Subs will add but you must have two or the sound will not time align properly. You would be best having the subs placed closer to the rear wall than the other drivers as well. Most drivers get highly directional or beamy near the end of their frequency ranges so by having a sub you can crossover the main speakers about 1-2 octaves higher and open up the sound stage, and of course the sub will not be beamy- provided that the drivers are not too large relative to the drivers on teh main speakers. Ie a 4 inch main speaker midbass driver will not cross over well to a 15 inch or 18inch sub. MOre like a 4 inch driver crosses over well to a pair or 6.5 inch drivers or perhaps and 8. A pair of 6.5 inch main drivers cross over well to 8 inch subs, or a 10... get the picture? Good luck.
Great sound possible using a Subwoofer?
My speakers are flat to 38 hz but I feel I'm still missing impact, power and weight on most of the pop/rock CDs I listen to. I don't know if a high quality subwoofer would be a positive addition to my system or just add unrealistic bass and muddy up my midbass and midrange. If anyone has extensive experience with this dilemma please tell me what you think. (would better isolation of components, cables or power conditioner help the low end?)