harman kardon soundsticks

Not sure if this is the right forum or not but I have a set of sound sticks hooked up to an airport express for air tunes...I mainly use my iPhone and iPad to stream music, however I would like to also hook the sound sticks up to a desktop PC and be able to use them with it also...is there a special kind of splitter that would allow me to do this? I would assume I would need a three port female splitter but I'm having trouble finding what I am looking for...also assuming that this can be done would I lose any sound quality? Or enough to even notice?