A:AnswerAs of today, this receiver can only be used with Alexa. It's not HomeKit certified and if it were I'd definitely use it with my HomePod. You can however use Airplay to pump out your Apple Music from your iOS device.
A:Answer8 own nominal impedance is not unusual; for speakers. I'm sure it'll be just fine. My system has both 6 ohm and 8 ohm speakers and everything sounds just dandy.
A:AnswerI have 5.1 setup not 7.2 but have surround by selection of Dolby surround and when I check inputs and outputs they show all of my speakers and I get sound on all. For cable I seem to need hdmi and the same for my blue Ray which auto chose the correct out put
A:AnswerI use the fm Atenna that came with it I live in a big enough city not to really need a strong atenna how ever since the receiver is WiFi I can get local live stations with the radio app that is installed on the denon hope this helps