Seismic Audio Richter-8-Pair Pair of 8-Inch Raw Woofers Speaker Drivers Pro Audio PA DJ Replacements - 175-Watt RMS Model Number: Richter 8 (Pair) Power Rating: 175 Watts RMS - 350 Watts Peak each Type: 10" Woofers/Loudspeakers Nominal Impedance: 8 Ohm Frequency Range: 65 Hz-5KHz