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QA350 SD Card WAV High Fidelity Music Player

   QA350 is a WAV high fidelity music player designed and made by QLS Electronics. SD card is applied as storage medium while lossless WAV format as the sound source. The player integrates DAC and headphone Amplifier circuit with the built-in high-capacity rechargeable lithium polymer battery. It is convenient to carry with and play music.
   QA350 retains the optical and coaxial digital output of QA-550, while increases the analog (LINE OUT) output (which can be directly connected to your amplifier or pre-level) and the amp output, which can drive the majority of 16-300¦¸ headsets.
   More professional components, more rigorous screening mechanism of components, more stringent design layout, more rigorous testing and debugging are applied in QA350. Users are allowed to fully experience an unparalleled listening enjoyment brought about by the player.

  ¡ó Use 2PPM 11.2896 TCXO Crystal (crystal JITTER is below 10PS)
  ¡ó The power supply part use several LDO, respectively offer power for£º crystal oscillator, the main chip, the digital output chip, DAC digital, DAC analog, headphone amplifier, display control, to ensure the best sound quality.
  ¡ó In portable system, fever grade materials are applied£º Kemet tantalum capacitors, YAGEO SMD 1% precision resistors, high precision SMD capacitor of Samsung, ELNA electrolytic capacitors, ALPS potentiometer.
  ¡ó Lithium polymer battery of general specifications applied in the aircraft models serves for power supply. The benefits are£º
Discharge in large rate and low internal resistance. Discharge current can reach couples of Ampere in a blink to increase the low frequency and transient explosive power of portable system.
  ¡ó Lithium polymer batteries applied in the aircraft models have common specifications and are easy to buy which facilitate users to replace batteries by themselves. (Batteries have certain usage life. Customized size / appearance bring great inconvenience to users for the subsequent replacement of the battery.) (Maximum supports of 55mm * 31mm * 16mm 7.4V lithium battery for model aircraft are available).
  ¡ó Model aircraft batteries commonly use high-quality battery cells and have enough stock and market verification for long time with stable performance and long service life.
  ¡ó Provide a professional balance charger for models for the rechargeable lithium balance charge, which reduces the charging time, and expands long battery life.
  ¡ó Onboard short-circuits protection and over-discharge protection ensures the battery life.
  ¡ó QA350 directly applies 7.4V lithium battery. we spent a lot of time selecting high-end chip OPA and the OPA with good performance under low voltage. The whole player has no step-up circuit and reverse voltage circuit. The sound is transparent and pure.
  ¡ó LDO filter circuit strictly matches ESR to ensure minimum ripple output.
  ¡ó Firmware can be upgraded, and the upgrade is simple.
  ¡ó Provide external power input interface, and the input voltage is DC9V-DC12V. When external power is input, the internal power supply will be automatically disconnected.
  ¡ó When the internal battery is charging, external power supply is available. (We are not recommended to use battery offer power supply When the charging internal battery, which have significant impact on battery life).

Product specifications Indicators£º
  ¡ó Play format£º16bit 44.1K WAV (the same with CD ripping and file format).
  ¡ó Storage method£ºSD card storage media is applied for audio playback, FAT32 format less than (equal to) 16G, SD/SDHC), SD card support hot swap.
      Support maximum 55 folders with the maximum of 550 songs; the remote control can directly select the folder or directly input the track number. The operation is very convenient.
  ¡ó Digital output chip£ºCS8406.
  ¡ó DAC Chip£ºWolfson WM8740.
  ¡ó LVP£ºAD8656.
  ¡ó Headphone Amp chip£ºMAX9722A.
  ¡ó Digital Output£ºCoaxial (RCA), Fiber Optical (round).
  ¡ó Analog Output£ºLINE OUT, headphone AMP output.
  ¡ó LINE OUT parameters£ºLevel 2V (RMS); frequency response 20hz-20Khz. SNR> 100dB; Distortion <0.005%.
  ¡ó Headphone amp out parameters£º130mW/32ohm.70mW/16ohm. Frequency response£º 20 Hz-20Khz. THD + N (total harmonic distortion plus noise)£º 0.009%.
  ¡ó Headphone output matching impedance£º16 ohm --- 300 ohm
  ¡ó Battery Type£º7.4V Li-Po battery of Model General Specifications, maximum size£º 55mm * 31mm * 16mm; the capacity is usually among 800-1100mAH.
  ¡ó Battery life£º6 to 8 hours.
  ¡ó Charging time£º1.5-3 hours (when charging, playing music can available powered by the external power supply)
  ¡ó Power consumption£º120mA-150mA (LCD backlight does not open) or 150-180mA (open LCD backlight)
  ¡ó Specifications of matching charger£ºSupport 2 cells Li-Po batterys balance charger.
  ¡ó Supply Voltage£º110-240V AC.
  ¡ó Maximum charge current£º800mA. Display£º double-color LED instructions of charging charge status.
  ¡ó Dimension£º135mm * 78mm * 27mm (excluding the output socket, switch, button, etc.)
                  150mm * 78mm * 30mm (with all the sockets, VR button, switch, button)
  ¡ó Package size£º235mm * 135mm * 55mm
  ¡ó Single Weight (with battery)£º0.3kg
  ¡ó Packing Weight£º0.75kg

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-350 is a better music transport than a PC...
Silent (no moving parts)
   Powered by dedicated 9v dc linear power supply or battery. Helps reduce jitter
   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


Internal PCB board£º
(In order to improve the quality and sound quality, components are subject to change without notice.)


