Rockford Fosgate PS-8 8" 150W RMS Underseat Powered Car Stereo Audio Subwoofer The amplifier is optimized to produce high output power while minimizing the impact on the vehicles charging and electrical system An included remote bass level control allows you to fine tune the output of the subwoofer from the drivers seat Our Industrial grade vinyl covering gives the enclosure as sleek look while also protecting it from outside objects Short circuit, thermal, and reverse polarity protection. Crossover Controls : Variable 50Hz to 120Hz at 12dB/Octave Butterworth Quick Disconnect power and signal connections