Thanks PENG\nI would probably run the YPAO, but from what I read and understood, you still need to set the amp settings so that the receiver recognizes you are using the external amps for the two height pairs of speakers. I'll reread the instructions again to be sure.\n\nYou maybe right but I highly doubt that, because page 131 does sound like it is for manual setup. I have not owned any recent Yamaha model but have owned Marantz, Denon and an older RX-V659. Typically if you run the auto setup it will ask you if you have the surround back and presence (Yamaha thing) channels hooked up, and do the rest for you. They really don't care, nor should they, about whether you are using external amps or not. They only need to know the what amp\/or amp channel you want to assign for customization if you are using a combination of the main 5 or 7 channels plus zone 2 and 3. \n\nThere is no harm to try anyway right? In any case Yamaha seems to have improved their YPAO by a mile, probably as good as Audyssey XT32 now and even better in certain aspects so you may like the results.