I look long and hard at earphone before I buy this one , but that in no way say that I know all there be to know about they -lrb- not even a fraction actually -rrb- . simply because there be just so many earphone you can get to try before you buy . I be skeptical about what kind of difference there might be between a $ 5 set and a $ 30 set . I be pleased to report that the difference be worth pay for : -rrb- it be not like I have use a whole magnificent range of earphone to be able to notice a difference . I have be a stock earphone user , and move to this one ... there be a huge difference in sound ! the range and clarity be great ! and more so be the sound-isolating property . I figure it be the great fit of the earbud inside you ear-canal . so it be imperative that they be insert correctly -lrb- they plug you ear to the outside sound -rrb- . as a experiment - plug you finger into you ear and hum to yourself - that be the way it actually work ! the hum be just to give you a idea of how the sound quality will change for you ; -rrb- -lrb- yeah I know that you own sound travels through the bone and not through air ... but the effect here sound just like it -rrb- . I do notice what the other mention as `` heavy bass '' of the sony phone , but I can definitely live with that . it be not like the sound be all bass ... it be just a tad more than what I would think the music will actually sound like . but it be all good -lrb- yes folk . . it really be -rrb- . after this ... I be pretty sure that even more expensive earphone must be something special -lrb- when I hear through these ... i can imagine those tiny difference that might improve even this quality -rrb- . but at present I would not like to spend $ 70 on another pair of earphone ... so I be stick to these - and love they : -rrb- cheer !