jedi35The only "2.2" I see in the specs is " HDCP 2.2 Copy-Protection Compatibility". As for the HDMI, the newest HDMI written spec is 2.1 with only a handful of A/V equipment available with it now. It looks like 2019 will be the year of HDMI 2.1 and High Dynamic Range Plus (HDR+). Until then I'm sticking with my old stuff....
trak49Well then this receiver IS one of the few that has HDMI 2.2. Here is a quote from a link that describes the 730...
On the video side, the TX-RZ730 and TX-RZ830 include HDMI pass-through of HDR10, HLG (Hybrid Log-Gamma) and Dolby Vision formats as well as 4K/60p, BT.2020, 4:4:4, 24bit, and HDCP 2.2-protected video. Six rear HDMI inputs, Main Out, Zone 2 Out (Sub Out on the TX-RZ730) and a front HDMI input are included on both models.
https://theaudiophileman.com/onkyo-rz-tx-rz730-tx-rz830-news/#comments
Hope this clears it up for you...