Summary: Type: subwoofer; Size: 30 cm (12 in.); The number of bands: 1; Power: 450 W (nominal), 900 watts (maximum); Sensitivity: 84 dB (W/m); Impedance: 4 Ohm; Housing: no; Recommended housing: closed box, vented; Number of speakers: 1; Dimensions: 305 mm; Cone material: polypropylene; Material suspension: rubber; Mounting depth: 154 mm; The i ...