HD-800CF - CDT Audio 8" Carbon Fiber Cone Cast Alloy Audiophile Versabox Subwoofer HD800CF HD-800CF - CDT Audio 8" Carbon Fiber Cone Cast Alloy Audiophile Versabox Subwoofer 1 e/a 8 Cast Carbon Fiber Subwoofer Frequency response 10Hz-400Hz Magnet weight: 25 Oz Mounting depth: 3.69