Definitive Technology UIW RLS III In-wall multi-purpose speaker with built-in back-box

Enjoy full, natural sound while saving space

I installed Definitive Technology in-wall speakers as part of my home theater, and love the rich detail they deliver with movie soundtracks. The UIW RLS (Reference Line Source) III is among Def Tech’s best in-wall speakers, offering fantastic sound without the footprint of a conventional speaker.

Great for movies and for music

Use this versatile in-waller as a left-, right-, or center-channel speaker in your home theater. Or use a pair as part of a high-end, custom-installed stereo system.

The drivers are specially configured to provide optimal performance whether you mount the speaker vertically or horizontally.

Excellent sound, no matter what’s behind your wall

One of the challenges that in-wall speaker designers face is that they don’t know how much air space is inside your walls (or in other words, how big or small your speaker “cabinet” is).

Definitive Technology has a great solution for this — an airtight, built-in back-box that helps the speaker deliver focused, dynamic sound no matter what space is behind your wall.

The back-box also helps prevent sound from leaking through to an adjacent room, like when you’re watching a movie at night while the kids are asleep.

DIY installation

You can paint the included grille to have your speaker blend in with your room’s décor. If this is a do-it-yourself install, check out our guide to installing in-wall speakers, along with our selection of in-wall speaker wire.