GoldenEar SuperSub X SubwooferLike the SuperSub XXL, the ultra compact SuperSub X (just a little bigger than a 12 1 2 cube) utilizes the same dual plane, patented* inertially balanced driver array, but instead employs two horizontally opposed 8 ultra long throw active drivers and two vertically opposed 10 1 2 x 9 1 2 planar back wave driven radiators, driven by a 1400 watt Class D Digital amplifier. Simply unbelievable raved the press about its stunning output after their first