Here are the specs of the sub I was looking at.
Rockville RMW8P 8" 800 Watt Car Subwoofer + Tunnel Slot Ported Sub Enclosure Box
8” High power long excursion tuned subwoofer
CEA Power Rated 200 Watts / 400 Watts RMS / 800 Watts Peak
1.5” high temperature 4 layer Kapton voice coil
70 oz magnet...