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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: I am not surprisedPosted by Lx_ on: 3/9/2011
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 Romy the Cat wrote:
So, what the concussion is. It is known that PP2000, as any switching devise, inject a lot of noise into power line from where it sources power. Apparently the PP2000 own filtration can’t handle the noise from the second PP2000. That sucks.

Well, this is consistent with the behavior I have. I can hear electrical devices behind the PP, especially those of the switching PS type: computer screen, laptop charger, DSL box, printer, SAT decoder... Good luck finding electronic equipment without one of those these days. Also the PS for the PC I use as digital front-end, which is probably the noisiest of all (not in a good way, as you can imagine). No wonder the PP bleeds through another PP. Yes, that sucks and this is not what I expected from the unit.

If you find a way to properly isolate PP output from input-borne AC noise, let us know. APS may be interested too.

For the moment I turn off all devices during serious listening sessions (not so hard using power strips with switches).

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