Well I don't really have an answer for you yet, I have a new 2805 but don't have it hooked up yet as my Axioms won't arrive until Friday. I'm sure there are some 3805 owners out there that have used Avia. I wonder if you have the rear hookups set for 2nd room? I know in my owners manual it says the rear surrounds can be used for 7.1, or used for a 2nd room and then the rest are used for 5.1. Doesn't the 3805 have Auto Setup and EQ like the 2805? It should detect if there is any problems with polarity or hookup issues...
