Oh.. Sorry.. We were thinking of just getting one of the dual 10 enclosures from Woofers. One has 3/4 MDF the other has 11/16s. We can always build a box later. I think he likes the idea of having 2 subs. Would the Cadence amp be enough for two 10s? or would it be best with 2 8s, or one 12? Thanks. Either this: http://www.woofersetc.com/p-3524-sqp210-ground-shaker-10-dual-ported-box.aspx or this: http://www.woofersetc.com/p-3523-sq210-ground-shaker-10-dual-sealed-box.aspx