Quloos QA390 Limited version 2021 HiFi Bluetooth 5.0 Headphone Amplifier AK4497EQ*2 Decoding Audio Decoder Lossless Music Player AMP

QULOOS QLS QA390 Limited version 2021 ES9038 PRO HiFi Lossless Music Player DAC Decoder Headphone Amplifier

Descriptions:
● Internal playback storage: one external SD card or TF card with card cover, in FAT32 format, the upper limit is 512GB.
● The supported code rate: 16- 32Bit, 44.1KHz ~ 352.8KHz, DSD64 ~ DSD128.
●USB interface-USB B port: Adopting authorized Italian interface Combo 384 and optimize hardware design, supports 32Bit/384KHz PCM and DSD256.
●USB interface -Micro port: Using SA9227 interface, iOs phones and PC do not need camera kits, with 32Bit/384KHz PCM and DSD128.
● Bluetooth: Bluetooth 5.0, supports AAC and SBC.
● Coaxial input: 75Ω matched impedance, supporting 24Bit/ 192KHz and DSD64 (DoP).
● Optical input: supports 24Bit/ 192KHz and DSD64 (DoP).
● Coaxial output: 0.5Vp- p75Ω, supports 24Bit/ 192KHz and DSD64 (DoP).
● Optical output: supports 24Bit/ 192KHz and DSD64 (DoP).

Analog output parameters:
Frequency response: 20-20KHz.
SNR: 122dB.
Dynamic range: 121dB.
Separation degree: 120dB.
Distortion: 0.0005%.

Low output level:
RCA (L&R) 2.5V (preamp closed).
XLR (L&R) 5.0V ((preamp closed)
SE (unbalanced) Max 10.5Vrms (high voltage in amp, ultra-high gain, 600Ω load).
BAL (balanced) Max 21Vrms (high voltage in amp, ultra-high gain, 600Ω load).

●The supported impedance of headphones: 80-600Ω.
● Decoding chip: ES9038PROx 1.
● Volume control (including preamp volume control): PGA2311UA analog program-controlled.
● Reference clock jitter: 0.038 picoseconds (38 femtoseconds).
● Charging interface: Type-C port or DC port, which supports fast charging and is compatible with QC standards.
● External power supply: DC 5.5*2.1 port, which can also be charged at the same time (panel switch).
● Battery life: about 8.5 hours (depending on setting, music format and load).
● Charging time: Type-C standard: 8~ 9 hours, Type-C fast charging /DC port: 4~ 5 hours.
● The Material of unit & remote control: Aluminum CNC
● Product weight: 3.1kg (Included the package)
● Size: 20cm X 18cmx4.45cm, 
    package size: 33cm X 27cm x 9cm


Package:
1. QA390 limited version *1
2. SanDisk 64GB TF card with card set) *1
3. USB3.0 card readers *1
4. USBAD to port B cable *1
5. TYPE-C charging cable *1
6. External power supply (charging) *1
7. Infrared remote controller *1

Single-ended headphone port rated output power:
32Ω, 1000mW/ch high voltage, high gain
300Ω, 360mw/ch  high voltage, super high gain
600Ω, 180mW/ch high voltage, super high gain

Balance the headphone port rated output power:
32Ω, 1300mW/ch voltage, high gain
300Ω, 1200mW/ch high voltage, super high gain
600Ω, 720mW/ch high voltage, super high gain

Quloos QA390 HiFi Bluetooth 5.0 Headphone Amplifier AK4497EQ*2 Decoding Audio Decoder Lossless Music Player AMP

