CVHD''s powered subwoofer offers the power and the capacity to deliver the low frequency drama that you would expect from Cerwin-Vega Bass. This beefy 12 inch power subwoofer has the size and air volume to offer the low frequency range for full impact and drama on music, movies, and games. The CVHD sub offers a frequnecy response compariable to subs on the market that are much more expensive...and offer a great value.