Originally posted by bootleg It's actualy very decent. I recently improved my box with some wood flooring under-layment matting. This stuff is like rubber but is cotton and is ****ing great. My Pyramid amp is again a PB580 pushing a Volfenhag 12" dual voice coil competition sub wired to do dual 4 ohm operation. This morning I drove up to a friend of mine who has a sony something with something like 800 watts, same as I, pushing two 12" JL something subs. Mine kicked the **** out of his for 30 minutes at 119 decibles. I think that amp has proven itself to me.