Helix K 12W 12" Inch 600 Watts MAX Dual 2Ω Ohm Sub SubwooferHelix K 12W 12" Inch 600 Watts MAX Dual 2 Ohm Sub Subwoofer Do it yourselfers, here's your chance to create your personal sub that perfectly fits into your car! From the technical point of view the two drivers K 10W and K12W are absolutely identical with the subwoofers that are installed in the K series enclosure subs. Just have a look at the Thiele Small parameters and you will easily notice that those are designed for compact vented cabinets yet