Nick,
I don't think there would be any issues. The lower freq's aren't as easily skewed like the higher freq's would be.
The only concerns that I've had about these new brackets is that there does not seem to be much clearance for the top driver, maybe 2-3", which may be ok. I have about 5" clearance with my DIY mounts. One very nice feature is the ability to adjust the tilt so you can angle the speakers down slightly towards the listening area.
Another feature I wish Axiom would have addressed would be the concealing of the speaker wire. They should have a bored out hole in the vertical tube that hooks to the back of the speaker, that way you could run the wires down through and have a nicer finished look.
