DESC: The current EL line of amplified Bazooka subwoofers, features everything you need to take your factory or high powered head unit system to the next level. The Bazooka EL series represents SAS's continued commitment to efficiency and design. Bazooka Amplified Bass Tube EL6AHP features patented bass tubes enclosure, high efficiency bass output, space saving compact design, internal 18dB electronic crossover, quick connect wiring, moisture resistant enclosure and woofer. Inputs are summed mono internally.