DS18 Pair of High Excursion 6.5" Car Audio Subwoofer 600W Peak 4 Ohm DVC ZXI6.4D | eBay
Bluave M10S22 10" M Series High Power 600w Marine Subwoofer 2-Ohm with 10" Universal Marine Sub Box Enclosure for Cars, Trucks, Powersports, UTVs, Golf Carts, Boats - Creative Audio