Summary: Type: subwoofer; Size: 30 cm (12 in.); The number of bands: 1; Power: 500 W (nominal), 1500 watts (maximum); Sensitivity: 91 dB; Frequency range: 20 Hz to 500 Hz; Impedance: 4 Ohm; Built-in amplifier: no; Housing: yes; Enclosure type: with passive radiator; Number of speakers: 1; Dimensions: 300 mm; Type of winding: double; ...