I have a single SQ-10 in a box I made like the one in the first posts. It adds some nice bass, but I will be building a new box for dual 10's shortly. A single 10 just isn't quite enough for me. I don't need anything crazy like Ben's setup, just something to let me feel the music a little bit. I love my SQ-10.

 

agreed.

 

I wouldn't say it shakes the car next to me, although it might if I turn it up enough, but it definitely bumps enough for me in the car