Configuration; 2-way Active speaker system Freq Response(-10dB); 42-20KHz Sensitivity (1W@1m); 98dB Nominal Impedance; 4 ohms Amplifier; LF 180 Watts HF 30 Watts dispersion(HXV); 90°X45° Crossover Freq; 3.5KHz Low Frequency; 15" Woofer High Frequency; 1.35" titanium diaphragm compression driver Input Connector; USB MP3 Player/MIC/RCA Casing Dimension(WXDXH); USB MP3 Player/MIC/RCA