I've got a pair of 32ohm Yurbuds that work perfectly with my Droid OG but have a horrible hiss with the Thunderbolt. Anyone else having issues with earbuds/headphones/IEM's? However, I can use my crappier quality 24ohm Philips SHS391 wraparounds and they work fine although I have to turn it up to 9 just to get decent volume. Music via the speaker works flawlessly and without hiss. And is plenty loud.