Hi Aid7, I feel your pain; I was in your position for what felt like years and my issues with the K650 took over most of my spare time at one point. I managed to get my issues sorted by bullying Samsung's head office, and even the CEO in the UK and US, and would suggest that if you cannot get it to work to do the same. It was the only way to get them to resolve the firmware issues. It obviously makes a big difference if your units are still in their garantee period because you have way more options and weight behind pushing samsung. So I haven't had any further contact as we agreed my issues had been sorted and I would retract the letter of deadlock I issued. I see someone has suggested there are files linked to on here already; if I remember right Leelazer had the best one and seemed to be the only one that tested all the channels seperatly. I may still have the file on email so PM me your email address if you want it. I've never had a dropout of the centre channel at any point and my issues related to the first firmware updates they did when the K650 came out, so it appears these are a new set of issues. I have the following set up; K650 soundbar 2x R1's All on WiFi K series 65 inch It may even be worth starting a new thread with your specific model and issues and contacting Samsung as I did by email to head office, but be prepared to spend alot of your time to get this resolved. Have you tried to factory reset everything and only use the tv to set up the WiFi? This has solved some issues in the past. Does the centre channel drop out occur when you just use the soundbar (with same connection methods ie WiFi, hdmi) I also remember that when I was speaking with others it seemed people had varying amounts of slightly different issues, and this seemed to be related to the TV model (series) and what wifi they used. As I stated in my previous post this was backed up by my recent failed attempt to swap from the BT home hub to the TP-LINK router. If your problems persist I would consider mode 3 on the hub; again this may reduce the over all WiFi performance but may help your issues. It may help in at least confirming its not a WiFi issue so you can concentrate in another direction. One last question; are you connecting all your units to the 5ghz only? This is by far the best set up for me with home hub on mode 2. I lied one more; have you tried the optical work around to see if this resolves your issues? Only Downside to this is you have to use the soundbar control for volume, but I wasn't affected by this as I use a universal controller. The optical workaround (not discovered by me) is well documented on here and was a life save for me when I was trying to get my issues resolved. Also I think I remember that when you group the speakers in full wifi/multi channel mode the hdmi cable will be ignored by the set up, so sometimes you think you are testing hdmi but your not. Hope this helps as I used to joke about that I would one day get my issues sorted, but I would be divorced and homeless before I got there!
... View more