For me everything sounds just fine on the 11". Actually, I'm surprise at the volume this little guy can pump out. No buzz or weird sounds at the lowest or highest spectrum of the volume.
Any further info on this?
My right speaker buzzes at high volumes/video calls when people speak occasionally... Tis annoying!
After about a 45 minute wait at my local Apple Store, I explained the issue. The people at the store by me claim they have not yet heard of such an issue and there is not any "engineering note" available. However, they quickly exchanged it, no questions asked. I have not yet opened the new one and probably will not have time to post about this for a few days, but I will definitely let you know how the replacement is.
Please let us know once you do
My new 13" has this problem. You can't notice it until 90% volume, it's cracklery and sounds terrible. My replacement is on the way. Apple credited me £100 as a good will. So with student discount I'm paying £845 for a 13" 128gb air.
exchanged for another 2011 air and the speaker quality is still not as good as the 2010 13". im surprised no one has noted this in any reviews.
As pointed out by a MR member (this thread or other thread, can't remember), you can imagine:
2011:
keyboard
----------
backlights
----------
speakers
2010:
keyboard
----------
speakers
The backlights might not be something huge, perhaps very thin extra layer of component, but sound is very sensitive to any object blocking it, even a thin piece of paper.