Hi,
I purchased an A9 before Christmas and have some experiences to share in the hope that some questions will be answered.
I had to switch my network settings from WPA2 - TKIP, to AES to get the A9 to connect to WiFi
The ping pong noise it makes when registering on a network occurs randomly about twice a day. Sometimes in the early hours, almost like it is dropping off the network, then re-registering. B&O advised me to buy a new Cisco router as they can only confirm compatibility with the routers they test with.
When playing via Airplay the sounds drops out randonmly. I've switched to a LAN cable to see if it was the WiFi signal and it still does it.
If you look closely there is an optical input next to the LAN port. This isn't advertised so I expect a firmware upgrade in the future may activate this allowing an optical input.
Some DLNA clients work well and adjust the volume, some don't control the volume at all. Its worth checking before you buy one.
Stereo separation isn't great but having a single unit allows for some great placement options.
Replacing the cover is very simply but you need to smooth the edges to remove any ripples in the fabric
Overall I love the A9. If anyone can shed any experiences that would resolve the above points I'd be greatful.
No, the B&O shop were pleasant but not very helpful