Pro 'Burn in' time.

[yabaVR]

...maybe London power isnt great either. I wish it was possible to just hire a proper scientist to do serious measurements at home and clarify whether it's all psychoacoustics or any real environmental causes.

The 200 also fluctuated throughout my ownership so who knows.

For the first point.
Yes the D's are much and I mean very much dependent on the quality of power they get feed of. My D gets a lot to different locations  (it's so handy with the nice bag   ) and the difference in SQ due to the quality of powerlines is quiet astounding. Most times the D performes just the way it ever does but now and then with a slight annoyance of this "digital" textures and if you know how fabulous the D can sound there is no way you can stand those "digital artefacts".

For the third point.
Fluctuating SQ of your D200 is mostly due to quality of power fluctuating throughout 24hours. There may also be some occasions of special events on the powerline when it used to be good for most other days if you live in London.

For the second point.
I don't believe in psychoacoustics for most events they are suggested to be the case of origin.
For me psychoacoustic argumentation is a lame excuse of phenomena that can not be explained and if there was an explanation, it would not fit into the believe system.

I don't think a scientist can help you out because there might be phenomena he can not meassure or if he could his instruments are not precise enough or he just doesn't know of the real functional dependencies. They might not fit into the cage of his books.

Is your believe system that we (or scientist) know everything there is to know and therefor they can conclude about "new" phenomena. Why not stay open minded and accept there might be something else to explore and trust your senses.

What you hear is real. I trust your ears 

gui