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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Well, it is a bit more coplex and perhabs simplier.….Posted by Romy the Cat on: 6/7/2014
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 miab wrote:
I have not seen it mentioned but I might of missed it. The PurePower absolutely demands shielded interconnects especially between preamp and amp in my experience. No matter how careful I route the cables, I was getting noise or buzzing from the speakers. Exactly as described by many on the net. Only shielded cables were successful to stop this. This is with a Placette passive. On my second system with Purepower, the ground lift on my Placette active sorted the noise out to absolute silence with proper care in routing wires. I just mention this in case others need ideas in diagnosing buzzing that I so often hear of.

Miab,

this is a bit more complicated that this in my view. First of all I need to admit that I do not believe to people who claim that Purepower produces noise. My units are completely silent and I know other people who have completely silent Purepowers. I have no doubts that the people who report noise do have nose but I attribute the nose to their lock of competence to deal with ground loops. There is another issue – no matter now inapt Purepower folks are and how negligent their assembly and testing I do not think that they can do anything that would make the unit to have the noise while it maintaining in and out grounds and while producing proper wave.

Now, you introduce the notion that Purepower people let say forget to put some kind of shield on pulse coil and some other negligence and it made the unit to be literally radioactive, spreading EMI all over itself. If it was the case then routing of cable would produce auditable result but no one reported it. Years back I had (very stupidly and very sort time) Purepower sitting in my rock with no top cover. It did make the while sushi to sound very hard and impolite but I had no noise. I do not saying that cable routing is unimportant. It is important and it is auditable but not at level of noise but at level of headless of sound. The people who report nose at -20dB hosen report very load nose that sound to me like pure ground loop and not EMI. To inflict -20dB EMI noise the Purepower unit shall have half of kilo plutonium inside….

So, even I do appreciate your experience but I do personally do not think that the shielding is the key.

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