I have Elac 207.2 floorstanders (which are amazing speakers, by the way). What I'm not sure about is the port bungs. I have to have the speakers quite close to the rear wall, in a fairly small room, and without port bungs the bass is too dominating and sloppy. I need to bung the bass port. However, on these speakers (and I gather on some other speakers such as Monitor Audio) there are two bass ports, one near the top and the other near the bottom of the speaker. Does it matter which port I bung, or do they serve identical purposes? Thanks.