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Re: An "Absolute Test" for audibility of "Absolute Polarity"

Posted by Srajan Ebaen (R) on March 11, 2007 at 12:57:35

In Reply to: An "Absolute Test" for audibility of "Absolute Polarity" posted by PeAK on March 11, 2007 at 11:53:45:

Going back to Eduardo de Lima's experiments at Audiopax, his contention was and is that, especially with simpler two-way speakers and tube amps, there's a "partial cancellation" mechanism of THD going on that will make one polarity sound better than the other if it is changed at the speaker.

In other words, the polarity that sounds better, in this view, will benefit from even a just minimal reduction in harmonic distortion when certain components thereof , between amp and speaker, are out of phase with each other and thus, cancelled.

De Lima measured the distortion behavior of speakers and SET amps and concluded that they're quite similar. However, as speakers get more complex (three- and more-ways), the math necessary to model this gets very complex.

In short, what you're hearing *could* be because of that "something else" that has nothing to do with the "absolute" kind of polarity but with a reduction in THD -:)

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