With a significant improvement in bass depth and sound quality, the new HD speakers have been engineered to deliver crystal clear communication as well as a premium sound experience. Also, to improve physical comfort when worn, the edges of the speakers have been beveled to minimize potential rubbing between the ear and the edge. Definitely - the new HD speakers rock!
-Up to 50% better audio quality -Improved bass depth -New bevel shape -Updated Apss with audio equalizer presets