Hifonics ZW12D4 Zeus Vehicle Subwoofer The pressure treated blue foam surround along with the Zeus spider helps keep the piston motion of the subwoofer linear and distortion free. Heavy Duty Thermoformed cone and dust cap adds strength to bass energy and proudly displays the Hifonics logo. Specialized Hifonics cotton spider, along with the surround, allows the Zeus woofer to handle more power with minimum distortions. Unique Hifonics design Back Venting allows more heat to be exchanged with cool air allowing more power handling and increased reliability. 12" DVC 4 Ohm subwoofer 300 watts RMS 600 watts MAXX