Strange distortion on Traktor

I've been noticing that the quality of the tracks I'm playing, specially the loud ones, is worse than it was.

I play with Autogain ON, Limiter ON and -3db of Headroom. Now when I get it to Autogain OFF, limiter OFF and zero headroom a single track will simply distort like hell, like fully on red.

It happens with all the tracks, the master volume is at +0.0 db, the pitch fader at zero and all the effects are off. Why would a track distort so much on those conditions??

If everything is at zero and there is only one track playing it was supposed to play like on iTunes, wasn't it?

I tried to get the master volume down but it will simply sound distorted even if its not reaching red! WTF

Oh problem solved, I was outputting the Monitor channels to my headphones and not the Master ones...

Someone should close this thread, sorry.