The RECOIL SL1789 is an 8 inch slim amplified underseat active subwoofer designed to add deep, accurate bass without taking up too much space. With 550W max power, 250W RMS, two built-in passive radiators, RCA and speaker-level inputs, remote bass control, and compact dimensions of 330 x 237 x 78mm, it is ideal for vans, SUVs, convertibles and pickups. An installation wiring kit is also included for easier fitting.