So of course I am clearly a novice on this stuff. Tell me more about the specific protection you are talking about. I am familiar with a AVR shutdown due to excessive heat, that makes sense. What other “protections” might come into play here? And is it the AVR protecting itself due to its own internal failure? Could there be something going on with my new sub that could be triggering any of this?
you mentioned “speakers/distances/eq from them/amp”. My sub sits right behind my entertainment system on the floor and has good ventilation. My two bookshelves sit on shelves in the entertainment unit, and have fairly good ventilation (could be better) but so far they have not shown any issue. As for my test last night, after I turned off the sub the avr did not shut down again. As for my sub settings on the back panel, believe both knobs (gain and low pass filter) are both set to about 75%. And even if I turn these down to 50% still many shows and movies are so bass heavy that there is lots of vibration going on even at modest avr volume.