Originally Posted by mthomas47
You are very welcome! The app wouldn't be able to help with the problem that you are describing. It allows users to make some adjustments, after the fact, to the frequency response; and it allows users to limit the frequency response to be EQed. But, the Audyssey program, working in conjunction with your AVR, sets crossovers based on what the Audyssey microphone "hears".
Based on your description, it sounds to me as if your Audyssey microphone is not functioning correctly. I would buy a replacement microphone and try that. Replacement microphones can be found on Amazon. The color doesn't matter, as the mics are generic. Just make sure that you are matching the same general type of microphone, such as the tower type that points up. I believe that there is an example listed in the Audyssey FAQ, linked in my signature.
Thank you for your analysis and recommendations. After I submitted my post on Saturday I ended-up listening to quite a bit of music, mostly 2-channel, but a bit of 5.1, too, some heavy bass, some not so much, and watched a movie. Despite the cross-over settings, I thought it sounded pretty good with all cross-overs set manually to 80. I found myself wondering if the front channels were really being rolled-off below 250. The next morning I ran a shake and rattle sweep and 2-channel test tones from just above 250 to below 80, with a Radio Shack SPL metre. The levels went up and down a bit, but seemed pretty consistent the whole way. Maybe, I'm measuring the wrong thing, or something.
Anyway, after that I read your reply to my post, suggesting that the mic that came with the 8500 was faulty, and decided to try re-running Audyssey with the mic from my 3808, they are both tower types. Had been thinking about doing it, anyway, as the sub had ended-up at -10.5 and it seemed like the conventional wisdom was to have it more -5.
I started the calibration with the old mic plugged in, went to the sub level matching part of it and discovered that Audyssey was asking me lower the sub's gain more then it had before, -20 now being roughly equal to -14 from before. I backed out, plugged the 8500's mic in and ran it again, it's results were the same as it had always been. Backed out again, plugged in the mic from the 3808, and ran a full calibration. The results for the cross-overs were FR 150, C 80, S 40, SB 150, FH 40. That looks familiar and may be close to what I used to get with the 3808 (no FH, of course). I hadn't specifically been noticing the channel trims with the previous times running the calibration, but think the ones this time were less extreme.
With this last calibration the 8500 probably sounds more like my old 3808 than it had before. Also, the FH speakers blended in better and are substantially less harsh then before, I have still found myself turning them off, but less often.
With my previous calibrations of the 8500 I had always ended-up with critical listening levels of -10 to -5 for movies and -20 to -10 for music, which was similar to what it was with the 3808. This time I'm heading more into the 0.0 range for movies/TV, and similar increase for music.
Today I finally had a chance to look at the Audyssey FAQ, it said that the mic that came with the 3808 is not compatible with the 8500. I'm not sure what not compatible means here, obviously it did work with the program.