The following items are included with your Order£º
   1. QA350 Player * 1pcs 
(Inside is include a 7.4V Li-Po battery)
   2. Remote Control * 1pcs
Free!!! 2G SD Card * 1pcs
Free!!! SDHC SD USB 2.0 Memory Card Reader * 1pcs  (Card Reader not Warranty)
   5. Wall Mount DC Power Supply * 1pcs 
(Input£º AC 110V-120V or 220V-240V , Output£º DC 9V 500mA Linear Power supply)
   6. Balance charger * 1pcs
   7. 3pin changing cable * 1pcs
   8. User Guide * 1pcs 

Price: US $184.99
Purchasing Instructions£º
   At the time of purchase, please indicate the following£º
   Contact telephone number for shipping purposes.
   Your couftry's voltagd specs£º110V (US, Canada, etc), 220V (Europe, Asia, etc).

Payment methods 1: Direct remittance to PAYPAL

QA350 Player+ Shipping to Worldwide by Registered Air Mail US $204.99    £¨About 15-25days£©

QA350 Player+ Shipping to Worldwide by EMS Express US $219.99     £¨About 5-7days£©


  2G SD Card US $10.00

  8G SD Card US $24.00

  16G SD Card US $36.00

Procurement Description:
  Thank you for your order, please purchase product, tell us through the following E-mail:
  Your address, telephone number, contact person,
  My E-mail: qls@cxqmcu.com

Payment methods 2: My ebay shop --- http://stores.ebay.com/QLS-MCU-Development-TooL-Audio-DAC?_rdc=1

Payment methods 3:  BANK OF CHINA International Business:
  Remittance form:Remittance to our BANK OF CHINA account use U.S.dollars through local banks.
  Remittances cost:General remittances will be fixed at 25 dollars deducted, the total amount of remittances:The total amount of products + Shipping+ USD $25.00.
  The message witch provide to the local bank's:(To avoid making mistakes,You can put the following message to the bank staff,and ask he fill the forms for you )
  A/C NO£º4766938-0188-129144-0
  POST CODE£º518033


Hi, if we buy now, when you shipped to me ?

  1¡¢When we received you payment, we will sent the items to you within 1-2 work days !

You sent the items to me ,you have the tracking number for me ?

  1¡¢If Shipping by Registered Air Mail, We will send you by Registered Air mail, This is have tracking number, and it can takes 7-20 working days.
  2¡¢If Shipping by DHL/UPS/TNT/FedEx Express, We will send you by DHL/UPS/FedEX/TNT/EMS..Express, This is have provide Tracking number! and it can takes 3-7 working days !

If the item in the swap in the transport stolen, and you will be re-distributed to us?

  1¡¢If you buy the parts, within the prescribed time did not receive goods, we will re-sent to you.
  2¡¢For example, if shipping by Air Mail or Registered Air Mail, if you buy the parts on jaunary 1, you will received the parts on Jaunary 30 before, becuase it takes 7-20 working days, if you not received the parts on Jaunary 30 before, please tell me we, we will re-sent to you!
  3¡¢For example, if shipping by DHL/UPS/FedEX/TNT/EMS..Express, if you buy the parts on jaunary 1, you will received the parts on Jaunary 15 before, becuase it takes 3-7 working days, if you not received the parts on Jaunary 15 before, please tell me we, we will re-sent to you!
  4¡¢We WON'T resend any bounce back order due to incorrect shipping address

Payment Method£º

   1¡¢Accept paypal   --  Credit card through Paypal
   2¡¢Accept Pay to bank of chian
   3¡¢Accept wester union
       I will ship to the shown address on you PAYPAL Payment notice.
       Please confirm your shipping address in the PayPal Account
       or Please tell me your shipping address by Email,
       Please tell me you phone number
       Buyers need to absorb ALL re-shipments fee of returned packages

Return Policy£º

  1¡¢100% money back guarantee or exchange the same class of the products.
  2¡¢Full refund will be issued upon receipt of the Deffective Item.
  3¡¢Please be advised that shipping and handling cost are not refundable.
  4¡¢Buyers must be returned the defective products within 7 days from the date when product received.
  5¡¢Refund or Replacement will be sent after we received your returning item.
  6¡¢In all cases, buyers pay shipping at their own cost to return products for exchange or refund.

Shipping Schedule£º

  1¡¢Normally, Your order will be shipped within 1-2 our business days after the payment is cleared.
  2¡¢The shipping time may vary, depends on receiver's location.

Item Declare£º

  1¡¢Your item will mark as Gift or Sample and a low's value.
  2¡¢We are NOT responsible for any import tax, customs fees or customs delay.
  3¡¢Buyer cannot request to cancel the auction or request for refund under this situation. Please check with your local tax authorities BEFORE bidding.
  4¡¢However, most of our items can reach to buyers without any taxes.

Shen Zhen QLS Elecrtonic TECHNOLOGY CO.,LTD.
£ºHuiningge 13G,QianLong garden,Longhua,ShenZhen,GuangDong P.R.China.
Postalcode£º 518131  TEL£º+86-0755-28187975-602    FAX£º +86-0755-28187976