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RobHolt said:Agreed, But aren't you curious to look at why there might be a difference ? I wasn't joking when I said that removing the case from the Accuphase made no difference. In the case of my pre amp it is unusable without it's steel case and sounds worse - but with good reason- the case greatly reduces the intrusion of RFI into the circuit.
The DNM comparison is interesting as his pre amp (and I beleiive hs power amps) are pretty bandwidth limited and less likely to suffer RFI problems.
Another phono stage I used a few years ago, from a designer firmly in the non ferrous camp, was so prone to RFI that it was laughable. Ultra wideband, high gain curcuit in a largely metal free case....... you see my point?
There are forces at work here, perfectly easy to measure and explain forces and there are others which require a degree of belief
IMO, the screw issue goes firmly into the belief camp.
I think this is a good discussion and well worth having but preferably not now within this NVA thread given Richard's recent threat. It's also a little off topic by now![]()
I can assure it is not a threat! Anyone who wishes to continue with the discussion within this thread is quite welcome, including those who completely dissagree with me. But this virtual world is subject to the same rules and consequences as the real world. Commit slander as you have now done on more than one occasion in this thread and you take your consequences. I have never been concerned with people who dissagree with me. I object to those who have to resort to ad hominem as with the kid with the guitar, and I definitely will not accept unwarranted slander.
TonyL has got it about right and I couldn't do more than advice people to follow his thoughts if you wish to hear this effect. I am not sure who originated the work on non metalic cases, I think DNM and ourselves were working on parrallel lines about the same time in the early to mid 80's. I don't know of anyone prior to that. How does this happen, well you just need an open mind, where you always say "could be" instead of "can't". There are no absolutes in this world and the current state of the art leaves masses of possibilities.
Richard