No, not sure how to check power cord polarization. Please tell me.
However,, I read here, about checking speaker cable polarization. It was correct. However, when I used the new speaker cable on my other system I noticed what seems to be the same issue. I believe this speaker cable was spliced at the factory, and blue jean didn't check ohm. and thus the lack of bass. The cables show a solid wire, but a spliced 10 ga wire, when spliced, won't transfer the bass signal in its entirety.
Btw, Hegel did respond to my requests.