Basket:Steel
Cone:PP Cone With Rubber Edge

Size: 4" 2 Way
Voice Coil: 0. 75"
Magnet : 5 oz
Tweeter:1.2" Polyester
RMS Power: 50W
MAX Power: 100W
Nominal Impedance: 4 Ohm 
Frequency Response: 100Hz~18KHz
Sensitivity: 90dB