The following is a quote from my Aerius i manual (which also uses the plastic strips:
"The clear Lexan panels on the back of the Aerius i stator are the key elements of an innovative pressure compensating technology. Martin-Logan is able to tone-shape the diaphragm + or - 6db without the use of an insertion loss crossover. The advantage of this system is a high efficiency driver with wide bandwidth capabilities of dimensions which are easily integrated into a domestic environment."
Whew! I can't figure out what it means, technically, either. And it looks like Martin-Logan may not know too since they left this paragraph out of subsequent manuals.
Thx, the main reason I ask is i find the speaker a little bright and abrasive at some frequencies. I did not see these on the larger stats and also dont hear the brightness. My room is not overly bright so I have to assume its the strips! Thanks for the reply. Chris.