So, in light of Keith and Feri's last posts, I'm going to give my last calibration with results and what I've done since talking to the CS rep at Onkyo. In the last calibration I set the gain to about 2 o'clock, ran the full 2EQ calibration and the sub's level came in at +11.5dB. It obviously sounded imbalanced with too much bass. I then turned the trim level down to about +7.5dB and it sounded better, but it still had too much bass. This morning I called Onkyo and right after making my post on here I turned the trim level down to +3.5dB and the sub's gain down to 12 o'clock. I've only listened to some music (CDs), but it sounds EXCELLENT! There is a seamless blending of the sub and the mains ,center, & surrounds, with just the right amount of bass. Granted, I'm going by my ears in forming this conclusion.
Did my turning down the trim level and sub gain negate my last calibration (in other words, did my actions negate the goal of Audyssey, which is to "achieve 85dB SPL in the LFE channel)? And just as important, am I in danger of experiencing the same thing that Keith did (see post above) when he had distortion during loud bass scenes, which turned out to be clipping that eventually ruined his sub? Of course, in asking this last question it seems that Keith did not adjust his trim levels (he left them on +10dB), so *maybe* if he had lowered them the clipping, distortion and ruining of his sub wouldn't have taken place.
I'm betraying my ignorance in asking these questions (I've been told countless times that "ignorance is not stupidity, so feel free to ask questions to your heart's content"), but I really want to know the truth so I can act on it. Keith and Feri seem to in disagreement on some issues and I want to be able to digest what they're both saying and try to arrive at the truth...and then apply it.
Yes, Feri and I disagree on this. But I am the one who ran his AVR at +10dB and destroyed a sub because of it. Following Feri's line of thinking +10dB ought to be fine, but I know from experience it isn't. I can only tell you what I believe to be true - the sub trim should ideally be well clear of the maximum 'end stops'.