SPECIFICATION Mode DSP904 DSP906 DSP211(Subwoofer) Full-range Speaker / HF Driver 6.5"x1 8"x1 8"x1 Normal Power 6W 10W 20W Max Power 12W 20W 40W Line Voltage 70-100V 70-100V 70-100V Sensitivity(1m,1W) 91dB 92dB 92dB MaxSound Pressure Level(1m) 97dB 100dB 102dB Freq. Resp. 200-14,000Hz 80-15,600Hz 50-300Hz Dimensions 115x210mm 180x280mm 180x280mm Hole for Mounting 192x196mm 245x280mm 245x250mm