A short update, not much has happened, but a couple of items to be noted ...
A nuisance, hopefully doesn't deteriorate more, but the NAD CD player now often is down the right channel at switch on from cold - takes some minutes of playing before it suddenly comes on line, or starts crackling and buzzing before steadily working itself fully back to stable sound. To me, this is an active component part playing up, not liking to get out of bed in the morning - once in its stride, no audible artifacts from then on in the listening, etc.
No matter how much one is aware of the fact that little things that matter, it is still easy to make mistakes! I normally carefully route all cabling, everywhere, for minimum possible interference effects to occur. But ... the speakers are mounted on flat, large slabs of MDF, to somewhat stabilise them in their very temporary location while the system is being fiddled with ... and, I had cabling, etc sitting across these boards. To cut to the chase, the vibration the speakers were transmitting to these boards was causing too much movement in the materials of these bits and pieces - the sound was being negatively affected! Tidy this up - problem solved ...
I have computer networking in the same room, no wireless, just ethernet - and it connected up and functional still causes audible interference ... I need to make the isolation and shielding yet more robust. Unfortunately, complete isolating this or any other audio system electrically from any external noise making gear is a real headache, there are no easy answers that I have found - one needs to keep plugging away until all the "gaps" are closed, for optimum sound.
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