Question Protection Mode

helloall

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These questions bug me for a while....does someone have any thought?

I had an ARCAM AVR connected to a BOSE 5.1 The unit was later replaced with a new one due to fault (yes, ARCAM was that good). When I ran room EQ with the new unit for the first time, the LFE test signal created an unusual loud noise and the AVR shut down. I lowered the volume control on the subwoofer a bit and re-ran room EQ. Everything was fine. I never had a single problem in the few years afterwards.

Questions:
- Why was the loud noise created? I didn't encounter such an issue with the old AVR.
- For LFE, the AVR pre-out to the subwoofer and the power amp of the AVR was not used. Why did protection mode kick in on the AVR?
- The auto-EQ set the LFE volume at +7. This was probably larger than the small adjustment I made on the subwoofer to lower its volume. But I didn't get any problem playing loud movies. Why was that?

Very curious...thanks...
 
Last edited:
I unplugged the AVR360 today to change to an aftermarket power cord. Something strange happened afterwards:

1. I use an OPPO to play some movies from a hard disk. Now when I stop a movie, the AVR360 will automatically mute, as if I clicked the mute button on the remote.

This sounds a good feature but I never experience it?? Is it what the AVR750 owners mention that the AVR goes into mute when it detects a silent note/change in codec?

2. The ARC function seems to work all in sudden. The TV and AVR did not talk to each other beforehand.

And I have never updated any firmware
 
Arcam gremlins - you will go mad trying to work out the vagaries of Arcam kit that defy rational explanation
 

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