KEF is keeping the momentum going. Just in the past month, the company launched the CODA W wireless speakers, introduced new finishes on its Blade Meta loudspeakers, and even updated its portable Muo Bluetooth speaker. Now they’re back with something for the custom installation crowd: two new in-wall speakers designed for home theaters and multipurpose living spaces — the Ci3120QLM-THX and Ci5120QLM-THX.

These aren’t your everyday wall speakers. They’re part of KEF’s “Extreme Home Theater” range, a lineup that aims to bring high-performance sound into rooms where traditional speakers might not fit — or where the aesthetic calls for a clean, uncluttered look.

One of the key talking points with these speakers is their THX certification. If you’ve ever seen the THX logo at the beginning of a movie, you’ve felt the power of their standards. But the certification isn’t just for show; it’s based on strict testing for things like output capability, frequency response, and distortion.

Here’s what that means in practice:

• The Ci3120QLM-THX is THX Certified Select, meaning it’s tuned for medium-sized rooms — think standard living rooms or mid-sized theater setups.
• The Ci5120QLM-THX is rated THX Certified Ultra, which makes it better suited for bigger spaces where you need more output without losing clarity.

So whether you’re planning a cozy media room or a full-blown home theater, there’s an option tailored for your setup.

Both new models lean on KEF’s signature Uni-Q driver array — their unique take on a coaxial speaker. In plain terms, it's designed so that the tweeter sits right in the middle of the midrange, helping spread sound evenly throughout the room. This approach can help keep sound consistent, even if you're sitting off to the side.

These speakers also use KEF’s Metamaterial Absorption Technology, or MAT. It’s a bit like acoustic plumbing: a 3D-printed labyrinth behind the tweeter that absorbs unwanted sound. That means cleaner treble and less mucking up of the midrange.

Backing the Uni-Q are custom 4.75-inch bass drivers. The Ci3120QLM-THX uses two of them, while the larger Ci5120QLM-THX uses four. KEF also includes some less-obvious engineering touches like a Flexible Decoupling Chassis (meant to reduce cabinet vibration) and a tweeter gap damper that helps keep high-frequency performance under control.

All of this sits under a 3-way crossover system, which helps each driver stick to the frequency range it’s best at.

If you’ve ever looked at in-wall speakers and thought, “Why does it still look like a speaker?”, KEF has tried to address that too. Both new models feature an Ultra-Thin Bezel design that keeps the visible edge around the speakers minimal. Plus, the metal grilles attach magnetically and can be painted to match your décor.

Both speakers are also IP64-rated — meaning they’re resistant to dust and splashes — so you can install them in more places than a typical drywall environment. Think open kitchen walls or rooms where things sometimes get messy.

One note: these speakers aren’t designed to be DIY-friendly. They’re intended for flush-mount, professional installation. If you’re building or renovating, though, this could be an interesting option — especially if you're trying to keep electronics out of sight.

KEF’s new Ci3120QLM-THX and Ci5120QLM-THX round out the company’s already strong architectural lineup. With THX certification, thoughtful acoustic engineering, and minimalist designs, they offer a way to bring better sound into your space without visible hardware.

If you’re planning a home theater or media space and want serious sound that blends into the background, these might be worth a look — just make sure you’ve got someone on hand who knows their way around a wall saw.

KEF Ci5120QLM-THX vs. Ci3120QLM-THX Specifications

Here’s where things land:

• Ci3120QLM-THX: $1,299.99 each
• Ci5120QLM-THX: $1,699.99 each

They're available directly from KEF and its authorized dealers.

While that pricing places them firmly in the premium tier—competing with brands like DALI and Monitor Audio, yet still under Focal’s in-wall models—KEF’s long history in architectural audio may offer buyers and installers an added level of confidence.

Read more:

• 9 In-Wall Speakers I’d Actually Trust in My Own Walls (From $199 to $1,999)
• Ceiling‑Secret Sound: The 8 Best In‑Ceiling Speakers I'd Actually Buy in 2025
• Monitor Audio’s New In-Wall Monsters Are Built for Bass and Built to Disappear
• Focal’s New Utopia Cinema Promises Blockbuster Sound—At a Blockbuster Price