Seems that this Zune follow normal standards of USA made players.
from:
Microsoft Zune Review
this:
Sound Quality
The Zune’s sound quality is good and will suffice for the majority of users, but if sound quality is a very important feature, you may want to look elsewhere. The very high end and the very low end are somewhat blurry, but something you can only tell with a really nice set of headphones and some critical listening. Sound quality is average at moderate listening levels, but tends to fall flat and louder volumes.
Nothing else to say, the same product as USA. Korean and Japanese MP4
:roll: