Does power: 40/20/10/5 W / 8 o 8 inch coaxial shook her head high; Does the input voltage: 100 v / 70 v; Does frequency response: 90-20 KHZ; Does the sensitivity: 87 db; Does the material: iron; Does the weight (kg) : 3.1; Does appearance size (mm) : 270 * 190; Hole size (mm) : 240;