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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Maybe it cannot do magicPosted by Antonio J. on: 2/22/2009
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 drdna wrote:


 Antonio J. wrote:
Considering that PP2000 isn't plugged into a dedicated line and that line can be shared by other electric devices plugged into the grid, I wonder if the hum noise is getting into the PP2000 not from the ground wire, but the neutral wire for some defect in other device. Maybe leaving the system on playing music which allows hearing the hum, and making a ride all over the house unplugging electric devices and switching off lights discovers the cause.
This would be disturbing, because this is exactly what the PP2000 is supposed to cure, isn’t it?
....

It is interesting to note that even though there is this buzz, I still consider the PP2000 to be a success. To me the buzz is like the clicks and pops on an old record. It can be annoying at some point, but it does not change what piece was recorded or what musicians were performing it. And overall, the improvement to the ability to deliver the Sound is improved.

Adrian



It's not that easy getting rid of a hum induced in the grid by another device far away, if it's caused for a neutral-ground derivation. I guess the PP centers its efforts in cleaning the active line.
I once lived in a house, in which despite its completely refurbished power lines, breakers and all, it had a strange derivation of 30VAC between neutral and ground. Nothing I tried could cure it, nor seemed the responsible was a device in my house. Funnily enough some devices seemed to be really pissed for it (a CD-R recording machine got fried, and every replacement model they gave me suffered the same fate), others not even humed and others just showed different degrees of hum. I learned to live with it...

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