I have a 42x70 foot dedicated theater room. My equipment is Onkyo T Nr 5009 receiver, Emotiva XPR3 connected to receiver for front left, right and center, Goldenear Triton 2 speakers and surrounds for a 11.2 speaker setup. I would like to add two more speakers to the front for left and right to give me a wider sound stage to fill in the gaps of the large room. What additional equipment, if any, is needed and how do I hook it all up to add the additional speakers?