From my experience with the prolinear, it's a movie sub before music. Its a little boomy, but that could be placement. Its my bro's theater, so I don't touch it much, he has his "own" way of doing things. The box for the basscube is very dense(typo?). A good knock and there is no resonance.
You, my friend, have balls, very big ones to be opening up speakers and what not. I installed a new heatsink on my graphics car and nearly puked I was so nervous. I had my computer savy friend on the phone guiding me, probably with his eye's closed
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sheep