Keep on question for the true sound

Specifications

BPA-640

Frequency Response : 20Hz  -  20kHz
Total harmonic Distortion : 0.15% (max)
Power Voltage : 220V ～ 240V/50Hz
Dimensions : 482 X 88 X 405 mm
Output
MAIN OUT (A/B) : 600W+600W/8Ω
MAIN OUT (A/B) : 900W+900W/4Ω
MAIN OUT (C/D) : 400W+400W/8Ω
MAIN OUT (C/D) : 600W+600W/4Ω
Power consumption : 2800 W