Specification： Model T-671 T-672 T-673 T-674 T-675 Input Power 6W 15W 30W 60W 100W Control Mode Transformer Signal Input 70~100V Signal Output 0~100V Speaker Type Voltage Speaker Frequency Response 80Hz-16KHz Step 11 Steps Finish PC, white Mounting Size 80 x 80 x 60mm Dimension 86.7 x 86.7 x 67.5mm Weight 0.14Kg 0.20Kg 0.20Kg 0.20Kg 0.22Kg Accessory One pair screw of M4 x 25