Why Don't We See More High Current Electronics?

Yes- audio equipment does not care what kind of music you play on it.

An amp with a low output impedance does not have a frequency response that varies with a speaker's impedance.

That depends on how the speaker is designed. Take a look at
http://www.atma-sphere.com/papers/paradigm_paper2.html

An excellent example is a Sound Lab ESL, but by no means the only example. You can also run into frequency response variation with highly reactive speakers (high efficiency). You have to look at the intention of the designer of the speaker.

Tvad, I for one would hate to lose you, and your valued balanced contributions to this forum. This particular thread doesn't seem that contentious to me. I do hope you'll reconsider.

03-16-11: Unsound
Tvad, I for one would hate to lose you, and your valued balanced contributions to this forum. This particular thread doesn't seem that contentious to me. I do hope you'll reconsider.

I strongly second these thoughts. Grant, as I indicated earlier I have nothing but the highest respect for your innumerable contributions to this forum, from which I and countless others have benefited greatly. I too very much hope that you will reconsider.

Best regards,
-- Al

Yes- audio equipment does not care what kind of music you play on it.

An amp with a low output impedance does not have a frequency response that varies with a speaker's impedance.

That depends on how the speaker is designed. Take a look at
http://www.atma-sphere.com/papers/paradigm_paper2.html

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Yeah, we've had this discussion before. Same old same old. Lots of assertions, but no supporting data. Negative feedback is bad because it causes time-domain distortion, distortions we can measure aren't important, and high output impedance doesn't really affect frequency response linearity. Frankly Atmasphere, your assertions remind me of Audioquest's argument that skin-effect really does matter at audio frequencies, even though all of the measurements say it's inconsequential.

I think it has been well-said previously in this thread that we don't see more high-current amps because they're very expensive to build, and because most people don't need anywhere near as much power as they think they do at low impedance levels, so very high current amps are mostly for people that have more money than sense (like me).

Tube amps are for people even more skewed towards money than sense. ;-)