... to 15 pcs integrated drivers 2,Real 5.1 3D surround sound 3, Bluetooth funciton 4, USB/SD card input 5 ... +1")x2(front)+3"x2+1(center)+(3"x2)x2(surround) •frequency response : 85Hz-20Khz •THD(1Khz,1W): <0.1% •rated ... -fidelity audio system. Our main products include: Home theater system, amplifier, passive/active speakers, commercial audio system and so on. we ...