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That's virtually impossible..Something had to be wrong with either

with the 989s or the measurements.Just the laws of physics doesn't permit what Mr Kessler was saying..There are three types of speakers that are considered the worlds fastest loudspeakers...It has always been common knowledge that ESLS are the fastest speakers with the lowest distortion just by the fact that the diaphragm is so light and is driven at the perimeter to where there is no drag coefficient to speak of that will come into play.ESLs also have very few crossover components unless it's a multi panel speaker like my CLXs and even those are using two toroid audio transformers .There isn't too much in the signal path and even my old ML Monolith 2s,I used to drive direct with the Citation 2 amps but had an input R/C network rolling it off at 100cps and I let the powered subs do the rest.

The next ones are the planar magnetics like Apogee and Magnepans.Those also have the speed by nature of design of the quasi-ribbon and the way that magnets move the ultra light diaphragm from the outer edges like the ESL does.

Last but not least would be compression field coil drivers.Those babies are wicked fast with low distortion and also have the dynamics along with the price..YIKES.

I would be curious as to know the method Ken Kessler used to measure the distortion in the B&W and Quad speakers and how he arrived at the measurements..I find it hard to believe that a conventional speaker with several crossover points and conventional cone drivers would measure lower distortion than either an ESL or Planar Magnetic for that matter.

Now I realize that distortion doesn't tell the whole story and many tines doesn't mean much.. Just saying.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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