This is answered in the Audyssey FAQ:
6. Is it possible to save and recall an Audyssey MultEQ calibration? (click here)
Bingo! Thanks Keith.
Sorry to hear of this unusual problem. 'Fraid I can't shed any useful light on it, but the reset procedure below should set the unit back to factory defaults - ie it should wipe everything including the level and trim distances.
RESET Onkyo to Factory
To reset the AV receiver to its factory defaults, turn it on and, while holding down the [VCR/DVR] button on the unit, press the [ON/STANDBY] button on the unit. "Clear" will appear on the display and the AV receiver will enter Standby mode. On turn on, it will have been reset to the factory defaults.
Is that the procedure you were using? It is important to press the relevant buttons on the unit itself not on the remote control. Prior to doing the reset, it might be useful to unplug the unit from the wall for 5 minutes and then do the reset procedure.
It is most odd that the system measures well but sounds so different to the measurements. How can that be? I hope someone can shed some light on it for you. Good luck.
Are you thinking, as I am now, that when you perform a new calibration it is not overwriting the old calibration? Can you verify that in some way - maybe by running a quick 3 position calibration with the sub or main speakers moved to a different location so that you can verify if the distance setting actually changes? If the calibration is indeed 'sticking' then it may be something that requires the unit to be returned for service. I hope not, but cannot think of a reason why the settings are not properly reset when you use the correct reset procedure.
However, this might all be a red herring - the real issue is 'what happened to the bass?'. I can't understand how it can measure OK but sound so different. When you do the measurements, you presumably turn Audyssey off - do you still have this lack of bass without Audyssey engaged when listening to normal sources? If the bass is lacking even with Audyssey turned off, does the calibration reset really matter?
I am just thinking out loud really. When the USA wakes up in an hour or two, hopefully some of the other guys on here can give some ideas that might lead to a solution. Meanwhile I share your frustration.
Very weird. Measuring the line output will be useful though.
Yeah - they don't understand what the Audyssey target curve is it seems - and how DEQ works. The "woofer moves air" test is totally conclusive really - if the woofer is causing barely a rustle, no matter what anyone says, there is something wrong for sure.
Sorry I can think of anything positive to suggest. I will follow the progress of your search for a solution with interest. Never heard of anything like this before.