Power Conditioning: How Do You Know You Need It?

Jiminlogansquare,

That is, how do I determine whether the AC coming out of my wall outlets is actually dirty, before dropping two large on a device that I might not actually need?

The equipment to examine the frequency intensity and distribution on your AC lines is relatively expensive and complex. Even if lines are dirty, the end result depends on the ability of your componants power supplies to deal with it. I agree with those above that argue that there are substantial sources of noise within your home that most likely make the investment in power conditioning worth while.

For some systems, dedicated circuits do the job, and for others various power conditioning equipment is adequate. I have found that it is not necessary to spend "two large" on an all out solution. A combination of a dedicated subpanel, dedicated circuits and a used isolation transformer and do an outstanding job for far less.

Take a look at my system for details on this solution.

Hi, and thanks to all who have posted responses; much appreciated. Since making the OP, I have done a little experiment to determine whether I have a noise problem -- practical,not theoretical. Here is what I did. With my playback source on pause,I turned up the volume on my amp (Cambridge 840A v.2) and listened for noise. At -0 db,I could clearly hear some fuzz; but I usually listen at -30dB. At -20 dB, I had to be within 5 feet of a speaker to hear any noise. At -30 db, I couldn't hear any noise even when I pressed my ear directly against the speaker; I think this means I have a 0dB noise floor at my usual listening station ("The Con" is a good 12 feet from the speakers). I am pretty well satisfied that any noise in my system, AC-induced or otherwise, is a theoretical concern, at least with regard to audible interference/background noise on playback. Now, as to effects on soundstaging or other effects impacted by line noise, I suspect there is more to be said. But as far as creating/assuring a dead-black, 0dB background ... I think I'm actually already there. Thoughts?

I would not jump to that conclusion so quickly. First, you have all sources turned off. Second, equipment at rest does not have the same behaviour as when being driven. Third, the interaction between your equipment is not in play. I thought my system was quiet until I put in the iso and dedicated lines. The first time I listened and the music hit a momentary quiet spot, I felt like I was going to fall into the speakers. It was a dramatic change.

For what it is worth, see my post earlier today on the thread entitled:

"Is high end Power Conditioners worth the extra $$$"

Thanks,