An electrical circuit model is proposed for a moving-coil loudspeaker. The model integrates the traditional low-frequency Thiele-Small parameters with a structure for modeling the high-frequency acoustic response. A useful simplification occurs if the loudspeaker is assumed to be axisymmetric. The method can be extended to model the enclosure volume and filling, to model driver nonlinearities, and to model first-order diffraction effects from the outside edge of the enclosure.
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