1. The American EC polypropylene capacitor is a fever-grade audio-specific capacitor, a of capacitor specially designed for audio, with high sound resolution, excellent low-frequency performance, bouncing power, and extraordinary cohesion. Transparent, low loss, it is a fever 2. The fever-grade American EC capacitor has low loss, strong anti-interference performance, small internal temperature rise and excellent flame-retardant performance, which is a strong for high-quality frequency dividers 3. American PTFE coupling antique film audio capacitors have strong stability, low loss, and high resolution 4. The sound quality improvement tool is made of high-quality materials, the mid-bass speaker in the car can be adjusted to divide the frequency divider, and the details are more distinct and prominent. It is a DIY tool for car enthusiasts to improve sound quality 5. Frosted bottom plate The black bottom plate treated by frosting process is not easy to leave fingerprints or traces, and is beautiful and generous. Filter characteristics: single channel frequency division Frequency response: 50Hz~600Hz power: 200W Weight: 181g Applicable impedance: 4~8 ohms Scope of application: sound quality upgrade and modification of car mid-bass speakers Colour:black Material:plastic Size: 120 x 65 x 33.5mm Package Contents: 2 x frequency divider 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.