Seismic Audio - Quake15_4_Ohm - 15" Raw Woofer Speaker Driver PRO AUDIO PA DJ Replacement - 4 Ohm Model #: Seismic Audio - Quake 15 (4 Ohm) 15" Woofer/Speaker 50oz Magnet with 2.5" voice coil 200 Watts RMS, 400 Watts Peak Impedance: 4 Ohms