Feature●Nominal Impedance: 8 ohm./ Voice Coil Diameter: 44mm (1.75")●Power Handling: 75 Watts●Frequency Response : 1200-18k hz●This Is Brand New Aftermarket B52 Replacement DiaphragmDescription This Is Brand New Aftermarket B52 Professional Comp-4DMX replaced diaphragm for all B-52 MX Series cabinets, such as : MX1515, MX 15 and MX-MN 15.