Originally Posted by unleashed

I have a pair of standard airline 3-prong noise-cancelling headphones that I would like to use on my next flight in economy (non-premium).
Flying TPA-LAX so it's safe to assume it's gonna be the 77M version with Panasonic EX2 AVOD.
Is there a 3-prong audio port in economy on that aircraft?
If not then what kind of a port are they using and where is it located?
Is there a USB port in close proximity to that connector?
Thank you