The subwoofer I was leaning towards buying was the SV PB12 ISD (side ports), the Outlaw was in the running as well. I understand that the Outlaw has ports on the bottom.

If the Outlaw ports are no more than 1-2 inches from the floor surface and it doesn't affect performance, why would the SV subs ports be affected being 1-2 inches from a wall surface?