Summary: Type: subwoofer; The number of bands: 1; Power: 400 watts (maximum); Sensitivity: 87 dB; Frequency range: 30 600 Hz; Housing: no; Additional information: Voice coil diameter: 50 mm, 4-Ohm Impedance. The resonance frequency of 40 Hz. The equivalent acoustic volume: 21 HP Weight magnet 1160,; ...