Replacement QSC 18″ 1000-Watt 8 Ohms Sub Woofer Speaker For QSC HPR181 Series
Impedance: 8 ohms. DC Resistance (Re): 5.6 ohms. Diaphragm Mass Inc. Airload (Mms): 177.8g. Moving Mass Of Diaphragm (Mmd): 150.8. Frequency Response: 30 to 2,500 Hz. # Mounting Holes: 8. Depth: 8.07".