Powerbass ASA3-200.2 100W 2 Channel Amplifier Defeatable Lighted PowerBass Badge switches the lighted PowerBass logo on or off MOSFET Power Supply for the most efficient and distortion free sound reproduction Variable 12 dB, High/Low Pass Electronic Crossover for infinite system applications Variable Bass EQ that lets you get the most out of your subwoofers Optional Remote Level Control gives the listener the option of turning the subwoofers up or down