Summary: Type: subwoofer; The number of bands: 1; Power: 400 watts (maximum); Sensitivity: 92 dB; Frequency range: 20 - 200 Hz; Housing: no; Additional information: Woofer size 300 (12") mm 4-Ohm Impedance. Qts, electro-mechanical quality factor of 0.35. Vas, equivalent air volume 130 HP Fs own resonant frequency of 30 Hz. Woofer material polypropyle ...