Zuki,
I can't imagine that using the additional QSC inputs give you any more control than the volume knob on the PA4X. Since the inputs on the speaker have no separate tone controls, and the 4X has all the needed EQ, and FX ... how is it an advantage using 2 extra cables, to get the same result?
Not being critical ... just wondering if I missed something. Everything gets summed into the amp of the QSC, so what is the benefit of using the extra wires?