I have Definitive Technology bookshelf speakers now on stands and bipole surrounds with a Velodyne HGS 10 sub in my new dedicated H.T. and i'm just not getting the same amount of bass as before. Then I had a basement below so the floor transmitted bass energy but now the floor is concrete slab with carpet over it. My question is: would it be better to go with Def Tech 7006 with built in subs or would a new SVS be the ticket? I am reasonably pleased with the speakers I have but the lack of bass ain't cutting it.