I was not aware of this, John. My understanding was, and it is actually happening, is that if target crosses the measurement then those areas below the target will get even deeper below with neighborhoud regions "helping" this to happen. My listening area is as bad acoustically as it could get, there are spikes and deeps of high magnitude with high Q, so correcting peaks down bring neighbor deeps, which are already down the curve, even more down. I've seen great many times that, when using suggested "...calc target level from response", areas initially at 1-3db below the target become 4-6db or even more below the target. So what I do is I experiment with target level in such a way so that resulting output becomes no worse than 2-3db below the target, however this comes at the expense of having target lower and lower total SPL. Is this a wrong way of doing things? What methodology would you suggest?