However, I can't say that I've ever noticed the ANR box, so they may be using them as passive only? I'll have to ask to see whether it's because of compatibility or choice (don't want to hear the student wittering on!).
Thanks for your reply, please ask them and let me know
When you order your ovation3 or Acclaim get the factory fitted Bose-Xs for the front seats - then you won't need to worry about battery life.
If they are really that good, i couldn't imagine anyone buying a new plane without fitting these things in front...