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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Ground loops?Posted by manisandher on: 7/13/2012
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 Romy the Cat wrote:
You claim that it was “everything plugged” syndrome but I was writing about it years back and I thought that it was what you were doing. Even if you did not then in my view the superbly positive contribution of PP was still very observable…
Well I can pretty much replicate the sound I was getting last year - simply have the DAC and power amps plugged into the PP and the PC plugged into the wall socket.  The sound becomes brighter, thinner and more edgy. This is eliminated immediately by switching to battery and taking the power cord out of the PP. This effect is consistent and repeatable - I tried many, many times to be sure. I suspect that some sort of ground loop is introduced via the USB cable linking the PC to the DAC when the PC is connected to the wall socket, but who knows.

 Romy the Cat wrote:
Were you able to upgrade your PP2000 to PP3000+ or you just got another unit? If you have both of them then it would be very interesting to hear your comments about Sound of PP vs. PP+.
I will have both a PP+3000 (for my main system) and a PP2000 (for my study/office system). Yes, I'll certainly compare the two a report back.

Mani.

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