I've been collecting specs on the Column II and my list reflects 6 db per octave. There is also a pair on eBay right now and the description shows them being 6 db per octave.
Column II eBay
http://cgi.ebay.com/Infinity-Column-II-Vintage-Hi-Fidelity-Loud-Speakers-2_W0QQitemZ380039383792QQihZ025QQcategoryZ50597QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Well, I guess I'll need to examine the voice coils for damage. I'm too much of a novice to know what a high/low pass filter is. I'm still learning.
BTW, your pics remind me of my cousins audio/video system. His equipment though is all rack mounted in a special room. I don't even know what most of it is but it is really impressive. He has eight theater seats set up with a projector system in the viewing room that is just fantastic.
Also, I couldn't help but notice that you're using Carter gear and that just happens to be my name.
Thanks again for your reply! I'm learning as I go here and loving every minute of it.