Thanks for the reply.
I guess i have to refrase my question into 2 new ones.
1 is the audio quality of the a20 in general comparable with the quiet comfort headset?
2 are people satisfied with the aux-in option on the a20?
Talking about quality of an iphone or mp3. I don't think it makes huge difference on quality when listening in an aircraft. It matters to me if the ANR is good for aux-in music like it is on the quiet comforts.
Thanks again,
Chris