Help with kef r900 issue

maritime51, please understand up from that I am completely on your side and would love to see KEF pay the $300 freight for sending the speakers to them for repair. I have read everything you wrote, but look at it from another point of view. First, it is weird that you are having a problem with both speakers. Second, if this was a true latent defect I personally don’t think KEF would blow you off.

You did not acknowledge what I wrote above and have copied right here, as it seems like one of the only possible explanations remaining: "Is it possible that your speaker cable is so low impedance that they are causing your amps to oscillate like could happen with Goertz Alpha Core cables used without the supplied Zobel network? Do you have another brand speaker cable to try, even if its Home Depot lamp cord?

KEF did not explain this to you as they should have, but I had a similar thing happen to me (not with audio) where I wanted someone to do something special for me and not blindly follow the company’s stated policy. They explained that if they made a special exception for me, then all the other customers that had a similar issue would be able to pretty much have grounds to sue the company (or whatever) that the same special consideration was not made for them.

My bad maritime51, while I knew that you had changed the speaker cables, I thought that they were all of the same brand.  Hope you sort it all out.