Dam that's sick.. I love these sa 8's in the right enclosure they will blow your mind. The guy that built mine calls it hybertune huts notes from 70 to 25htz sounds good with all music types and incredible lows
http://i1338.photobucket.com/albums/o699/rich3212/IMG_0318_zps063a4775.jpg
http://i1338.photobucket.com/albums/o699/rich3212/IMG_0317_zps1600a6c3.jpg
These are the subs I am running