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RE: PPP impact over upper-mids and high frequencies

Posted by skytag (A) on June 20, 2007 at 15:02:43

In Reply to: RE: PPP impact over upper-mids and high frequencies posted by PaulMC on June 18, 2007 at 07:26:42:

"One thought that occurs to me is that it may be something akin to a turntable or CD transport and their feedback."

This makes no sense to me. A turntable's raison d'être is to convert physical vibration into sound. It uses a component specifically designed and built to detect the most minute physical vibrations and convert them to electromagnetic signals. There is nothing equivalent in an AC regenerator or any other electronic device such as a CD player. If the physical vibration experienced by a PPP or CD player could have an effect as significant as you describe, then iPods and car audio systems would be incapable of producing music, as those systems are subjected to infinitely greater vibrations than those experienced by audio equipment in a home environment unless you have your subwoofer pointed at the rest of your audio gear.

I think it's much more likely a subjective difference in perception, or some other factor entirely. Room acoustics make a huge difference in sound, and I suspect that any difference in your listening position, where someone else is standing in the room, even the difference in room acoustics caused by putting a PPP on a shelf versus the carpet would have more affect on the audio in a system than the physical vibration of the PPP unit itself.

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