The Pioneer TS-WX400DA is a compact active powered subwoofer engineered to add controlled low-frequency output where space is limited. It pairs a small enclosure with an integrated amplifier to deliver bass without requiring a separate amp and large box.

Built for tight fitment the unit supports both line-level and high-level inputs for connection to factory or aftermarket head units and offers adjustable level and crossover controls to integrate with existing systems. Installation is suitable for underseat or trunk mounting depending on vehicle layout.