SKN: 2447J   ...Brand New Genuine JBL 2447J High Frequency Driver. 16 ohm, 1.5" bolt on throat, 4" edgewound voice coil, 100 watts continuous above 500 Hz, 150 watts continuous above 1 kHz,  500-20,000 Hz. If you have this driver and only need the replacement diaphragm for repair, then you need the D16R2450 or Aftermarket Diaphragm.