AIYIMA 25/20/15W Audio Speaker 40/44/50MM Full Range Loudspeaker Resonance Sound Exciter Super Bass Neodymium Portable

The horn is full Ranger, the bass is very strong, the equivalent of traditional loudspeaker 4 inch bass effect, with the other with the size of the traditional speakers, bass is strong, big power. The end of the e with red mark for the positive, connect the audio e, with amplifier is ok. 40MM Power:15W Resonant Freq(FO):80Hz Freq Response:80Hz-20KHz Sensitivity:86db±3db Voice Coil Size:25.5mm Horn Diameter:40mm Height:24mm Net Weight:106g 44MM Power:20W Resonant Freq(FO):70Hz Freq Response:70Hz-20KHz Sensitivity:86db±3db Horn Diameter:44mm Voice Coil Size:25.5mm Height:30.5mm Net Weight:199g 50mm Power:4 ohm 25W/8 ohm 20W Resonant Freq(FO):60Hz Freq Response:60Hz-20KHz Sensitivity:86db±3db Horn Diameter:50mm Voice Coil Size:28mm Height:30.5mm Net Weight:268g Package included: 1PC speaker