Specifications: 
Essential parameter 
Clarion diameter  1.5" (38 mm) 
Nominal impedance  4 or 8 Ohm 
Power capacity  30 W RMS
Sensitivity (1W/1m )  97 dB 
Frequency range  2,000 – 20,000 Hz 
Voice coil diameter  1" (25.4 mm) 
Flux density (Tesla)  1.2T
Magnet dimension & Class Φ70mm×10mm / Y30
Materials 
Magnet material  Ferrite
Voice coil material  Copper Clad Aluminium
Voice coil former  Kapton
Diaphragm material  Titanium
Encasement information 
N.W./G.W 0.52 Kg
Meas/QTY 54×22×25 / 40 PCS.