Good day. I am having a problem with my Pioneer DDj SZ with sound quality and poor output. I switched over from my Denon 3700's and a simple Numark x6 mixer (24bit). I use the QSC K12.2 speakers Kw181 subs. The sound quality is like night and day with the SZ vs my Denon setup. And when pushed a little bit the SZ sounds distorted, with no definition in sound. The high end really sounds bad. I also have to turn the line levels up very high to get decent output. I even came straight from the controller to the K12.2 with no sub, and the quality sound is just not there. A buddy of mine said I probably need a outboard mixer to boost the signal. Or the K12.2 and the SZ don't like playing together. I really love the controller, but at a price around $2000 I don't feel that I should have to use a external piece of equipment to get great sound.------- Also, before buying the SZ I purchased a Numark NS73 and the output and sound was much better. I just could not get pass the all the red lights on it.------- Does anyone have any suggestions? Or maybe I just got a bad unit. Or is this just a common problem?