Concentric drivers

I cannot recall who was the manufacturer, but I believe it was a builder of large panel speakers who extolled the virtues of law Doppler effect speakers (because of their large radiating surface, panels have quite small excursion, which reduces Doppler effect0. The same would be true of compression drivers and horn loaded drivers.  

This is all new to me....my Tannoys sound great!

“Doppler (intermodulation) distortion would show up as a reduction in clarity at high SPLs, particularly with bass-heavy, complex music.”

@Duke—do you have any experience with this?

@islandmandan 

I think that happens a lot in this hobby. Too many folks looking for the next big thing or coming up with some phantom malady. 

@audiokinesis Said!

Doppler (intermodulation) distortion would show up as a reduction in clarity at high SPLs, particularly with bass-heavy, complex music.

Duke

I agree that’s why my main JBL 2 way speakers have two15’’ woofers.

Mike