... professional polyimide speaker compression driver 1.44mm aluminium voice coil 2.Max power:120w/8Ohm 3.1" horn SE250 ... 120W professional polyimide speaker compression driver120W continuous program power ... Superior speaker and amplifier, top technology and quality.3) Certificate: CE,RoHS,GS,SGS,ISO9001 4) ... . SE250 120W professional polyimide speaker compression driver