SPEAKER FILTER Russian patent published in 2023 - IPC H04R3/12 H04R3/14 

FIELD: acoustics, in particular acoustic filters.

SUBSTANCE: filter contains low-low-pass, high-low-pass, mid-pass filters and a high-pass filter. The first input 5 of the filter is connected to the first output of low-frequency range speaker 1, the first outputs of inductor 6, inductor 7, capacitor 8, capacitor 9, capacitor 10 and capacitor 11. The second input 12 of the filter is connected to the second terminals of inductor 13, inductor 14, speaker of the upper-low frequency range 2, capacitor 15, capacitor 16, capacitor 17 and capacitor 18. The second output of low-low frequency range speaker 1 is connected to the first outputs of inductor 19 and inductor 20, the second outputs of inductor 19 and inductor 20 are connected to the first outputs of inductor 13 and inductor 14. The first output of speaker of the upper-low frequency range 2 is connected to the second outputs of inductor 21 and inductor 22, and the first outputs of inductor 21 and inductor 22 are connected to the second outputs of inductor 6 and inductor 7. The first output of midrange speaker 3 is connected to the second outputs of capacitor 8 and capacitor 9. The first terminals of capacitor 15 and capacitor 16 are connected to the second terminals of capacitor 23 and capacitor 24, the first terminals of capacitor 23 and capacitor 24 are connected to the second terminals of capacitor 25 and capacitor 26, and the first terminals of capacitor 25 and capacitor 26 are connected to the second terminal of midrange speaker 3.

EFFECT: increased linearity of the phase-frequency characteristic.

1 cl, 1 dwg