1. The frequency divider of the subwoofer is the frequency divider of the box. Its function is to divide the total frequency signal from the power amplifier, to block the signal above the middle and low frequency, and to let the bass, subwoofer, and subwoofer pass through. 2. The material is sufficient, the inductor adopts 1.2 wire diameter oxygen-free copper large inductor, DC-LINK high withstand voltage high current capacitor and high frequency ceramic high power circuit with heat dissipation resistance. 3. The frequency divider blocks the signals above the middle and low frequencies, leaving only the real bass part, which makes the human voice feel very small and makes the bass stand out to compensate for the lack of bass of the speaker. 4. The general frequency divider uses a 5MM long inductor. In order to let the low frequency signal pass through quickly, this case uses a 6MM large inductor and a 5MM thick inductor in series, and the two inductors are far away, so as to reduce heat generation and quickly dissipate heat. The crossover is more stable in operation. Product Description: Model: 92 Filter: Pure Bass Power: 400W Frequency response: 48Hz Impedance: 4-8 Applicable: Bass, subwoofer modification and upgrade size: 160 x 95mm Material: plastic colour: As shown Package Contents: 2 x Bass crossover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.