| 摘要 |
PURPOSE:To simplify the network circuit of a speaker system by connecting a capacitor to the input edge of an induction type speaker for high area which forms a high-pass filter with the inductance of a feeding coil and internal resistance. CONSTITUTION:When a capacitor 5 is connected to an induction type speaker 1 for high area, such a condition goes to be equivalent to a case that the high- pass filter to be composed of the inductance of the feeding coil and the internal resistance and the high-pass filter to be composed of the capacitance of the capacitor 5 and the internal resistance of the coil are serially connected. Accordingly, when the cut-off frequencies of the two filters are made equal, the two high-pass filters to be serially connected are arranged in the front step of the speaker 1 for high area. Thus, the high-pass filter of a sharp characteristic can be formed. Then, when the speaker system is formed by the plural speakers, the network circuit can be simplified. |
