Subwoofer opinion badly needed!

Used may be the way to go for <$500. For used look for a REL, or Vandersteen 2W. Monitor Audio makes a couple inexpensive subs that list for about $700 (ASW110) and $1000 (ASW210) that have gotten decent reviews. B&W ASW 2000 OK for music too.

Try the Hsu Research VTF-2. Several reviewers preferred it for music over *many* other subs. I've had mine for about a year and have been very pleased. You can buy them direct from Mr. Hsu himself; he even gives you a thirty day money-back garauntee.

I think you ll find good bass costs more than 500. Especially for a room your size. You want to shop for a used velodyne. You want minimum 12 inches,downfiring and lots of watts for tight bass. An inexpensive alternative I used in a much smaller room was a Kef 30b. I had it matched with a pair of kef c25s. It was nice and tight for the money.Also PSB made one a few years ago that was much better than the kef. Check their site for model numbers. It should be right in your price range used. steve

It'd be cheaper to build your own with a couple Shiva drivers and you'd actually get real bass.

the hsu tn1220ho can be had for less than $500, but only without an amp. check audioreview.com