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Title: very poor sound quality
Review: I've owned a 20gb 2G iPod for a while and absolutely love it. However, I recently upgraded to the 4G 40gb and was sorely disappointed. After putting the same music on the 4G unit (and using the same pair of headphones) I was struck by how poor the sound quality was compared to my old iPod (or other MP3 players). I would disagree with other reviewers who say the poor sound quality is only noticeable to audiophiles--it is glaringly obvious: the sound is shrill, hollow, with little bass and obvious distortion on higher volumes. It is so bad that I am returning my 4G unit and sticking with my 2G version.
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