Rockford Fosgate Prime Series R1S4-12 - 12" 4-Ohm Subwoofer 400 Watts
Best of all, they work great in sealed enclosures. (2.80 Liters). Power Handling (Watts RMS) -200 Watts RMS. -400 Watts Max. SPL (dB @ 1w/1m): 90. Magnet Weight (oz): 40 oz. (1.13 Kg.).