functions and
offers a high precision, no sonic degradation and smooth transition
volume adjustment.
Use of LED display panel instead of the popular VFD display device,
as VFD can cause disturbance in audio circuits.
Design Features:
The Phoenix applies ACSS (Current
Audio Signal Transmission) technology. The heart of our ACSS
technology is in the ultra low distortion BPM-7110 V2 module. The
sound of Phoenix is neutral and faithful like, very neutral and sounds
exceptionally clear and transparent. Soundstage is precise, three
dimensional and huge, detailed and lifelike midrange, and
transparent treble with tight and extended bass.
Phoenix has five pairs of inputs, one pair of ACSS current mode
input, two pairs of balanced inputs on XLRs and two single-ended
inputs on RCAs. If the input
signals are coming from XLRs and RCAs, they are internally converted
into current signals and then amplified. To use the Phoenix as a
preamplifier, there are 2 pairs of outputs, one XLR and one RCA for
your power amp connections.
In order to minimize interference, the left and right channel
circuitries are completely separated from the digital LED display
and controller modules to minimize distortion of sound quality.
Three special transformers are used to supply power separately for
the audio and control circuit. The signal amplifying section and the
voltage and control section are separately installed in different
chassis which further enhances the transparency of the tone to its
peak. To achieve a perfect performance, Phoenix also applies the
complex two-stage parallel-stabilized voltage supply to get a purer
power supply so that a better sound quality is guaranteed. We are
the first people in the world to apply and make use of the ACSS
power supply.
Phoenix uses a heavyweight all aluminum alloy chassis to prevent the
eddy current of the transformer from interfering with the circuit
board. Phoenix net weight of 16KG. Furthermore, the
interior is separated into 2 sections by aluminum boards for the
best channel separation.
All the sockets of Phoenix use Hi-End grade products, and it is
sealed by WBT silver solder. Everything that we have done has been
for better audio and sensational effect.
The control function of Phoenix is very user friendly. The volume
switch adopts IV method, which effectively decreases the effect on
tone quality. The overall impedance is invariable, and the change of
volume also applies in other ways. To lower the control circuit’s
interference on the audio circuit,
we have applied a high-speed
optocoupler to separate control signals and executing sessions; in
the same way that other sky-high priced imported equipment adopts to
improve quality. When not operational, the control circuit is
stopped and the control signal is temporarily stored in the memory,
which also outputs direct current levels to control the executing
session. This will effectively eliminate the detrimental effect
caused by long-time data output of an ordinary control circuit.
Phoenix has a memory function. It can independently memorize the
status of the 5 input channel groups; and maintain them even when
the machine is shut down. Unlike machines without a memory function,
the input channel and volume do not need to be adjusted every time
the machine is operated. This function brings a more convenient and
pleasant way for users to enjoy music.
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About volume in ACSS circuits:
Phoenix use ACSS technology, which
is very different from conventional technology.
In conventional technology the gain is fixed, like 3DB or
6DB.
But in
ACSS technology the gain changes with
volume, and while you close the volume, the gain is -80DB or
-100DB (in conventional technology it can't work lower than
0DB).
While you are listening in normal volume, the gain
may be around -50DB, or between -80 to +12DB.
The volume control is also different from
conventional technology. Conventional technology volume
control is placed in the input, and attenuates the signal.
But in ACSS, it is placed at the
ACSS modules output,
where the output is the current signal, not the voltage
signal. The volume control is I/V change, and the volume
depends on the current (I) change to the voltage (V). (Like
D/A chips output I/V change)
As you can see, ACSS circuits have no gain, as it is a
completely different circuit.
The SQ benefits from I/V change volume control. Mark
Levinson also knows that current volume control has great
benefits, so in their Top End preamp NO.32 volume control,
they use many components to change the signal to become
current signal (I), then through the R-2R network to control
the volume, and then change back to voltage signal (V)
again. But Phoenix is simply a more complete work in terms
of the current signal, and technically, it is superior to
conventional technology.
ACSS is fully non-feedback with very low distortion,
so sound is neutral (neutral and faithful) because it has no feedback
effect.
How to
choice the function in Phoenix :
With the Phoenix, the user has a choice of 70 steps and 99
steps of volume control, and you can also choose whether to
have volume memory.
1. Choose 70/99 steps volume control:
Step A: Push on the "Debug" switch.
Step B: The display shows as below pix.
Step C: Turn the volume knob; choose display 70 or 99 on
right.
Step D: Push off the "Debug" switch.
70 step volume
control
99 step volume control
2. Choose volume memory:
Step A: Push on the "Debug" switch.
Step B: Turn the selector knob; let the display show as
below pix.
Step C: Turn the volume knob; choose display "ON" or "OF" on
left.
Step D: Push off the "Debug" switch.
Volume memory active.
Volume memory off.
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The SQ
style of Phoenix:
" A wire with gain".
Usually, in our products, if I use ACSS technology, I will design
the sound signature as neutral .Although I can change the style to
other, such as tube like, warm, colored, but I personally love
neutral sound.
Neutral in my mind, is neutral and faithful like, Phoenix doesn’t’t
have any particular character, like our other ACSS products, its
sound depends on the source, Phoenix reveals to you the merits or
shortcomings of your source. It only drives the HP, without
coloration. I think, use of the word "neutral and faithful" will better than the
use of "neutral". |
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The
input/output of Phoenix:
Phoenix has ample inputs and outputs, and includes two RCA inputs,
two XLR inputs, and one ACSS input.
When fed with an
RCA signal, Phoenix can change the RCA signal to an exact XLR signal
at first, then change to a current signal to feed ACSS modules.
When fed with an
XLR signal, Phoenix can re-proofread the XLR to complete mirror (
exact ) XLR signal, then change to current signal feed to ACSS
modules. In cases where the source output XLR signal is not exact,
(Hot signal level not same with cool signal level' absolute value)
through this re-proofread process, it can correct the signal to
produce an exact XLR signal.
In short,
whatever the input might be, Phoenix will output XLR signal to
Headphones, unless your HP is plugged into to SE output sockets.
Phoenix has one 4
pins and two 3 pins and one SE sockets as output.
Phoenix ACSS input can match to our
follow DAC:
DAC Reference One
DAC Reference Two
DAC-9MK3
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Two pictures of Phoenix
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About Chinese
Phoenix:
The Phoenix is a mythological bird in China. They are one male
and one female .They live together whole life.
Phoenix are the kings of all birds, all other birds will fly flow
them .
Phoenix are the lucky birds, While Phoenix recur in workd ,
the world will peace , people can live much ease and much rich. |
