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

Post Subject: Are you a masochis?Posted by Romy the Cat on: 12/22/2011

Ok, Lx, that does makes more sense.

Perhaps I misunderstood you as the impression I got from you was that you recognize some instant events through the PP in reaction to events outside of the PP. THAT is imposable in my view. You did well describe now what you have and now we are in the same page.
PP has the ultimate tool that allows detecting a LOT about its operation. Do you observe the same behavior as you describe when you pull out the power cord and let the unit to run from internal battery?

Whatever problem you have is less likely related to ground. If I was you then I would check if the unit has full profile sinusoid at full load. Use 10:1 probe, any type of analog scope (you can pit it used for $30) and analyze the bottom and top of the curve. The type of sonic problem you describe ideally associated with minor clipping of sine wave. This eats dynamics and subdue phrasing. The most important is that clipping injects huge amount of HF “white” noise deluding all sound with some king of external “gray” pressure. The effect is very common when idiots run 3-8W SET and drive with them 87dB sensitive speakers. They all sound the same – “stuffy” and partially because the clipping in the wave bombard the speakers with 7, 9 and 11 harmonics at very high frequency. I do not know if you have the same effect but from what you describe it would be what I would check first.

I can only say that I do not have this effect and if I did then I would get rid of any devise that produced this effect. I am not sure why you keep your PP if I had the same to what described then my PP would be long gone. Are you some kind of audio-masochist? Of sop then can I sell your contact information to some audio manufactures I know?

I do not think that you will be able to measure signal’s problem, all that you need to is to assure that your unit output proper sinusoid to full load. I do not think that it is “noise comes through PP” and it is most likely not comes through ground. If you have the assurance that you have no Voltage clipping at full power then there is 80% of change that you PP2000 operate properly. If it runs fine from buttery then your amplification and your output filters are fine as well and then you have a legitimate case regarding the PP2000 intuit stage.

The Cat.

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