Re: Dolby Atmos using Bose 700 soundbar 5.1 system
The connection looks like this
1) TV ARC HDMI --> Bose Soundbar 700 HDMI IN
2) TV HDMI IN (non ARC) --> Receiver ARC HDMI, make sure ARC function is enabled on the receiver
3) Receiver Out Hight Channels --> Overhead speakers (2 or 4 depending on preference)
4) Receiver HDMI IN (non ARC) --> UHD player or a Media player like Roku. I use Roku which supports Dolby Atmos passthrough.
Due to connection #1, you can use the soundbar for normal viewing of content that does not have Atmos, without even turning on the receiver. Just the way you would have it connected currently. Even an optical connection would work.
To get Dolby Atmos, turn on TV, Bose Soundbar, Receiver and play the Dolby Atmos content from the external device connected to the receiver.
The external device --> Receiver --> Overhead speaker (only the discrete height channel is passed)
The external device --> Receiver (HDMI ARC) --> TV HDMI In --> Soundbar 700 through TV HDMI ARC
Hope this helps.
The rationale behind using a 9.2 channel receiver is that I was planning to extend my setup to 4 overhead speakers. If you plan to use only 2 overhead speakers you can use a 7.2 channel receiver.