Power: 100-120W/F, 20W/C. 20W/S Impedance: 4ohm Sensitivity: 86db±3db/F, 82db±3db/C and S Driver unit: 1"x2+5"+6. 5"x2/F, 1"+3"x2/C, 1"+3"/S Materials: trial-board by spray piano, side by PVC