Re: Anthem 720 MX Question!
As Curtis noted, check the amp assignment. The 720 internal amps can only be configured for 5.1.2 or 5.1 + 2 zone 2 speakers. So, no powered rear outputs in the 720.
Just to clarify, are you going for 7.2.0 (which means no height/atmos but only fronts, center, surrounds, rears and 2 subs) or 5.2.2 (fronts, center, surrounds, 1 pair of heights, 2 subs)?
With a combination of 720 and external amps, I was able to run 5.2.4 (fronts, center, surrounds, F/R heights and 2 subs) although never tried with rear speakers (no good placement options in my room).
* LG OLED65E6P, BenqHT2050A
* Anthem AVM90, Rogue ST100, VTV Pascal 7 ch
* Sierra Towers/Horizon (all ELX RAAL), S2EXv2 surrounds, HTM200SEx4 heights, Rythmik E15HPx2
* VPI Classic 1+ (VTA & Fatboy Gimbal), PE Eagle/RR, VAS NOVA, Soundsmith Paua, Manley Chinook, Bob's Devices SUT, SugarCube 1 mini
* Oppo 203 & 103D, EverSolo DMP-A6
* miniDSP Flex, Audiosensibility & Blue Jeans cables, Symposium & Isoacoustics, GIK
* For RDJ: Anthem MRX720, Sierra LX, Luna Duo v2 center, CXNv2, TBD