I have an older rec and bought new LSI 15's. now the rec turns off and says overload. does his mean i don't have enough power to drive them? it is a pioneer vsx 505s it was fine with my cerwin re38's what gives? i found if i put the settings on sim surround it works but if i put it on prologic Wham. OVERLOAD. any suggestions besides, buying a new rec that will come in due time but what will work till then?