Small loudspeakers with low force factors (Bl) behave as narrow bandwidth filters with high quality factors and can be tuned at low resonance frequencies. It is possible to optimize low frequency reproduction (in the “sub-woofer” range) using a number of such drivers. This study employs a set of such low-Bl loudspeakers with different eigenfrequencies to achieve efficient reproduction of low frequency signals and examines aspects of such implementation comparing the results to an ideal sub-woofer system and also via perceptual evaluation of these systems.
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