Resonant Engineering SX 12. It's dual 2 ohm. Used for about a year and a half at low volume. I have a custom made box made to fit in a Impreza wagon with enough space for a set of golf clubs remaining. The box is 3/4 inch mdf, 2 cf tuned to 32 hertz, 4 bar grill and covered with some fake suede stuff. $175 without box $200 with box
