Summary: Type: subwoofer; Size: 23 cm (9 in.); The number of bands: 1; Power: 200 W (nominal), 1000 watts (maximum); Sensitivity: 88 dB (W/m); Frequency range: 25 - 3000 Hz; Impedance: 4 Ohm; Housing: no; Number of speakers: 1; Dimensions: 222 mm; Mounting depth: 71 mm; The installation hole: 192 mm; Resonance frequency (Fs): 44 Hz; Full q (Qts ...