I have a buddy that is a certified installer and he swears by JL Audio. He knows his sh*t. He also likes kicker. I have a 12'' square L7 kicker in my car. It's a 1000 watt sub. I also have a 1000 watt memphis amp pushin the sub. It's so loud it feels like it's breathin for you. I usually only run it with the amp half way up. I heard somewhere the guy with the loudest single sub has a kicker L7. I love it! One of those two for sure.