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Technical and speculative discussion of amps, cables and other topics.


I have concluded that these ac regenerators are the source of the buzzing as follows.

There are two options. Either the ac regenerators:

1. Inject noise into the signal path of the components plugged into them.

2. Affect components in such a way that they themselves buzz.

My conclusions are fairly firm, otherwise I would not have started posting product reviews with such conclusion.

I could make a video for any doubters of the following simple, repeatable test:


CD player and headphones

1. CD player off wall power, paused or no music playing. Simple white noise or no noise at all through the headphones.

2. CD player off PurePower APS, paused or no music playing. Now there is the buzzing noise through the headphones.

I would really call on these companies to correct this "feature". Perhaps it is a method of "sharpening" the sound and making it stand out, but those with headphones and efficient speakers who can hear the "noise dithering" would prefer a neutral sine wave anyway.

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Follow Ups
  • conclusions - Adriel 22:38:06 12/22/09 (0)


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