Specifications: 
Digital inputs: optical, coaxial RCA x 2, analog input, and optional XMOS digital interface module to include an USB input. Format support: 16Bit-24Bit, 32-192KHz PCM signals and DSD64 DoP signal (bit rate, median adaptive). 
Input switching mode: panel buttons or remote control (digital display input channels, automatically saved). 
Volume Control: panel encoder or remote control to adjust volume, digital display current volume of 0-80, the remote control can be adjusted about the sound volume 5, it is automatically saved. 
High frequency compensation: available for speaker frequency response inherent defect, using the remote control to fine-tune the high-frequency and low-frequency compensation (default is not compensated). 
Input voltage: AC 90V-130V / 180V-250V (machine left switch). 
Load Impedance: 2-16 ohms. 
Output Power: 4 Ohms: 2 x 160W, 8 Ohm: 2 x 100W. 
distortion: <0.02% (- 2.5dBFS, 8 ohms). 
dynamic: 101dB (A-weighted) 
signal to noise ratio: 101dB (A-weighted) 
separated degree: 97dB
Frequency response: 10Hz-20KHz (8 ohms). 
Standby power consumption: <13W. 
Machine size: (L) 300mm x (W) 216mm x (H) 100mm; length without output interface and knobs. 
Machine weight: 5KG. 

Package:
QA690 *1
Remote control *1
User mannual *1
Coaxial cable *1
Power cable *1
USB cable *1(If you order the USB version.)