JL Audio 12W0v3-4 12" W0v3-Series 4-Ohm Car Subwoofer
After owning 3 8&#34; JL W1 for 11 years I accidently tried to get another brand in size 12.  It played nice, but this JL 12 W0 knocks I have a mono alpine 500 in a sealed box.  Believe the reviews this sub rocks.  Delivered in about 4 - 5 business day as promised from coast to coast.