The JBL BassPro Micro is an ultra-compact powered subwoofer system that achieves jaw-dropping bass performance hard to believe for its size. The 140-watt RMS Class D amplifier and proprietary subwoofer combination delivers 100dB at 10 feet! The subwoofer enclosure is docked to the permanent amplifier base but detaches in just seconds providing extra cargo space when needed. The BassPro Micro includes speaker-level and line-level inputs that easily connect to the cars existing audio system. There are also controls for input sensitivity, crossover frequency, phase and a bass EQ with 9dB of boost.