This is a professional frequency divider, which is widely installed in the speaker. Playing an important role of the total frequency signal segmentation. Treble, alto and bass 3 way support, helps to separate the mixed audio signal into a treble, alto, bass, and then send to the corresponding treble, mid, bass speaker unit in playback. High quality and free welding. Specifications: Type: 3 Way (Treble, Mid, Bass) Model: PA-3 Frequency Crossover: 600/ 4500Hz Loaded Power: 800W Resistance: 8 Welding: - T for tweeter - M for alto - W for woofer Size: Approx. 150 x 90 x 40mm / 5.9 x 3.5 x 1.6in Package Weight: 500g Circuit board design with precise cutouts and lines, free for welding, very suitable for DIY. Perfect HIFI sound quality: Make the treble clear, enrich the alto effect, and increase the intensity of the bass, freely enjoy clear and natural music. High quality and super durability: wire wound ceramic resistor and high-quality metal film capacitors, ensure its large load power, long-term durability, never burnout. Wide applications: Treble, alto and bass frequency dividing, widely used for 8-12inches speakers. To separate the mixed audio signal into a treble, alto, bass, and then were sent to the corresponding treble, mid, bass speaker unit in playback, resulting in enhance the sound quality purposes. Circuit board design with precise cutouts and lines, free for welding, very suitable for DIY. Perfect HIFI sound quality: Make the treble clear, enrich the alto effect, and increase the intensity of the bass, freely enjoy clear and natural music. High quality and super durability: wire wound ceramic resistor and high-quality metal film capacitors, ensure its large load power, long-term durability, never burnout. Wide applications: Treble, alto and bass frequency dividing, widely used for 8-12inches speakers. To separate the mixed audio signal into a treble, alto, bass, and then were sent to the corresponding treble, mid, bass speaker unit in playback, resulting in enhance the sound quality purposes.