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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: The Black Gates effect on PP2000Posted by Romy the Cat on: 3/9/2011
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 Lx_ wrote:

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).
Possibly that you are right but it might be something else. My last year unit did inject back to power line a LOT of dirt. I just measured my new fixed unit and I was VERY surprised the it out back to the wall significantly less than older model, In fact what it is full load it outputs back to wall virtually nothing. I made a quick measurement test with how one PP2000 impact another. What the second PP2000 idling it tossed back to the wall huge amount of very nasty shit. As load grow it does it less and less, I use passive load however. When I look at the first unit out what the second one is running I see no evidence on scoop that second unit impact anything.

Sonically however it sound very much like brand new BG caps use. You know that sound when HF feel like coals of 4-5 tweeter and all of them are not time-alighted? The HF are compressed but at the same time infinitely thin, like super sharp balde. I had very same effect from PP2000 3 years back when I exchanged the polarity of hot and neutral at PP2000 input. So, I wonder of possible that Pure Power accidently confused hot and neutral in one of my unit and this give me the ugly BG effect?

BTW, Lxm did you consider to add shunting capacitance to your buttery?

The Cat

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