I have one of these in a sealed box. It was the only regular sub that would fit in my 96 ranger, anything else would have had to be a shallow mount sub, and this is just the best. It hits so hard, I showed a friend of mine who was a car audio installer for 10+ years, and he was amazed at the excursion on it. It hits hard, it hits clean, and running it with an Alpine MRP M350, it fills the space of my truck very well. When I crank it up, it blurs my vision. Not too damn bad for a single 10". Has to be the best value sub on the market. Alpine all the way.