Price: QA890(Without USB,
Without Remote control) USD
Option 1: add XMOS
USB,Add USD $100.00,
Option 2: add
Remote control, Add USD $20.00,
shipping cost)(in Stock) How buy it:Click here Warranty:Click here
The QA890 DAC designed use
double AK4495S, and It can setting the built in filter
parameter , it can auto detect the input signal DSD or PCM .
There are no design compromises, built with all high-grade
audio parts, complicated power supply systems and clock
and DSD Support
QA890 supports up to 24bit/192KHz and
input or USB) .
ALL To DSD
mode, hear more than CD
Provides 6 kinds of sound mode, include five different sound
filtering mode, the more innovative provides ALL To DSD
mode, to meet a variety of listening style needs.
ALL to DSD mode, DSD decoding due to the short path, the
decoding process is simple, full DSD decoder, no need to
find for DSD music file.
ALL to DSD mode can will all formats to SACD 1Bit 5.6MHz
high resolution, even if the original signal is PCM, after
this conversion, CD will listen more like a very fun with
the fun taste DSD sound playback.
Redesign the high quality clock
Do not use traditional TCXO clocks. We has Listen and
contrast the variety of TCXO clock, found that there is
almost a problem, the sound is too modern and the lack of
traditional music aesthetic beauty.
QA890 redesign the low noise power supply with a low noise
and low jitter clock, ensure a vivid natural sound detail
and precise stereo sound field while also having good
filter to eliminate noise and EMI
The newly developed
full digital signal / ground isolation system eliminates the
impact of noise from the digital audio processing section
and the MCU control section on the DAC.
Multiple digital signal channels to increase the custom
filter device to prevent high-frequency noise caused by
deterioration of sound quality, to achieve a clear, smooth
playback sound quality.
The isolated I2S signal will then be perfect for waveform
reproduction and clock phase correction, making the music
dynamic range wider, playback more accurate, especially in
the small dynamic ups and downs and transparency is even
Each part of the circuit independently, each circuit board
design with noise absorption circuit.
The AC earth has the corresponding device to absorb noise,
eliminating the interference of various parts of the noise
and noise, improve the signal to noise ratio, so that the
music background more quiet, improve the overall analysis.
QA890(With USB) Also have a XMOS USB Bridge to Computer
The QA890(With USB) also is
have an asynchronous High Speed USB to digital
audio interface that extracts the highest possible audio
quality from computer audio sources.
The QA890(With USB) is have High Speed USB 2.0 input data connection –
Sampling rates up to 192 kHz and word lengths up to 24 bit
Great care was taken in the
design of the QA890(With USB) to isolate the noisy computer/USB
environment from the digital audio output. The USB receiver
and processing are powered by the computer, while the output
line drivers are powered by a separate isolated linear power
The QA890(With USB) USB is designed to work with both Apple
Macintosh and Windows PC computers. Microsoft Windows PC’s
require the included Windows driver which works with Windows
XP, Vista and 7 and windows 8.
High standard power
- 2 toroidal transformer for digital and
analog circuits separately with vibration isolation and
absorbing design, and without interfering the digital
clock circuit completely.
- TPS7A4700、LT3042、LM1086、LT1965、ADP151....More than 20
independent ultra low noise LDO for each circuit module
offer the power supply, to ensure the cleanest sound.
Provides 6 kinds of
sound mode can be options (5 filters mode + ALL To DSD)
to suit different sound style preferences.
with on/off and volume control (volume set to 100 will
auto off the pre-amplifier).
Two different sound
style's coaxial input port, while coaxial 1 with
impedance automatic matching function.
2 groups AK4495S
independent for left and right channels, left and right
separation, digital and analogy separation, excellent
Using the unit price of
more than USD 20 Switzerland Schurter DD12.9121.111
Power Entry Connector Receptacle, ensure that it is in
any electrical environment are sound performance.
Silver-plated high-end input RCA coaxial socket,
balanced output using Neutrik connector.
4-layers PCB for all
quality sampling clock reform circuits.
input: RCA Coaxial*2, Optical*1,
USB*1[only for (QA890 with USB)]
format: 16bit to 24bit, up to 192K Stereo (sampling
rate and bit adaptive), DSD64(Coaxial&Optical input or USB)
Analog output: RCA*1,
Analog output: - 0dBFS signal
RCA output level: 2.2V RMS
- 0dBFS signal XLR output level: 4.4V RMS - Frequency response: 0-20Khz - S/N: 123dB - Dynamic Range: 120dB - Total Harmonic distortion: 0.0006%
- Output impedance: 80 ohm(RCA)/160 ohm(XLR)
Input Voltage: AC 110V
and AC 220V selectable
Dimensions: 215mm x
300mm x 70 mm
1--Coaxial input 1
2--Coaxial input 2
4--XMOS USB input(Option)(Otherwise have use screw lock the
aluminum to block the hole)
6--Fuse(5mm*20mm 1A or 2A)
8、9--Analog output RCA
10、11--Analog output XLR balance
Internal PCB board
(In order to improve the quality and sound quality,
components are subject to change without notice.)
(The USB Board for Option-- USD $100.00)
The QA890 remote
control for option(USD $20.00) :
following items are included with your Order: QA890 DAC *1
Power Cable *1 User Guide
Remote Control * 1 (Option)
USB Cable *1 [Option,
Only for With USB]
time of purchase, please indicate the following: Your couftry's voltage specs.
Payment methods 1: Direct remittance to PAYPAL ,
Our paypal account: firstname.lastname@example.org
We will send good by DHL/TNT/EMS Expres, and we will declare the
sending for gift with a low value(For example: USD $100.00), to reduction reciever
side to pay tax or try to avoid reciever side to pay tax.
If the list have not
include your country,
Please contact us for get your shipping by E-mail.
Payment methods 2: You alse can pay to our bank accout:
of China Account:
4766938-0188-129144-0 IN A/C WITH:
BENE‘S BANK: BANK OF CHINA SHENZHEN
BEI FANG BUILDING SUB-BRANCH
SWIFT CODE: BKCHCNBJ45A
1/F,BEI FANG BUILDING,SHEN NAN ZHONG ROAD,SHENZHEN,CHINA
Tip: The beneficiary name should be TANG YAN ,
Not is QLS Electronics.
Payment Method 3:
You can select the nearest agency for westernunion, you only
need my name, city and country to send money. They accept
cash and online payment .After you send it, the workers of
westernunion will give you a control number, i need this
control number and your full name to draw money.
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please click Find An Agent .
Here is my westernunion info: Firstname: Yan Familyname: Tang Address: A4-1-3B,Qianlong Xinmao
Garden,Longhua,ShenZhen,Guangdong,China City: ShenZhen State: Guangdong Country: China
After payment,please e-mail us The Sender's First Name, Last
Name, Total Amount, Money Control Transfer Number and
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Also Please tell to us the your recipient name、
recipient address、zip Code、 contact phone number.