LCR notch filter: Many novice friends are not familiar with traps. Let me introduce it first: 1. Why use LCR correction network trap? The flatness of the frequency response curve is one of the most important and direct indicators affecting the correctness of the sound. The function of the trap LCR network is to balance the local peak of the mid-frequency or mid-high frequency of the speaker frequency response curve, maintain a reasonable flatness, and keep the sound at a better level. In terms of specific listening experience, it attenuates the peak of the mid-high frequency part, and the overall tone is more balanced. Special note that the trap is to fine-tune the tone. The higher the level of the matching equipment, the more the difference can be reflected. It may not be obvious on programs with ordinary sound quality and low-end amplifiers. Is the trap filter necessary? Not necessary. It attenuates the treble. Friends who like brighter treble do not need the trap filter. Friends who are not demanding can choose not to use the trap filter. In fact, based on cost and technical level considerations, traditional mid-to-low-end full-range speakers do not have this design. We have tested that good speakers with trap filters can improve the sound effect to a higher level. Is the trap correction network a crossover? Many friends think that the addition of a full-range speaker unit is a crossover. Rigorous manufacturers add an external network just to change the parameters in a good direction to obtain the correct sound. As for the crossover, its core is division. The LCR correction network is connected in series in the circuit, and there is no extra speaker. There is nothing to divide, so it is not a crossover. Is this notch filter suitable for various speakers? Strictly speaking, the notch filter should be determined after debugging based on the effect