FOUR-BAND FILTER FOR ACOUSTIC SYSTEM Russian patent published in 2022 - IPC H04R3/12 

FIELD: acoustics.

SUBSTANCE: invention relates to acoustics. The filter for a four-band speaker system contains a low-pass filter LC filter, a low-mid-pass LC filter, a mid-pass filter and a high-pass LC filter, the outputs of which are intended for connecting dynamic heads of the low-frequency, low-mid-frequency, mid-frequency and high-frequency ranges, respectively, while the first input of the four-band filter is connected to the first terminal of the first capacitor and the first terminal of the first inductor, the latter is connected by its second terminal to the first terminal of the low-midrange dynamic head, the first terminal of the low-frequency range dynamic head and the first terminal of the second capacitor, the second terminal of the first capacitor is connected to the first terminal of the third capacitor, the first terminal of the second inductor and the second terminal of the low-frequency range dynamic head, the second capacitor the second output is connected to the first output of the fourth capacitor, the first output of the third inductor and the second output of the low-frequency dynamic head, the second output of the fourth capacitor is connected to the first output of the midrange dynamic head, which is connected by the second output to the first output of the fifth capacitor and to the first output of the sixth capacitor, the second output of the second inductor is connected to the second the output of the third inductor, the second output of the fifth capacitor and to the second input of the four-band filter, the sixth capacitor is connected by its second terminal to the first terminal of the dynamic head of the high-frequency range, which is connected by the second terminal to the second terminal of the third capacitor, while the first, second and third inductors have an equal inductance value, the first, fourth and fifth capacitors have an equal capacitance value, and the capacitance the third capacitor is equal to the capacitance of the sixth capacitor.

EFFECT: simplifying the design, increasing the linearity of the phase-frequency characteristic of the filter while maintaining the uniformity of its amplitude-frequency characteristic.

1 cl, 1 dwg