I split my connection from my Headunit output and my PC output with two, 2 Female 1 male, Y Splitter. So both right channel into the rights and left of one splitter and the lefts on the other. Used monster cable Y splitter, http://www.circuitcity.com/detail.js...rk_3&oid=10910

Now if I have only the radio on, the sound is great, just like if it was just a regular RCA cable. BUT, when the PC is on the radio output just drops. The treble drops and the bass is turned up (the sound not the settings on the radio) So inorder to sound like it did I have to turn up the treble and turn down the bass, but still sound muddled. The PC output sound the same, single connection or with the radio on.

Not sure what to do to solve this, could it be the splitters? I mean this only really affect the radio when the PC is on.