Okay, time for a quick recap ...
I'm satisfied I've got the combination of NAD CD player and integrated amplifier, and simple Sharp shelf speakers over the first hurdle: if enough care is used to control the electrical environment around it then it conjures, very nicely. At the moment I'm playing a EMI 1964 opera CD, lovely full rich sound that expands as far anyone could want, with the speakers totally "invisible" - and the same goes for a real roughie, like the original Rolling Stones London album, played yesterday; the sound completely lifts out of the speakers.
But, I've got fixed volume, so to speak - I still haven't resolved the final solution for this, which will require trying at least one better quality potentiometer - on the To Do list. And, as I've experienced over and over again, external and possibly mutual electrical interference are problematic, the "good stuff" is only wrought when all sorts of "silly" fudges are organised for the electrical items in the house - this is a pain(!), and must be properly sorted by adding filtering and shielding as appropriate. Plus, the fixed volume I'm using is not pushing the amplifier into areas where it is substantially stressed - will the quality sustain for continuously elevated levels, like modern, heavily compressed pop?
What is very significant, is that from cold turn on the sound is highly competent, very little warm up time, if any, is necessary for satisfying replay to be had - and, almost no component substitution has been done so far: no electrolytic capacitors replaced, no swapping of other passive, and active parts done; not even the power supplies have been touched. So, there is plenty of manouvering room to enhance quality further - this is an excellent sign, the potential appears to be there for some impressive reproduction capability ...
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