Summary: Type: subwoofer; Size: 38 cm (15 in.); The number of bands: 1; Power: 750 watts (nominal), 2000 watts (maximum); Sensitivity: 87 dB (W/m); Frequency range: 22 - 500 Hz; Impedance: 4 Ohm; Housing: no; Cone material: cellulose is reinforced with Kevlar; Material suspension: Santoprene; Mounting depth: 234 mm; The installation hole: 349 mm ...