Purchased the DC 13X (I think that's it,
) ANR headset last year, and would NOT ever go back to a conventional headset. Occasionally I might forget to turn them on during taxi, but I can tell you, once I start powering up for take off, it becomes plainly obvious!! Flicking the on switch is like going to heaven,
.
Worn them inside King Airs on occasions as well, and it's dead quiet.
morno