Even though i havent posted anything on here about it, i read everything on here for building the sub. Thanks everyone. I have a tempest in a 214L ported box tuned to 15.4hz. It goes low. Sounds awesome. Its powered off an old akai aa-1200 receiver. Awesome receiver. The receiver probably weighs a good 50lbs and i made it dance across the box. I even made the water go nuts in the fish tank. Thanks for all the threads you guys made on here. Helped me a lot.