No, I haven’t heard back either. But I have an update: Unexpected Standby doesn’t happen in MANUAL mode! I left my two in this input mode for 3-4 days, and they didn’t drop to standby once. Then, back to LFE mode, and voila, Standby, from which they can only be woken with a strong 30Hz tone (from REW). I notice from measurement that MANUAL gives more dB’s, so I am currently experimenting with a signal voltage of 1.1V in LFE mode (1V wasn’t enough).
I’m getting close to sending these back, and I do wonder if the KF92 has similar design faults.
just a silly thought: would these issues disappear when using kef’s wireless module?