I'm looking into getting headphones to go with a M4. Does the M4 have a microphone amp? If it doesn't am I right in saying that I'll need to get low impedence headphones unless I get a seperate headphone amp.
As long as your only running one pair out of the headphone jack, you will not need an amp. And any standard headphones will work just fine(Sony's, AKG's, Sennheiser's).