as expect with bose , these headphone provide excellent sound . the balance between the lower and higher register be excellent . listen to Bach , I could hear the violin and the cello with equal clarity . the headphone do a good job of block out sound so I definately discourage use of this product while drive a automobile -lrb- however use at home when the wife be around it be another matter - smack ! -rrb- . the weight and bulk of the headphone limit it be use somewhat and I would not recommend use these headphone during a heavy workout . admittedly , I have not price this product -lrb- it be a gift -rrb- with other product and my four star be conditional upon this product be within a relevant range of the competition . this be my first pair of quality headphone , I have to say that for use in the office work on a spreadsheet , there be nothing I have try that be better .