1，Because the electric
parts price is increasing crazy and very long leadtime , especial
the CPLD and FPGA chips which is apply in the DI-20HE that the price
is increasing to 500% and over 24 week leadtime now ,we have
less chips in stock, we had to only sale the DI-20HE to Audio-gd DAC
users , we don't warranty it can work with other brands DACs.
2，The DI-20 had built in
ultra speed isolation, for work most stable, don't connect external
USB isolation , just let the USB connect to computer directly.
There are a lot different IIS definition exist with other brands ,
we only warranty work with our DACs, we can not warranty work with
Click to download the
(Only for WIN, other operate systems without
driver install necessary)
Please note : The product has built in Amanero USB interface, it's
USB can compatible well with the WINs, Apple OS/IOS and
computer type Linux /Android (Include PI,ROCK64, newer model Android
phone and TV) but we can not promise it can compatible well with
the non computer based digital transports' USB output.
Please note :
1, The product price is expensive , we suggest the customers have
the R-8 or R-27 or higher grade DACs , then consider if want to
purchase . If the product connect with the low grade DACs, can not
show its real sound quality level .
2, The product without power cable, customer want to has the
high quality cable for it .
1, Built in regenerative power supply as built in a private power
generator ,it built with pure class A PSUs and pure class A
full balanced drive amps.
2, Built in the Amanero USB interface that is the most compatible
and steady ,during test ,click and change the music track random
without any hang , support WIN, OSX, IOS and Linux , and had been test
with some TV that is based on Android system. (Has not test with
Android phone yet ).
3, Built in 10MHz external clock input connector .
4, Built in main clock/ Wck output connector, the output clock type
can set by user.
5, USB and Coaxial input (support DOP) can conversion to HDMI-IIS
and coaxial output . The coaxial input and output interface had
designed in the FPGA but not built in the USB chip, due the high
speed of the FPGA so can improve on sound quality and support up to
6, HDMI-IIS output can set the definitions of PCM and DSD through
the display menu .
7, built in the best sound R core transformer and 13 groups
ultra PSU become double stage power supplies, supplys to the
different signal parts separately .
8, Built in the 150M high speed isolator between USB interface and FPGA signal processor. Because the isolator can effect the data and
clock transmit, so the FPGA has corrected the timing to improved on
sound quality .
9, The USB inteface and FPGA processor have applied the same clocks
for avoid the different clocks effect the sound quality .
10, FPGA data process mode can select either parallel or series mode
The USB output IIS data is series transmit
mode, every data must need one clock cycle to process or transmit,
one frame data ( Include L and R data) must need 64 clock cycle to
process or transmit, so the data has effect by the 64 clock cycles.
But the parallel data process
and transmit mode only need one clock cycle can finish the one frame
and transmit, that can avoid the effect of clock stability .
The USB input and the S/Pdif
decoder output data has recombine become dual 32bit parallel data
once input , and the DSD input has
recombine become dual 64bit parallel data once input.
The parallel process and
transmit mode can improve the sound quality on the transparency and
detail but still analog.
In the parallel process mode,
all data processing by 256fs clock frequency, but not the usual mode
that different sampling music data with 64-256fs variable clock
frequency. The fixed 256fs clock frequency makes the signal has more
exact timing in phase,
process with same timing to keep the sound flavor is same.
11, Full new configuration clock manage design built in, improved on
the clock timing .
12, The display can show the sampling of PCM and DSD, and it can as
the interface between human and machine, allow user change the
setting in the unit .
13, Built in USB firmware update button and FPGA firmware update
connector, update firmware without open the unit, and support sound
quality upgradeable in future.
14, The digital data and clock even more easy effect by transmit
than the analog signal, cause the DAC sound worse even can not work.
So the DI-20 built in multiple strong drive ability chips to drive
the different data and clock, to reduces the effect during transmit
15, The 2nd generation ACSS SPdif output design that is invent by
Kingwa, which offers even further reduced signal degradation and
better sound quality over a coaxial cable . The DI-20 also design
standard coaxial output connector, with built-in silver wire