New Magneplanar Bass Panel DWM

They also suggest the DWM to be on the same plane as the speakers but 12 inches closer to the listener. I cannot see any WAF in these as it looks like you would have to have a dedicated room to be able to pull this off.

Josh here is what magnepan says about it
http://www.magnepan.com/using_DWM
Phasing-- Imagine scribing a line on the floor at the same distance as the speakers by using a string attached to the listening chair. The Bass Panel can be placed anywhere on this equi-distant arc. However, this equi-distant arc needs to be 12 inches closer to the listening seat for optimum phasing.