I have LSI 25 series speakers with two tower, two on the side, two in the back, one center and 650 sub-woof. These are rated at 4 ohms. I have a Pioneer 47TX which is rated at 6 ohms. My amp is always running hot and sometimes will shut down. So we know we have an impedance problem. Is there anything that I can do to resolve this problem without putting resistors in-line or changing out the amp? I'm very limited in my knowledge of electronics and I'm getting different opinions from Polk and Pioneer as to a resolution.