Sub for MA Silver S1

Do you have a budget? Music, movies or both?

I believe that MA makes subs. One of their models should blend nicely.

I have a room about the size of yours and I run a little REL T3. It does nicely for music, but doesn't quite get it for movies. You might also want to check out the SVS subs. I've had my eye on a sealed model for music only.

SVS makes great subs. They have a 45 day return policy with free shipping.