So this is my setup
Laptop connected to mixtrack pro via USB,Mixtrack pro out put 1 connected to Harbinger APS15 Via Rca cables Mixtrack pro output 2 connected to 2nd Harbinger APS15 Via Rca cables and headphones connected to the headphones jack . For some reason when i have the knob on cue and try to listen to the cue on headphones it comes out in the headphones and the speakers. Why does it come out on the speakers can anyone help me out ?