Quick question for all of you experts.... I am itching to try to build a subwoofer from the ground up and would like to build a sandbox lined sub using the SA-1 amp paired with one of the mfw-15 drivers in a sealed box.  Currently, I have a mfw15 hooked up.  Obviously, it is a ported sub.  Would it be possible to use both subs in my home theater system together?  Would the combination of a sealed sub and a ported sub sound like crap?  Thanks for your advise.  Tom