PA commercia in-ceiling speakers with a rear cover is specifically designed for use in commercial audio systems. The speakers are coming with a 70v/100v transformer inside, while the 70v/100v transmission is realized in a high-voltage, low-current mode, which makes longer distance transmission and parallel connection of multiple loudspeakers possible.

The rear cover on these speakers is an added feature that provides additional protection and support for the speaker. The cover is typically made of a sturdy material such as steel or aluminum or high durable ABS plastic, and is designed to protect the speaker from damage due to dust, debris, fire or accidental impact.

The speakers are commonly used in settings such as retail stores, restaurants, hotels, and offices. They can be used to provide background music, paging systems, or public address systems.