I recently picked up some B&W 602 S3's and they came w/ the foam to cover the front ports up. I see on the supplied chart a smoother freq/dB line, but I dont exactly know how this translates for me. I also read that it helps for smaller rooms, which mine is (16 long, 11.5 wide, 8 tall). Right now i only have two front speakers, and listen to 80ht/20music. Surrounds will most likely come next (601 s3s) and then most likely an HSU STF-2. ...in the mean time, are these port blockers for me?