DK888

Hi, I'm a newbie to this. I'm running a VIA M2 10000 setup. 2 amplifiers one for highs and mids...the other for subs. I'm using a Alphasonik EQ/crossover and the sound output from my computer is LINE-OUT. I "heard" that if i change the setting for the *yellow* rca jack behind the computer....sound quality would be ALOT better. IS THIS TRUE? I'm asking because I want to run to 7in. monitors in my headest and I was thinking of using that as video out ONLY IF there was not much sound difference. PLease Help!