I have factory navigation head unit in my C6 and it sounds OK, I was in a friends C6 that doesn't have navigation and his factory radio sounds much louder and has more bass than mine? Is the non navigation unit better receiver?

I've noticed that also, my friend said it's most likely because the OEM receiver in nav unit is working twice as hard with the same power, or something like that? :willy_nilly: He told me this awhile back and I total almost forgot what he said. I thought it had something to do with the power usage?