1.good quality with good sound 2.high performance speaker 3.good heart for v.c. 4.coaxial speaker 5.mylar dome tweeter

  CX4020:    4"  2-way Coaxial Speaker

1.Butyl rubber surround

2.Injection PP cone woofer

3.28mm mylar dome Tweeter

4.1"(25.4mm)Kapton voice coil

5.Power rating: 20 watts

6.Frequency response:  100-20KHz

7.Impedance: 4 ohms •Sensitivity:  86dB/m/w

4 inch coxial car speaker