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RE: This has nothing to do with acoustic power

The idea is that if an amplifier has no feedback and a high output impedance, it becomes a power source rather than a voltage source.

SETs are an example of this, as are Nelson Pass's First Watt amplifiers.

Speakers that are designed around the Power Paradigm include all ESLs, nearly all horns (except the Avantgarde Trio), 'full range' single-driver speakers, and a good number of bass reflex and acoustic suspension speakers (Coincident Technology is a good example).

Note that the impedance curves are not flat- that is not a requirement of the Power Paradigm. What is happening here is that the Power Paradigm is saying that distortion products are a greater source of coloration than frequency response is. However it is possible to take advantage of the amplifier characteristic in speaker design, some of Duke LeJeurne's (Audiokinesis) designs are examples of that.

IOW, this is a fairly large portion of the high end market, where that not the case, there would not be the equipment matching conversation that is everywhere in high end audio.

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