Features:
1. Powered by a large-capacity battery, the internal current and voltage are designed according to the standards of high-end desktops. It is a truly removable decoding amp machine.
2. Dual 1000000uF low internal resistance super capacitor for digital and analog partial isolation power supply, similar to the dual-booster design of desktop machines.
3. Balanced amp can output more than 20V voltage, easily push high-impedance headphones.
4. The final stage power tube current output capability is 2700mA, which is very good for driving low resistance and low sensitivity headphones.
5. DAC chip adopts AK4497EQ*2 and supports ALL To DSD.
6. Two femtosecond crystal designs, high-speed precision-controlled CPLD clock processing, and global clock unified and synchronous operation mode.
7. Built-in single-chip single-threaded SD card pure tone player.
8.HWA (LHDC) HD Bluetooth input for easy connection to mobile phones.
9. Two-way USB interface, one for the phone or tablet (no camera kit required), and the other for an authorized Italian interface.
10. Four 3300mAH 18650 batteries provide a total battery capacity of 31200mAH.
11. More than 30 ultra-low noise power chips provide clean power for each circuit device.
12. Headphone interface is complete, single-ended interface: 3.5, 6.35; balanced interface: 2.5, 3.5, 4.4, XLR.

Specifications:

Internal playback storage media: use an external SD card or TF card plus card sleeve, FAT32 format, currently supports a maximum capacity of 512GB
Internal playback support code rate: 16-32Bit, 44.1KHZ-352.8KHZ, DSD64-DSD128
USB interface - USB B port: use authorized Italian interface Combo384, and optimize hardware design, support 32Bit/384KHz4 PCM and DSD256
USB interface -- Micro port: use SA9227 interface, Apple phone and tablet do not need camera kit, support 32Bit/384 KHz PCM and DSD128
Bluetooth Receive: Support Bluetooth 5.0, support HD Bluetooth HWA (LHDC) and AAC encoding.
Coaxial input: 75Ω matched impedance, support 24Bit/192KHz and DSD64 (DoP)
Fiber input: support 24Bit/192KHz and DSD64 (DoP)
Coaxial output: 0.5Vp-p75Ω, support 24Bit/192KHz and DSD64 (DoP)
Fiber output: support 24Bit/192KHz and DSD64 (DoP)

Analog output parameters:
Frequency response: 20-20KHz
Signal to noise ratio: 122dB
Dynamic range: 121dB
Resolution: 120dB
Distortion: 0.0005%

Output level:
RCA (L&R) 2.5V (closed pre-level)
XLR (L&R) 5.0V (closed pre-level)
SE (unbalanced) maximum 10.5Vms (high amp voltage, ultra high gain, 600Ω load)
BAl (balance) up to 21Vms (high amp voltage: ultra high gain, 600Ω load)

Amp output impedance: unbalanced: 0.13Ω; balance: 0.2Ω
Headphone matching impedance: 8Ω-600Ω
Decoding chip: Ak4497EQ*2 LPF: AD797x2
Volume control (including preamp volume control): PGA2311UA analog program control volume
Reference clock jitter: 0.088 picoseconds (88 femtoseconds)
Charging interface: Available Type-C port, DC port available, fast charging, QC compatible
External power supply: DC5.5*2.1 port, can also be charged (panel switch selection)
Life time: 8 to 10 hours
Charging time: Type-C general charge: 8 to 9 hours, Type-C fast charge / DC port: 4 to 5 hours
Host & Remote Control Material: All Aluminum CNC Integrated Finishing
Product weight: 3.0kg in full package, net weight 1.8kg
Host size: 20cm*18cm*4.45cm
Packing size: 33cmx27cmx9cm

Single-ended headphone port rated output power:

32Ω, 1000mW/ch amp high voltage, high gain
300Ω, 360mw/ch amp high voltage, super high gain
600Ω, 180mW/ch amp high voltage, super high gain

Balance the headphone port rated output power:
32Ω, 1300mW/ch amp voltage,high gain in
300Ω, 1200mW/ch amp high voltage, super high gain
600Ω, 720mW/ch amp high voltage, super high gain

Product List:

QA390 player*1
SD 64GB TF (matching card set) is not lower than red gold level *1
USB3.0 card reader*1
USB A port to B port USB cable*1(Note: The USB cable connected to the phone is not included.)
TYPE-C charging cable*1
External power supply (and charging)*1
Remote control*1