My Yamaha RX-V461 would sometimes tell me my speakers were wired wrong. I found it had to do with the subwoofer and setting the manins to large and bass out to both. I didn't realize at the time the sub and mains were canceling each other out, resulting in no bass. It would think the mains were wired wrong, I had to reverse the sub polarity to get bass.

Then I learned it wasn't the best set up and set the mains to small and bass out to subwoofer and everything worked and sounded better.


Yamaha RX-V2700 / CDC-815 , Oppo DV-980H , Axiom M22s , Paradigm DSP-3100