Does power: 30/15/7.5/3.8 W / 8 o 6 inch coaxial shook her head high; Does the input voltage: 100 v / 70 v; Does frequency response: 100-20 KHZ; Does the sensitivity: 87 db; Does the material: iron; Does the weight (kg) : 2.2; Does appearance size (mm) : 230 * 155; Hole size (mm) : 200;