critical mass ul12.

CRITICAL MASS UL12 - THE ULTIMATE SUBWOOFER. At only 18 lbs, this subwoofer handles up-to 3. Times more power, has a considerably higher linear and maximum excursion, and audibly lower distortion, while weighing as much as 66% less than other Ultra-Performance Subwoofer (woofers with an excursion capability of greater than 2.5). (Sealed) Weight: 23.6 lbs Motor Type: Dual Gap / Internal NEO Magnet Voice Coil Type: Ultra-High Temp Dual Coil (Made in the USA) Voice Coil Diameter: 4 Voice Coil Impedance: 1.5 ohm nominal per coil Xmax (one-way linear excursion): 36 mm (3 peak-to-peak) Maximum Excursion (one way): 46 mm (Almost 4 peak-to-peak) Sensitivity: 96.7 db (2.83V / 1m) (coils in parallel) Fs (Klipple-LSI): 31 Hz Qts (Klipple-LSI): 0.81 Vas (Klipple-LSI): 47.7 Liters. JL Audio W7 W6 W3 or any Woofer for that matter do not come close to this SUB