Summary: Type: subwoofer; Size: 25 cm (10 in.); The number of bands: 1; Power: 250 W (nominal), 500 W (maximum); Sensitivity: 90 dB (2.83 V/m); Frequency range: 35 - 1000 Hz; Impedance: 4 Ohm; Housing: no; Dimensions: 250 mm; Mounting depth: 130 mm; The installation hole: 233 mm; Resonance frequency (Fs): 26 Hz; Full q (Qts): 0.42; Equivalent v ...