"You may have trouble running 9.2 with a 7.2 receiver"
I didn't get as far as I wanted to checking things out, but the 775 does have outputs for "presence speajers" its called 7.1 + 2
With the 818 the lowest sub xo was 80. when i'd run xt32, my fronts would be xo'd at 40, which I'd change.
the 775 goes to 40 iirc, for a running start I went with 60 xo.
You have an option to set the FL-FR to 4 ohms
I was able to download the manual (yes I have the disc) over the weekend (on to a computer at another home I stay at) from something like "Yamaha.usa.com" , poke aroiund or such. its huge.
I only got as far as 3.2 last night but tried out the 3D option for some of the sound fields.
I may go with the pre-outs to the UPA7 for LCR and Surrounds.
while it may not do much Sub EQ, I do expect to spend some time with REW and the Inuke6000DSP trying different placements and my freshly built it all by myself SUBMAXIMUS, a LTD02 LARGE FLH for the UXL 18. there is thread in the DIY section.
In the meantime, the 2 BF THTLP's kept things moving.
I have to reconnect the PS3 and try some movies scenes, U-571 first comes to mind.
Denon X4000 , Emotiva UPA7, Yamaha 663 for 14.3, configurable from 10.3 and up
Klipsch F3 FL/R, G-28 CenterLow, Icon 25 CenterHigh, RC3II: SL/R SLX: Rears ,TF & TR, RB51's:FH
2 30" BF THTLP'S and SubMaximus and Inuke6000DSP
Mitsy DLP 73837 Xbox1 PS4 Panny BD 220