Originally Posted by beastaudio
I am a bit confused on the bi-amp situation you are doing right now too. you are using 4 channels of amplification coming from the FL/FR of the marantz, into a 4 channel amp and two +/- wires going to each speaker with one for the mids and one for the highs? It certainly sounds to me as well that the mids are not either getting the proper wattage to operate fully compared to the highs. If the amp doesn't have separate gain adjustments, this would certainly be the case as the highs probably take 1/10th of the power to operate at appropriate listening levels as the mids/woofers do. feeding them both the same amount of power at the same gain level would be exactly what you are seeing.
Man, I like this thread, SBIR is all to often not even mentioned when properly calibrating systems
Good points sir, I learned the effects of SBIR after way too late in my initial journey
In reference to this and your above quote, I will expound on how I take Audyssey's results. First off, it sets my subs a good 10-15dB lower than they should be to match the rest of the system, and it does it every time. A cheap radioShack SPL meter is your best friend. Quite possibly the best $40 I spent on my theater so I can go and see where Audyssey missed some very important things.
Dynamic EQ will only accentuate the surround mix, and the low freqs when listening below reference to help make the sound appear more "full" when not cranking the system to higher listening levels. My guess here is it is helping your already anemic sub system that was set incorrectly to bring it back to where it needs to be, but is still inaccurate. SO on to my post Audyssey regiment:
1) go in and adjust crossover points, my rears I know are not capable to 40hz, so I bump it up a shade to prevent damaging the speakers. Mains are set as full range but IN MY ROOM my system measures better when they are set to 100hz so I do that. YMMV
2) Confirm that the speaker distances look to be correct on all channels, which Audyssey does a much better job at this part.
3)and most important, I take my RS Spl meter and make sure that all the levels are matched at 75dB (or the standard 72 that your 8801 probably has them close to minus the sub channel)
4) If on any of the speakers your post Audyssey results show a -12 on the meter, as has been said, Audyssey could not EQ as it felt the level was too high and left it out. If you have any of these in your setup after a test, either move the mic further away from the MLP (not always the best idea), adjust the gains on the amp down so post Audyssey results show the majority of your speakers are at 0-0dB +/- 5dB or so, or if you don't have gain adjustments on your amp, then look into getting some RCA line attenuators from PE:
The whole part about Audyssey reading your mains as reversed polarity could either be side wall reflections being too prominent in the frequency response or your overall delay coming from your front stage to the mic but I would guess the former. Side wall absorbtion/diffusion would be advisable, but before that try adjusting the toe-in of your mains to see if this helps.