1. Using high-quality materials and ensuring product quality 2. Choosing it can make your audio details outstanding and the sense of hierarchy more distinct and prominent 3. Using a 41mm large skeleton inductor and fixed with ties to prevent music from colliding 4. Use hollow core inductors for high heat dissipation 5. Wide application range, suitable for speakers ranging from 4 to 11 inches up to 150W. 6. Type B - Mid tone slightly louder Filtering characteristics: 1 high, 1 medium, and 1 low Power: 150W Impedance: 4-8 ohms Applicable horn: 4-11 inches Frequency division point: medium high 4000Hz/medium low 9000Hz Center hole spacing: 75 x 52mm Color: As Shown Material: PCB Package Contents: 1 * Module 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.