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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: Maybe my unit is performing correctlyPosted by Lx_ on: 1/20/2011

Those recent posts of yours are making me wonder whether my PP2000 unit is really faulty, as PurePower acknowledged on this very forum. After all, you are starting to recognize that PP is sensitive to incoming electricity in your own units. This makes several cases where we have strong suspicion (if not actually convinced already) that wall electricity still has an impact on Sound, even though PP is supposed to filter it.

In my case, difference in Sound is not outstanding, but once you know what to listen for, you can easily say when Sound is fine (no appliance on) or not. Also, I have appliances drawing several kW, and this leads to a reduction in dynamics, as well as adds micro-level noise that makes timbres a little less accurate and phrasing tends to disappear. Overall Sound is a bit more dull.

Could each of you tell me if they are using dedicated AC line to feed their PP? If not, can you hear a difference in sound when 1-2 kW are drawn by appliances in your house (typically heaters at this time of year)?

It was kind of funny to see you report excellent electricity in the snow those past few days. Last Saturday, I also experienced excellent electricity in my system. I was so hooked that I delayed having dinner for about an hour. I was wondering what did change in the system, when of course I knew I had changed nothing. I thought sound would improve with the system still warming up and the evening coming (I usually have better sound in the evening, be it for better electricity or less outside noise, I do not know), but eventually sound came back to what I am used to.

This episode of fantastic electricity gave me excellent dynamics and oooh, so good phrasing. It reminded me of the recent test I did when running on battery. Now that test was very short, because my battery is now almost 2 years old and cannot hold longer than 10-15 minutes, so I cannot be certain. But if PP on battery is indeed as good as fantastic electricity, it means that at least PP does not add noise to incoming AC. This is new for me, I suspected the charging (or some other) stage might leak into output. Of course it also means the PP is useless in case of fantastic electricity (which almost never happens for me). Now PP filtering should be improved so that input noise is removed and output sounds as on battery or with fantastic electricity.

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