All other things equal, will the SVS 20-39 PC+ be "louder" than the 20-39 PCi before bottoming out? By bottoming out I mean the distorted whoosh like a fart coming from the top port. I think I should have gotten the 20-39 PC+ for a room 15x20x8 open to a 11x20x8 room. And yes all calibrated with a SPL meter. Help. Thanks!