QLS Audio, HI-FI/HI-END Audio,DAC,WAV Player




QA-550--SD Card WAV Digital Audio Player

QA-550 H-WD Playe--SD Card WAV Digital Audio Player  H-WD Player=Hi-Fi WAV Digital Player

Price: USD $114.99
(in Stock)
(Exclude shipping cost)

Shipping to Worldwide by
Post International Mail Parcels --- USD $20.00 

How buy it: Click here

Warranty: Click here



QA550 is designed to replace the CD transport of your HiFi system. This digital music player just simply streams the music WAV files in the most popular 16bit/44.1KHz format on the SD card to the digital outputs with high accuracy and low jitters.

The simple the best and sound quality is the most important thing for a true HiFi system.

SD Card is the most popular media card in the market, and most CDs carry 16bit/44.1KHz WAV files. You are free of worrying about any mechanic problem on the CD player and wearing out of CDs once you put 16bit/44.1KHz WAV files on SD Cards. We choose this combination to keep things simple so we can focus on the sound quality.

We developed a single threaded real time program running on a PIC 16bit MCU without any interrupt to steam the music files, other control functions are carried by another separated microprocessor. It achieved extremely high accuracy on the time sequence when streaming music files from the SD card. Moreover a special customized 11.2896 TCXO with jitter lower than 10PS is used as the main sampling clock.Thus the whole system reached our goal on the recovery of musics.

It effectively isolated the serious interference from within the PC/Mac case. e.g. the high frequency data signals, the switching-mode power supply and the FAN motors, etc…

The ideal CD transport is not a CD transport, its one of these WAV SD transports.

Reasons why the QA-550 is better than a traditional CD transport...

  • No moving parts to wear out. Consistant performance every time!
  • Won't suffer from stability issues caused by dust, dirt or smoke
  • No reason to take your valueble CDs out of their cases each time you want to listen
  • WAV files are error corrected so don't need real time error correction unlike CDs
  • Far less jitter than most CD transports / players, even very pricey ones. Sounds better
  • Totally resistant to vibrations. No skipping nor any need to keep on expensive Hi-Fi rack
  • High Accuracy system clock ensures jitter level is miniscule
  • Whole box sets of your favourite CD music collections can be captured in glorious, uncompressed WAV format onto a tiny SD card no bigger than a postage stamp!
  • Can be used to play music for extended periods for equipment "burn ins". No mechanical parts such as lasers or motors to wear out

About WAVs...

WAV files are the favourite format choice of people who can't bear the sonic difficiencies of the lossy compressed MP3 format yet want to store, preserve and playback treasured CD collections from their computer hard disk drives.

Up until now, these people would simply be content to use their computer as their main Hi-Fi source component.

Whilst excellent at converting CDs to WAV files, the PC / Mac is still not the ideal music plackback device. The majority if PCs don't have the best powersupplies and are absolutly packed with noisy, interference inducing components. Multiple noisy fans buzz away constantly and due to components fighting over limited resources, "pops" and stutters on the audio are not uncommon.

In these days of hugely expensive utility bills, the electricity consumed in putting a computer to use for considerable periods just for music playback is also quite considerable as is wear and tear to the hardisks.

Reasons why the QA-550 is a better music transport than a PC...

  • Silent (no moving parts)
  • No pops stutters or audio glitches (assuming that WAVs were extracted with love by EAC)
  • Uses nowhere near the amount of energy that a PC needs
  • Far more compact than even the smallest laptop PC
  • Useful remote control functionality


  • Supports 16bit/44.1KHz WAV files.
  • SD/SDHC up to 32GB FAT32, 90 folders up to 900 music tracks.
  • Firmware upgradeable.
  • Output:
      - RCA Coaxia
      - Optical(TOSLINK)
      - I2S pins available on PCB

  • It also can support play 5.1ch(AC-3 or DTS) *.wav file, and output 5.1ch SPDIF PCM signal, But you need have DAC can support 5.1ch.
  • Power: 9VDC (12VDC battery can be used directly), 150mA, power supply included.
  • Size:
    Case only  8.1cm x 2.4cm x 13.5cm (width x high x deep) 
    Incl. sockets.. 8.1cm x 2.5cm x 15.1cm (width x high x deep)
    Package 13.2cm x 5.5cm x 23.2cm (width x high x deep)
  • Weight:
    Main unit only 230g
    Package 750g  (Include Power supply)
Remote Control for QA-550:
QA-550 H-WD Playe--SD Card WAV Digital Audio Player

QA-550 H-WD Playe--SD Card WAV Digital Audio Player  H-WD Player=Hi-Fi WAV Digital Player

QA-550 H-WD Playe--SD Card WAV Digital Audio Player

he following items are included with your Order:
  QA-550 Player*1
  Remote Control * 1
  8G SD Card * 1
SDHC SD USB 2.0 Memory Card Reader *1 (Card Reader not Warranty)
  Wall Mount DC Power Supply *1
(Input: AC 110V-120V or 220V-240V , Output: DC 9V or 12V)

 User Guide x 1

Price: USD $114.99 (Out of Stock) (Exclude shipping cost)

Shipping to Worldwide by Post International Mail Parcels --- USD $20.00 about 25-30days

If you also need other send methods or you have other any questions, Please contact us:

Your personal account manager is:
Clark chen - cxqmcu@cxqmcu.com    clark_chen@aliyun.com    315392961@qq.com



ADD:Room A1502,NiuLanQian Building,MinZhi Road,LongHua Town,ShenZhen,GuangDong,China
Postalcode: 518131  TEL:0755-28187975    FAX:0755-28187976
E-Mail: cxqmcu@cxqmcu.com