The biggest difference I noticed with a subwoofer is with home theater tracks. It's like night and day! I was running 2 HUGE Studio Monitors with 2 15"ers a piece and did not think a sub would add much. Boy was I wrong! If you have a local A/V store in your area go listen to one and you'll notice the difference. A sub(or 2 or 3) is the only way to go with DD DTS soundtracks.

Lasher