Rockford Fosgate Punch 10" 300-Watt Powered Truck Enclosure P30010TThe Punch 300 10T is a self contained subwoofer enclosure with built in amplifier. This "all in one" solution is great for systems that need extra Punch on the low end of the frequency spectrum. The 10" high output subwoofer is impedance optimized for the built in 300 watt class D amplifier that features a low pass crossover, bass EQ and phase switch. The enclosure can be connected via speaker level inputs for connection to factory systems, or