Summary: Type: subwoofer; Size: 20 cm (8 in.); The number of bands: 1; Power: 400 W (nominal), 800 watts (maximum); Sensitivity: 84 dB (W/m); Impedance: 2 Ohms; Housing: no; Recommended housing: closed box, vented; Number of speakers: 1; Dimensions: 200 mm; Mounting depth: 67 mm; The installation hole: 177 mm; Type of winding: double; ...