crossover Advantages and Features: 1. Audio-specific anti-interference high-power high-current high-voltage double 50uF large capacitor. Filters treble, midrange and low frequency above 290Hz 2. The anti-interference 0.22uF capacitor filters self-excitation and howling in the audio. 3. Inductance length is close to 8cm, inductance is 4.8mH, using 1.57mm high temperature enameled wire. 4. Designed for a gain of 12dB, capable of withstanding approximately 1500W power. 5. Upper limit frequency range is about 260Hz to 290Hz. Features: 1. High current switch adjustable around 30Hz. Large inductance provides powerful bass response. 2. Uses PCB fireproof board with thick copper base and increased tin plating for smooth high current flow. 3. Gold-plated solder terminals offer a premium look, easy connection, fine craftsmanship, and reliable performance. 4. Anti-vibration foot pads provide stable installation. Model: -89 Power: 1500W Applicable Impedance: 4~8 ohms Upper Limit Frequency: 290Hz Size: 117 x 95 x 56mm Material: PCB Color: Package Contents: 1 x Bass Crossover