Quote: I will try to get a better source, thanks. Quote: Asus Xonar U3 portable soundcard.

Quote: I think my source is too powerful at 22 Ohms output and the HD555 sounds strange. Sorry my bad, 120 is what they were rated at.

Hi, I currently own a newer model of the HD555 and I've realized that it is 50 Ohms unlike the older models. Is there anything I can do (like an adaptor?) that can raise the impedance to the old specification of 120 or close? Thanks EDIT: it's 120, not 150 my mistake