Yep, we missed that; at least I did. Sorry

Just curious, a quick glance at the back of the RS450 seems to show two ports; one above the centerline and one below the centerline... is the divider at the bottom of the lower port or something ?

That picture is misleading. The white endcap was still on the speaker to keep the bottom from being damaged by my deck. If you want to see where the internal brace is, look at the pictures from the front. Where the grill connects in the middle is the approximate location of the brace. You can see it in the stock photo at the beginning of the review.

Yep I did read over that and it obviously never made it into the brain. Sorry. Reading it the second time and I now remember thinking to myself as I read it the first time, why would somebody spend that kind of money for a bookshelf that sits on the floor. I guess it fills in the void somewhat from their RS250 (true) bookshelf and the RS750, I believe is the next number, which is almost twice the price.

Now I guess it begs the question, what would they sound like with the full volume of the cabinet available for the drivers? Similar to the M50 I would bet.

Possibly so, Jason, but size and pricewise(adding shipping)it would be closest to the M60s.