I'm talking subwoffer's here not sub sandwiches. :) I'm ready for all the wise cracks. But seriously I've heard on this board that one person installed a sub and couldn't hear it that well due to tight A4 construction. Anybody happy with their sub? It seems if you have the all weather package with the ski boot that the bass should work through there. After all the back seat is no longer a solid object with the pass through.