I would switch boxes. A sealed box will have a tighter sound, and better response, but won't hit quite as hard. Here's a comparison for 2 10's that I have.

Sealed Box


Bandpass Box
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My Xterra Pics
I wish I would have a real tragic love affair and get so bummed out that I'd just quit my job and become a bum for a few years, because I was thinking about doing that anyway.