Quiet Solution makes a variety of products designed to keep your home theater room quiet – both inside and out – such as QuietRock drywall panels and QuietWood for floors and the like. Now you can even soundproof the door in your home theater with the company’s QuietHome doors, which are about as heavy and dense as a door you might find on one of the Egyptian pyramids (of course, they didn’t have hinges then). The door ships pre-hung, and the frame includes a foam-like gasket that seals the door when it’s closed. There’s also a gasket the seals the bottom of the door against the threshold. A 2.25” THX certified version is available for $1,995. The 1.75” non-certified version is $1,499, which the company says is up to 50% less than other acoustic doors.