Totally agree what some of the other guys have said re PFX!
I fly offshore heli, had a Bose X loved it, sold it as it was getting on a bit and decided to try the PFX. Great ANR, Battery life is very poor i was changing the 4 AA every 3-5 days depending on hours flown, ear cups make odd noises when seal broken, found the Battery unit big and bulky.
Ive sold it after 6 months and going to try the A20.
