This sturdy pre-construction enclosure is designed to be mounted before drywall is hung. It's constructed from high-grade cold-rolled steel and filled with a layer of insulation, and it installs behind each speaker location to prevent sound from bleeding through the ceiling.
The enclosure is easy to install, houses the speaker quite well. Easy to wire the speaker while inside the product, it's lightweight and holds the speaker quite flush to the ceiling. The fact that it's fire rated seals the deal.