A high accurate and efficient digitally direct driven speaker system for 1 kW applications for an electrical machine system

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The aim of this research is improving the power efficiency of a high power loud-speaker system. In order to improve the power efficiency, a digitally direct driven speaker system technology (DDDSP) is applied to the high power system. Increasing number of actuators (ACT), output power and sound presser level can be increased. Decreasing number of ACT during low output power, the low power efficiency can be improved. High power system with 80% power-efficiency and 100 dB of SNR, whose output power is 0.1 to 1 kW, has been realized.