Theoretical question time. I have a pair of Bag End S15-Ds, which are rear ported. It's commonly held that the enclosure on these is tuned kinda high for bass, but they still sound great and are easy to transport - a good compromise cab for many others and myself. What would plugging the port on one or both of these cabs do to the freq response? I can't download bgavin's software due to issues on my PC... and I'm not sure I could properly interpret the data, anyway. I'm not really planning on doing this, but am curious.