Home / Ventura S-218 VENTURA S-218 Specification : Descriptions : Double 18″ Subwoofer Operating Mode : Passive Components : LF 2 x 18inch Frequency response (-3 dB) : 25Hz – 200Hz Nominal Impedance : 4 ohms Sensitivity : 128dBÂ @1W/1m Program RMS : 1600W Peak : 2400W Amplifier Recommendation : 2200 – 3300W continous @ 8ohms Finish : Texture white paint and powder coated grille Dimension : L 68 cm x W 129cm x H 58cm Enclosure : 18mm Multiplex