How about some Bluesound Node’s?
I use them to connect my office (2nd floor) to my main system (LR 1st floor).
They use wireless connections. The newest model can utilize the 5ghz band. (But, added a Netgear adapter to-utilize the 5ghz network-to my Node 1’s, and they function perfectly- and at a fraction of the cost, since I bought used)
You could also use Ethernet cable to connect two systems.
Bob
I use them to connect my office (2nd floor) to my main system (LR 1st floor).
They use wireless connections. The newest model can utilize the 5ghz band. (But, added a Netgear adapter to-utilize the 5ghz network-to my Node 1’s, and they function perfectly- and at a fraction of the cost, since I bought used)
You could also use Ethernet cable to connect two systems.
Bob