I had an old Koss KE-29 earbuds with volume-slider in the wire and it worked great. Few weeks ago they broke and I had to buy new ones. Now I have a Koss KE-30B -which is basically an "updated" version of KE29- which works as great. I must say however that the new version has far too high bass levels in my taste, for example audio with speech only doesn't sound good at all... actually it is barely bearable for me to listen to it now. For music I guess it works.