WOW! I don’t know if I will have enough space to complete my response.
I am in no way a audiophile but I know my way around my system, I think. I have tried everything conceivable to me. Let me start by saying the R28PF’s do pair with my iPhone 14. ( but doesn’t produce sound ) But it will not pair with my Denon X4200. The X4200 is a little dated,released in 2015. With that in mind through much research I found that Klipsch speakers have the aptX Bluetooth capability. ( COULD THIS BE A BLUETOOTH ISSUE? ) The only way that I know that I can confirm or refute this idea is to update my AVR to a more recent one. Why I absolutely love improving my system I don’t want to upgrade only to find that it is a speaker issue. One other problem I had with pairing was with the audyssey app. While I could run the speaker correction I couldn’t pair with the graphics chart that shows what is going on. To add I also tried every preout to see if I could get a connection with no success. I even unplugged every single connection to the pre outs to try and restrict any possible interference. No luck. And like I previously stated I have tried every medium to get something, anything, but again, no luck.
A side note: I absolutely enjoy Klipsch speakers and other products but in the booklet that comes with the speakers states emphatically that all you need to do is plug up the RCA cables and you are home free. That couldn’t be any further than the truth.