Out Of Stock QLS QA350 MOD V2 - QA350V2

QLS QA350 MOD V2 WAV Hi-Fi Music Player+4GB SD Card


QA350 MOD V2 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 MOD V2 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 16-300Ω headsets. QA350 MOD V2 is new mod version of QA350, It upgraded the headphone amp chip MAX9722A to AD8397 chip, It sounds damn good. It has the capability to drive any headphones available in the high-end with ease.

QA350 MOD V2 has a very large output power:
QA350 Output Power: 70mW/16Ω;     130mW/32Ω;    26mW/150Ω;    13mW/300Ω;
QA350 MOD V2 Output Power:   500mW/16Ω;   250mW/32Ω;    97mW/150Ω;    49mW/300Ω;

  • Use 2PPM  11.2896 TCXO  Crystal (crystal JITTER is below 10PS)
  • The power supply part use several LDO, respectively offer power for: crystal oscillator, the main chip, the digital output chip, DAC digital, DAC analog, headphone amplifier, display control, to ensure the best sound quality.
  • In portable system, fever grade materials are applied: Kemet tantalum capacitors, YAGEO SMD 1% precision resistors, high precision SMD capacitor of Samsung, ELNA electrolytic capacitors, ALPS potentiometer.
  • Lithium polymer battery of general specifications applied in the aircraft models serves for power supply. The benefits are:
  • 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.
  • 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).
  • 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.
  • Provide a professional balance charger for models for the rechargeable lithium balance charge, which reduces the charging time, and expands long battery life.
  • Onboard short-circuits protection and over-discharge protection ensures the battery life.
  • 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.
  • LDO filter circuit strictly matches ESR to ensure minimum ripple output.
  • Firmware can be upgraded, and the upgrade is simple.
  • 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.
  • 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).


  • In portable system, fever grade materials are applied: Kemet tantalum capacitors, YAGEO SMD 1% precision resistors, high precision SMD capacitor of Samsung, ELNA electrolytic capacitors, ALPS potentiometer.
  • Play format: 16bit 44.1K WAV (the same with CD ripping and file format).
  • Storage method: SD 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.
  • Digital output chip: CS8406.
  • DAC Chip: Wolfson WM8740.
  • LVP: AD8656.
  • Headphone Amp chip: MAX9722A.
  • Digital Output: Coaxial (RCA), Fiber Optical (round).
  • Analog Output: LINE OUT, headphone AMP output.
  • LINE OUT parameters: level 2V (RMS); frequency response 20hz-20Khz. SNR> 100dB; Distortion <0.005%.
  • Headphone amp out parameters: 130mW/32ohm.70mW/16ohm. Frequency response: 20 Hz-20Khz. THD + N (total harmonic distortion plus noise): 0.009%.
  • Headphone output matching impedance: 16 ohm --- 300 ohm
  • Battery Type: 7.4V Li-Po battery of Model General Specifications, maximum size: 55mm * 31mm * 16mm; the capacity is usually among 800-1100mAH.
  • Battery life: 6 to 8 hours.
  • Charging time: 1.5-3 hours (when charging, playing music can available powered by the external power supply)
  • Power consumption: 120mA-150mA (LCD backlight does not open) or 150-180mA (open LCD  backlight)
  • Specifications of matching charger: Support  2 cells Li-Po batterys balance charger.
  • Supply Voltage: 110-240V AC.
  • Maximum charge current: 800mA. Display: double-color LED instructions of charging charge status.
  • Dimension: 135mm * 78mm * 27mm (excluding the output socket, switch, button, etc.)
  • 150mm * 78mm * 30mm (with all the sockets, VR button, switch, button)
  • Package size: 235mm * 135mm * 55mm
  • Single Weight (with battery): 0.3kg
  •  Packing Weight: 0.75kg


  • QA350 MOD V2 Player(Inside is include a 7.4V Li-Po battery)
  • Remote Control
  • 4GB SD Card
  • SDHC SD USB 2.0 Memory Card Reader              
  • 1 Wall Mount DC Power Supply (AC 100V-240V )
  • Balance charger
  • 3 pin changing cable
  • Manual

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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 11253
  • Brand: QLS
  • Product Code: QA350V2
  • Availability: Out Of Stock
  • $249.00

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Tags: QLS QA350 MOD V2, QLS QA350 MOD V2 WAV Hi-Fi Music Player+4GB SD Card Description QA350 MOD V2 is a WAV high fidelity music player designed and made by QLS Electr, QA350V2