Reply to Volume on Audio 10 with Db4 with Timecode very Loud

I have just bought Timecode last week and this is how I have it setup . I have 2 Numark TTX1 turntables going into the Audio 10 then into my Db4 but I have to turn the internal volume on Traktor down to something like -35db to get no distortion on the sound but the sound still doesn't sound very clean .

I have also tried using got 2 remix decks but have to crank the gain on the mixer and traktor way up to get any volume . I there anyway to change the volume on the audio 10 or any tips on settings for a better sound.