Jim,
Disturbing the wavefront was my concern as well. Without an array wavefront simulator of some kind it's hard to imagine all the wave interactions in my head. I plan to get some drivers in the near future and play with some cabinet mockups and we'll see what happens. I'm sure you're right, but I have this curiosity inside me to try out a stepped baffle and see what it sounds like. Maybe I'll get ambitious enough to do that someday. ![](http://www.audioroundtable.com/emoticons/smiley.gif)
By the way, do you have any thoughts on how the new CSS WR125ST would work in an array? I'd like to build using high-quality components to get a very high performing speaker, and have my eye on the 16-ohm version of this driver, to be paired up with an array of either BG Neo3 or Fountek JP-2 tweeters. The link for the CSS driver is:
http://www.diycable.com/main/product_info.php?products_id=533
Thanks,
Dave