The Alpine SPS-609 Car Subwoofer set, in a 6 by 9 inch package, provides real powerful bass to your car audio . The 3-way Alpine subwoofer can crank out high volumes with an amplifier, having a nominal power output of 85 Watt RMS and a peak power handling of 260 Watt RMS. With a frequency response range of 65 Hz to 23 kHz, this Alpine subwoofer lets you can enjoy all the lows and mids in your car audio collection. A sensitivity of 90 dB provides the Alpine SPS-609 Car Subwoofer set with great clarity and minimal distortion at all volumes.