Summary: Type: component speakers; Size: 13 cm (5 in.); The number of bands: 2; Power: 50 W (nominal), 150 W (maximum); Sensitivity: 91 dB; Frequency range: 57 21,000 Hz; Impedance: 4 Ohm; External crossover: yes; Resonance frequency (Fs): 67 Hz; Full q (Qts): 0.57; ...