no one thats not from missouri knows of them, but the won the usa db drags a couple years ago, they are made my competitive audio out of springfield, mo there called rhinos.
http://competitiveaudio.com/Products.../Rhino_new.htm
i have a set, and my 2 12's are WAYYY louder than the 3 cerwin vega strokers i had a couple of years ago.
they have a new sub that will be in production late october that will blow away the jl audio w7's, and there going to have a msrp of 275.00 each, the cool thing is that you buy them directly from the manufacture so there is no middleman like every other company