Didn't Phillips do something like this back in the 70's? Motion feedback
or some such daft name?

I think they called it 'David', it was a motion feedback woofer in a
powered-speaker
form factor. This kind of system can control the low frequency
behavior
of the cone very accurately. Mossbauer apparatus uses the same
hardware for motion control with .01% distortion, but that's a
linear-motion
measurement, no idea what the air movement effectiveness is.


OK, both. Don't remember the Philips system, but then the company that I was
working for back then, didn't do much with Philips. Still, that sounds like
the sort of system. Those specs for the Mossbauer are impressive. I guess
that's the sort of thing that it's going to be, given the claimed value of
these things. I've just been listening to a CD through them. They sound
nice, and very smooth with a very flat and stiff sounding bass. Quite easy
on the old lug-holes, but I'm not sure that I would rate them as 16 grand
more easy than my home-built EMI 13 x 8 cabs from the 70's ... :-)


Arfa