Thanks
@TLS Guy .
I did check all the speaker wiring for shorts. Like I mentioned in the post, I've infact plugged in an alternate receiver into the same spot and have been watching movies fine (including Atmos w/4 Height channels (B&W)). I had also measured the resistance of the speakers from the AVR end , via the wiring..,as well the 9v test , all at the AVR end of wiring. It'd become visible, with these tests, if there were a short?
You're right, I just measured the resistance using multimeter, not the impedence w/AC.
Both the times the AVR went to protection mode, when powering up, with no "active" load from speakers.
This is an existing setup I've been running for few years now ..,with the AVR pre-outs to the PowerAmp for 5 channels(FR,FL,Center, Side Surrounds), leaving the AVR to handle the Surround back & 4 Height channels.
The D&M repair guy says FRONT LEFT , which actually goes through Emotiva Amp..while the loud pop I heard from REAR LEFT HEIGHT. Confusing diagnostics.
Do you recommend any alternate meter/mechanism to test ?