these be work fine for I . I can not believe how great the sound be . as to the bass , I just put these to the `` bass '' test . one of the most demand track , in my experience , be the song `` one '' by Metallica . you know that part just before Lars ' double bass kick in ? well , there be very few speaker that can handle that , especially with the volume and the low end bass turn up . I may have hear one pair of speaker in my life that could handle that part of the song without distortion , and those be 100 watt 3-way speaker with 15 '' woofer . well , I just listen to that part on these headphone with the volume up about as loud as I could stand , and with the low end of the equalizer turn up almost all the way , and guess what ? no distortion !? I still can not believe it , but I just hear it with my own ear . these thing really do go `` inside '' you ear ! in fact , I would say to be careful that you do not shove they in there too far , or too fast . and be careful pull they back out . you have only get 2 eardrum , so do not be reckless with they . to the person who complain about `` too much bass '' distort the audio , do not you mp3 player have some sort of equalizer ? I would think that almost any mp3 player would have at least a 5-band equalizer ? -lrb- as far as I be concerned , any mp3 player should have a 10-band equalizer , but I guess we can not have everything . -rrb- one complaint : there be no volume control build into the wire . I have buy much lesser headphone that do have that feature , and it be a shame that they do not include that feature on these , but , oh well . I see they be on sale now for $ 3 . oo !? wow , now that be amazing ! I think I be get a amazing bargain because I only pay $ 7 . oo for they !