Pioneer presents another Class D subwoofer with integrated digital bass control. This unique feature offers two selectable bass modes: Deep and Dynamic, producing 250 watts of rich, thick, deep, and palpable bass without taking up much space in your vehicle. Users can easily control the two bass modes directly via the included wired remote control. The TS-WX400DA can be conveniently mounted under the front seats or in the trunk. Thanks to the integrated Class D technology, the TS-WX400DA from Pioneer is even easier to install, as it has both speaker and RCA line inputs. This means you can connect it directly to your existing audio system for a simple and quick upgrade. The TS-WX400DA is a compact active subwoofer in a sealed enclosure with a maximum power of 250 W and a continuous power of 100 W.