They are full carbon fiber cones. Hold a light up to front of the sub and look at it from the back side. You can see thru the cone where the fibers are weaved together. I installed 2 of these on 2 p3000.1 amps back in like 2006. They got loud that's for sure. Never metered the system but it was loud. Motors are similar to some very well known motors //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif