As for concentric drivers, they are actually separate drivers with a crossover so the movement of the woofer will not affect the tweeter only the other frequencies it carries.
Showing 2 responses by mijostyn
@islandmandan , doppler distortion is very real. Most of us have had the experience of a driver leaning on the horn as the car passes us. Right as the car shifts from coming at us to going away from us the horn changes pitch. This is very noticeable. The same thing happens with drivers that are handling the lowest frequencies. To produce low bass drivers have to take long excursions, coming at you then going away. This will cause a change in pitch of the higher frequencies the driver is handling as the driver changes direction. If you can see the cone or diaphragm move this is happening. Woofers that cross over at lower frequencies cause much less trouble than full range drivers. Better yet you can protect the entire speaker by using sub woofers to handle the longer more problematic excursions isolating the speaker from this effect. It is also true that larger drivers do not have to move as far to produce the same volume of bass causing less distortion. I use full range electrostatic speakers and the difference between subs and no subs is not arguable. Even lewm would hear it:-) |