Originally Posted by rhodesrt
I am open to any other options and thanks in advance for any advice!
Also, I just found a on craigslist for $200 as well. Not sure about buying a used sub but I've heard good things about Velodyne.
BTW, the room it is going in is 20x14x8' ceilings.
Based on your above, first and foremost, all our gear is used so when one thinks about buying used, they need to take into consideration, how they, their family and friends use their "stuff." This should give you and idea of if buying used is a good idea or not.
Velodyne 3750r ??? Is woefully to small for a room your size, that's something one might use for a bedroom, office or computer system that is best left for music but not today's Home Theater sound tracks. For a room your size, it would be recommended to buy two 15" subs but of course that would be way outside your stated budget.
The short version, it's all about authority (how deep a sub can dig) and the ability to fill a room with this authority; SPL
What I would encourage you to do is explore your budget options as right now, obviously, this is the limiting factor. Working with you, I'd look for a steal of a quality deal in the twelve or fifteen inch size driver range and keep in mind, honestly, for a room your size, you'll need two subwoofers to get strong, quality bass.
The SVS, PB-1000 is an excellent, entry level recommendation. Another of a similar caliber would be the Rythmik, LV12R. Here's a thread that discusses this new offering.Peruse the pages of this thread for more budget subwoofer ideas.
Hope the above helps with the spinning.