Summary: Type: subwoofer; Size: 38 cm (15 in.); The number of bands: 1; Power: 500 W (nominal), 1000 watts (maximum); Sensitivity: 98 dB; Impedance: 4 Ohm; Housing: no; Recommended housing: closed box, vented; Number of speakers: 1; Dimensions: 381 mm; Basket: stamped; Material basket: steel; Resonance frequency (Fs): 27 Hz; Type of winding: d ...