Unless you're using the basic Eminence drivers or a few select other eminence motors, you're asking for trouble.These are P.A. woofers designed with generally high FS values and lower Q values. Very bad for sealed box operation. The enclosures will be very small, but extremely shallow on the bass and simply won't sound right. A few Eminence woofers (Kappa 18A, Kilomax) would work okay in a sealed box, but they don't have the xmax for high volumes.
Adam