Configuration: 2-way Active speaker system Freq Response(-10dB): 40-20 KHz Sensitivity (1W@1m): 98dB Nominal Impedance: 4 ohms Amplifier: LF 180 Watts HF 40 Watts dispersion(HXV): 90°X45° Crossover Freq: 2.5 KHz Low Frequency: 15" Woofer High Frequency: 1.35" titanium diaphragm compression driver Input Connector: USB MP3 Player/MIC/RCA Dimension(WxDxH): 555 X 485 X 820mm