The JBL L 8400 P is a powered subwoofer that is designed to deliver deep bass response and enhance the overall audio experience in home theater and music systems. It features a built-in amplifier that provides sufficient power to drive the internal woofer, allowing for clear and impactful low frequencies. The subwoofer is constructed with quality materials to ensure durability and reliability. It often comes with adjustable controls for volume, crossover frequency, and phase settings, allowing users to fine-tune performance based on their specific room acoustics. The L 8400 P is compatible with various audio systems and can be connected through standard RCA inputs. The design typically reflects JBL's aesthetic sensibilities, which merge functionality with visual appeal. The enclosure is engineered to minimize resonance and distortion, enhancing overall sound fidelity.