The Boschmann EXP-804P is an active subwoofer designed to add deep bass to your vehicle's audio system without sacrificing much cabin space. Its compact under-seat enclosure allows you to tuck it away beneath a chair, making it a practical choice for drivers who want more punch from their music but have limited room for a traditional large box. Powered by a built-in amplifier delivering 600W, this unit features a 200mm driver that handles the low frequencies. To ensure the bass blends seamlessly with your existing speakers, you can use the integrated Low Pass Filter and level adjustment controls, while the phase inversion switch helps align the sound waves based on where the subwoofer is placed in the car.