What's a reasonable listening position response curve?

Theory is great, but we should be considering what's achievable in our listening rooms.

I agree a flat line response would be magnificent, but I doubt it's even achievable in a room. 

I'm interested in what others have been able to acheive and I'd love to see their graphs.

My feeling is that digital EQ is not even worth considering if you are serious about music and a graphic equlaizer is superior, although it generally only has 31 bands, so it's somewhat limited in what can be achieved.

I only have Audyssey and it might give a smoother frequency response, but I find the SQ isn't as good.

I found this graph on An Inconvenient Truth About Room Acoustics (The Myth Of The Flat Frequency Response) and likely to be typical of a high end system.

Too true. I was looking more at the ripples of the overall frequency response as a way to understand acceptable variations.

Even if we accept 110% is used as an alternative to "absolutely 100%" the statement is wrong as sound quality is far more than just frequency response.

I also don't agree with the statement maximum tolerable variance is at most +/- 0.05dB, and I would go .01 just to be sure. Might be good with amplifiers, but not for speakers and certainly not for listening position.

From our favourite protagonist/antagonist? Wind him up and he nuts you.

Maximum is maximum and it makes no different if the control has 10, 11 or even 12 positions.