Do you have a mult-meter/volt meter. I might be wise to check the voltage produced at your avr and confirm with axiom what is required. Might just be a compatibility issue. I may be grasping at straws but I think it might be worth exploring

LFR 1100s QS8s QS2s ADA15000-4, VP 150, M 3s,Polk CSI A6, Klipsh B10B, SVSPB2000,PSW125x2