Hey guys, My sound jack stopped working today, I've tried with 2 sets of speakers and I'm not getting sound out of them. When I plug the speakers jack into my macs sound jack the music that is playing on the mac speakers turns off, but then no sound comes out of my other speakers. Maybe it's a setting, hope you mac guys can help me out. My mac is the 13" pro top speck. Thanks in advance for any help. Dxb.