So I have no Idea what im doing and i would really like some help with this... i have a living room that is a good 20' x 17' space and im looking at trying to get a subwoofer for my ht and i have little knowledge about what i need. Obviously like us all i want it to make a thunderous boom on movie explosions and also play well for all types of music. Sorry for not all the information ill get it all for you in a later post. The system that i have is very clear sounding and nice for as old as it is. The Bose Speakers i purchased were at Best Buy and it was Just for some cheap Surrounds to get me by. the Technics are i wanna say arround 80's time frame but are still in mint condition with no dents in the woofers. to be more clear they are some Three foot tower Speakers that include the woofer mids and tweeters. All in all im looking for a decent Sub that is around $100-200 and i know its hard when the best i can find are some polk 12's on Amazon for $100. Thanks For Some Help!! My Setup: T.V.: Samsung 40" LCD Reciever: Pioneer Elite VSX-09tx Center spk: Bose L&R: Technics LR & RR: Bose