Concentric drivers

Do concentric drivers have Doppler issues?


For most speakers today,  doppler is not a real problem.  It does exist and can be measured.  It would most accurately be described as FREQUENCY Intermodulation distortion.  When drivers are used and ran over a very large frequency the drivers move at very different rates and that causes the doppler effect.  As drivers have improved,  natural crossover points in 2 way designs has lowered overall and most 3 way plus designs have never had real issues.  Of course, there are always exceptions, but overall, Frequency intermodulation distortion is not an issue in todays speakers.