WEAH-305 3 Way Audio Speaker Crossover Circuit Treble Midrange Bass Module Frequency Divider Home Loudspeaker Filter Refit Accessory. Features hollow core inductor with high heat dissipation, special capacitor for imported audio, and CBB sound capacitor. Suitable for 4-11 inch speakers below 150W. Adopt over current protection device for long service life. High temperature resistant inductor and 41mm frame inductor adopted and fixed with cable ties to prevent co-vibration of music.