Acoustic Audio's new top of the line High Definition Series subwoofers are sure to please both music and movie lovers alike with their combination of elegant cabinet design, solid construction, and powerful performance. This HD Certified sub delivers detailed, accurate bass thanks to its built-in digital drive amplifier which produces 400 watts RMS to 800 watts of power. Its precisely crafted cabinet features a traditional black finish and a 12" Kevlar cone woofer with rubber surround. Its digitally tuned rear slot port extends low-frequency response, reduces distortion, and increases its power handling capability and efficiency by 30%. The adjustable gain control and continuously variable low-pass crossover lets you tailor the sound to the rest of your speakers.