
I have korg pa3x , a passive mackie profx12 mixer, and a pair of powered EV ELX 115P
I connect left and right output from korg (using Quarter inch cables) to the mixer balanced L/R on same strip, I also tried connecting them on 2 strips to get mono sound. Anyways, my speakers are obviously are connected to output on the mixer like it is suppose to. The problem is I am getting a bad quality out of speakers when im playing at normal volume and when I increase. The bass doesnt sound as sharp and drums do not kick well, everything is just dirty, I do not know how to explain. I set up gain pretty well so gain is not an issue.
But when I tried to connect korg L/R outputs straight to the speakers via qurter inch cables, the quality is great. I can turn up the volume and everything is just great, the bass, the drums no problems.
So is my mixer bad? What should I do to get best quality out of my speakers. I know these speakers are great, I am just not able to get best out of them

Maybe I should use different cables? Or connect something else on korg? Please help. Thank you!