Bad Sound on DDJ SX 2 (Any Fix oder Idea Please Post it here)

Hey Guys i bought my self an DDJ SX2 1 Month Ago now i am using it with Traktor Scratch 2 since i don't like Serato that much , but i got the feeling that the Sound is very bad and there is like almost no Bass at all , i was using an DDJ SX a couple of months ago with Virtual DJ 7 and the sound was simply amazing and clear and the bass was just amazing.

now i want to ask if somebody knows any solution to get rid of the bad sound inside Traktor ? i got the feeling that the Pioneer DDJ SX 2 got worst sound than the Original SX by Pioneer.

i am Using an Macbook Pro with OS X El Captain , and not even in the Sound Settings i can change from 44Khz because its greyed out.