Direct-radiator loudspeaker systems with high BI

In an extension of an earlier paper by the authors additional consequences of a dramatic increase in the motor strength Bl of a driver are shown. Not only is the efficiency of the loudspeaker and amplifier greatly increased, but high Bl values have a positive influence on other aspects of loudspeaker systems. Box volume can be reduced significantly and other parameters can be altered. A prototype driver unit is studied, which performs well in a small sealed box. Vented systems do not benefit as much from high Bl.