There are two options. I don't own a 1900 by the way.
First, see if you can turn off speaker size detection during YPAO. Before running YPAO, set all your speakers to small.
If that does not work, simply reset your speakers to small. That seems to work ok. I can't say it's optimal, but it sounded ok to me when I would do that on my RX-V2700.
First, see if you can turn off speaker size detection during YPAO. Before running YPAO, set all your speakers to small.
If that does not work, simply reset your speakers to small. That seems to work ok. I can't say it's optimal, but it sounded ok to me when I would do that on my RX-V2700.