JPS58182597U - speaker device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional example, FIG. 2 is a graph showing f characteristics to explain the drawbacks of the conventional method, FIG. 3 is a circuit diagram showing an embodiment of the present invention, and FIG. FIG. 5 is a circuit diagram showing another embodiment of the present invention, FIG. 6 is a circuit diagram showing the example circuit of FIG. 3 at a specific frequency, and FIG. FIG. 7 is a graph showing the f characteristic of the example shown in FIG. 1...Transformer, 1a...-Next winding, 1
b...Secondary winding, 3, 4...Voice coil, C...Capacitance, INl, IN
2...Signal input terminal.

Claims (1)

[Scope of utility model registration request] The electric speaker includes a plurality of voice coils wound around a single voice coil bobbin and electrically connected in series, and a transformer is provided between the series connection point of the plurality of voice coils and the signal input terminal. A series resonant circuit including a series circuit of a primary winding and a capacitance is connected, the resonant frequency of the series resonant circuit is set to be approximately equal to the lowest resonant frequency of the electrodynamic speaker, and the primary A speaker device comprising a secondary winding having a polarity opposite to that of the winding and connected between one end of the plurality of voice coils and the signal input end.