I have this system: http://www.smalldog.com/product/35624/atfgc It plugs into a computer via a headphone jack. It doesn't work with my new mac pro. Works fine with my powerbook. All sounds are just coming out of the mac pro speakers, which are terrible. Any ideas? Errr, apparently that wasn't a headphone jack on the back...but audio out. Works fine on the front, but I'd rather plug it in on the back (otherwise ugly cable on front), anyway I can do that with an adapter or such?