1. AV amp speaker cable to 35.mm plug -> bluetooth sender -> bluetooth reciever -> RCA -> poweramp -> speaker out to surround speaker.
2. AV pre out , use RCA -> bluetooth sender --> Bluetooth reciever --> RCA -> Poweramp --> Speaker out to surround speaker
3. method 1 + method 2, except use active speaker but depends on the input method, either 3.5mm or RCA
Any Ching have experience on this and work fine. Although the first Ching mention method 1 but it seems method 2 is better.
I am now using KEF 5005.2 wireless for surround but want to change a better surround speaker and it may be wireless transfer. Don't ask me the reason why don't use wired connection.
AV amp speaker cable to 3.5 mm plug -> bluetooth 5.0 sender (support Aptx HD & Aptx LL)-> bluetooth 5.0 receiver (support Aptx LL but not Aptx HD) -> RCA -> poweramp -> speaker out to surround speaker.