Not sure if it’s the same on your Yamaha but on my Denon I saw the same thing… after messing around with it I figured out that I needed to edit “Front/Main/whatever it’s called” manually to show the individual L/R, Center, and Rear.
Lower the "Front/Main" crossover setting all the way down until you see “Individual”. The L/R, C and Rear should appear. Hope that works for you on the Yamaha too.
Lower the "Front/Main" crossover setting all the way down until you see “Individual”. The L/R, C and Rear should appear. Hope that works for you on the Yamaha too.














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... No need to fret.
... OK panic over.
Might want to demo the BP8080's though next to BP8060 since you have a larger room, don't just assume it will sound better. People have different preferences. Find some music and demo them both.