I'm a kind of a newbie here trying to find out what would be the best option to improve the quality of my existing HT system (3.1). And because my subwoofer (from a 'HKTS 8' Harman Kardon HTIB package ) died few months ago I'm thinking about replacing the system and would like to start with a subwoofer.
First of all, I have the system set up in a huge open "great room" space that's has two sides wide open to a kitchen, foyer and breakfast room. And the great room (15"x23"x18") has and the total square footage including the kitchen, breakfast room, etc is about 26"x20"x9"). I've read some posts here and found it'd be quite difficult to have good bass to fill in this large space and my budget is limited at $300~$400 for the subwoofer.
I'll be using the system for 75% movie/TV watching and 25% music. If anyone can suggest me a good subwoofer to fulfill my needs, I'd appreciate. By the way, I currently have a Harman Kardon AVR254 receiver, Energy C-50 front speakers and Boston Acoustic center channel (don't know the model name). I did order a pair of Cambridge S30's to replace front speakers. Would I need to replace the receiver and the center channel? Also, would the Cambridge S30's be good addition to my system?
Thanks in advance!