Quloos (QLS) QA390

QA390 transportable desktop system

Specifications
• Internal playback storage media: use an external SD card or TF card plus card sleeve in FAT32 format, currently supports a maximum capacity of 512GB

• Internal playback support: 16 - 32Bit, 44.1KHz ~ 352.8KHz, DSD64 ~ DSD128.

• USB interface - USB B port: use the authorized Italian interface Combo 384, support 32Bit / 384KHz PCM and DSD256

• USB interface--Micro port: use SA9227 interface, Apple phone and tablet do not need camera kit, support 32Bit / 384KHz PCM and DSD128

• Bluetooth: Supports Bluetooth 5.0, supports Huawei HD Bluetooth HWA（LHDC) and AAC encoding

• Coaxial input: 75Ω matched impedance, support 24Bit / 192KHz and DSD64(DoP)

• Optical Input: Supports 24Bit / 192KHz and DSD64（DoP)

• Coaxial output: 0.5Vp - p75Ω, support 24Bit / 192KHz and DSD64(DoP)

• Optical output: support 24Bit / 192KHz and DSD64(DoP)

• Analog output:


Frequency response: 20-20KHz

S / N: 122dB

Dynamic range: 121dB

Stereo Crosstalk：120dB

THD+N：0.0005%


Output level:

•RCA (L&R) 2.5V (closed pre-amp)

•XLR (L&R) 5.0V (closed pre-amp)

•SE (Unbalanced)maximum 10.5Vrms(High amp voltage, Ultra high gain, 600Ω load)

•BAL(Balance)Maximum 21Vrms（high amp voltage, ultra high gain, 600Ω load)

• Headphone matching impedance: 8Ω - 600Ω

• DAC: AK4497EQ x 2, LPF: AD797 x 2

• Volume control (including preamp volume control): PGA2311UA

• Reference clock jitter: 0.088 picoseconds (88 femtoseconds)

• Charging port: Available Type-C port, DC port available, QC2.0 quick charge.

• External power supply: DC 5.5*2.1 port, can also be charged (panel switch selection)

• Life time: 8~10 hours (depending on settings, music format, load condition) (measured engineering machine, balance port directly pushes 600 ohm T1, volume 30, digital output off, analog output amp, sound mode descent High gain, high amp voltage, automatic off screen: 30 seconds, 16Bit / 44.1KHz WAV file full card random play, battery life 10 hours and 10 minutes)

• Charging time: Type-C common charge: 8 ~ 9 hours, Type-C fast charge / DC port: 4 ~ 5 hours

• Host & Remote Control Material: All-aluminum CNC integrated milling

• Product weight: 3.0kg in full package, net weight 1.8kg

• Machine size: 20cm x 18cm x 4.45cm, Packing size: 33cm x 27cm x 9cm



Single-ended headphone port rated output power



32Ω 300Ω 600Ω

1000mW / ch 360mW / ch 180mW / ch

High amp voltage and high gain High amp voltage and supper high gain High amp voltage and supper high gain


Balance headphone port rated output power

32Ω 300Ω 600Ω

1300mW / ch 1200mW / ch 720mW / ch

Medium amp voltage and supper high gain High amp voltage and supper high gain High amp voltage and supper high gain