Hello. I have a modest hi fi (CA640 A&C and B&W602's) in a small room (3m x 2.7m (opening onto a kitchen.)) I was wondering if I should add a sub to my system. I quite like bass heavy music such as reggae and dub. When I listen to my system I am generally satisfied, but sometimes wish I had a bit more low bass.Do you think it'd be a good idea to add a sub to this system given the small size of my listening room? Is it even possible to add a sub to my amp? I was thinking about a b&w asw600. What do you guys think?