1.Nominal Impedance 8±15% at 1.0V 400Hz2.Resonance Freguency 110Hz±24Hz at 1.0V3.Frequency Range F0----------20k Hz4. Sound Pressure Level 86db/W(1m) ±2db AVEat 300,400,500,600 Hz5.Buzz And Rattle 7.74V (rms)6.Rated Input 15W (10.9V)7.Maximum Input 20W (12.6V)