KEF Muo review: Excellent sound, premium price

KEF is best known for its high-end home audio gear, but it’s taking another swing at the portable space with the updated Muo. This time around, it promises an outdoor-ready design with “high-fidelity sound that stuns,” which is a bold claim for something this size and price. So, can it really pull double duty between your living room and your next trip to the beach? Let’s find out in this KEF Muo review.

Editor’s note: This is the first version of the article. Updates will follow as the market changes.

What’s it like to use the KEF Muo?

The KEF Muo leans into a sleek, minimalist design, and it shows the second you unbox it. It looks right at home on a shelf or coffee table, rather than something you might find in a dorm room. You can use the speaker horizontally or stand it vertically, making it easy to fit into different spaces around the house, from your desk to the kitchen counter.

With an IP67 rating and an included lanyard, the KEF Muo is also ready for your next adventure. It’s fairly portable at 740g, especially compared to something like the JBL Charge 6 at 988g, and its slim shape slides easily into a backpack or that side water bottle pocket when you’re heading out.

You get physical controls that sit along the top of the speaker; however, the buttons aren’t backlit and can be hard to distinguish by touch, so using them in darker settings can take some getting used to. Overall, KEF offers a solid set of features in a sleek package, including a built-in microphone for calls and support for audio over USB-C, which adds some flexibility beyond Bluetooth. You can also pair two Muo speakers together for a true wireless stereo setup.

What are the key features of the KEF Muo?

The KEF Muo works with the KEF Connect app, but getting started takes a bit more effort than expected. You’ll need to create an account before you can use it, and the app asks for details like your age and gender. You can choose “prefer not to say,” but it still feels like more information than necessary for a simple speaker companion app.

Once you’re in, the app itself is pretty barebones, but that’s not always a bad thing. You get a handful of EQ presets like Desk, Dialogue, and Extra bass, but there’s no custom EQ, which feels like a missed opportunity at this price.

That said, it covers the basics well. You can check battery life, adjust volume, and even power the speaker on or off directly from the app, which is genuinely useful. You can also switch between Bluetooth and USB-C audio right from the app, which makes it easy to jump between wireless and wired listening.

How does the KEF Muo connect?

The KEF Muo connects to your device wirelessly via Bluetooth 5.4, with support for aptX Adaptive, AAC, and SBC codecs, or plug in with USB-C for a wired connection.

Just keep in mind, to actually use aptX Adaptive, you’ll need a compatible Android device. Otherwise, it defaults to AAC or SBC. Pairing is also quick with Google Fast Pair and Microsoft Swift Pair, and you can link two Muo speakers for true wireless stereo or connect multiple units via Auracast.

How long does the KEF Muo’s battery last?

KEF states that the Muo can last up to 24 hours on a single charge, but that’s at “moderate volumes.” I like to test a little louder, playing a consistent stream of music at 80dB measured from 1 meter away to better reflect real-world listening.

Under those conditions, the KEF Muo lasted 11 hours and 39 minutes, which is a solid result at this level. That’s easily a full day of listening on a single charge, and a good reminder that battery life will always depend on factors like how loud you have your speaker and what type of content you’re playing.

How does the KEF Muo sound?

Reviewer’s notes

Editor’s note: this review uses a hover-enabled glossary to describe sound quality based on a consensus vocabulary. You can read about it here.

How would most people rate the sound from 1 to 5?

The chart below shows how the sound of the KEF Muo was assessed using the Multi-Dimensional Audio Quality Score (MDAQS) algorithm from HEAD acoustics.

The KEF Muo earns a Timbre score of 3.3, a Distortion score of 3.3, and an Immersiveness score of 1.9, for an Overall score of 3.0.

These results reflect how the speaker would sound to a group of about 200 listeners, rather than a single user in a controlled setting. The strong Timbre score lines up with its balanced tuning, while the Distortion score shows it keeps things relatively clean at typical listening levels.

The lower Immersiveness score isn’t surprising. The Muo is a mono speaker, and MDAQS favors stereo setups when it comes to spatial presentation. KEF designed the Muo with stereo pairing in mind, so using two units would likely improve that score. Even with that limitation, an Overall score of 3.0 is a solid result for a portable Bluetooth speaker, especially one focused on a compact, single-speaker design.

Can you use the KEF Muo for phone calls?

Yes, you can use the KEF Muo for phone calls. It includes a built-in microphone with noise and echo cancellation, which aims to allow voices to come through clearly on both ends. That said, like most portable speakers, it works best in quieter environments. It’s handy for quick calls at home or outside, but I wouldn’t rely on it in really noisy settings.

Should you buy the KEF Muo?

The KEF Muo makes sense if you want a portable speaker that looks as good in your living room as it does outside. It delivers excellent sound quality with good clarity and enough bass strength for personal listening or small groups, and its slim design makes it easy to take with you. If you want a portable speaker that sounds excellent right out of the box, it’s a strong option. You also get useful extras, such as USB-C audio, stereo pairing, and a built-in microphone.

That said, at $250, it faces some tough competition. You can find speakers that get louder or offer more features for less money, even if they don’t match the same design. If you value a sleek look and a more refined listening experience in a portable form factor, the Muo is worth considering. If you just want the most power for your dollar, there are better options.

What should you get instead of the KEF Muo?

If the KEF Muo is out of your price range, the Bose SoundLink Flex (2nd Gen) ($149 at Amazon) is a strong alternative that still offers a sleek design that won’t look out of place around the house while keeping a more affordable, outdoor-ready build. You still get a built-in microphone for calls, support for aptX, and Bose adds a 3-band EQ, something the Muo lacks with its preset-only approach. It’s also often on sale, which means you can sometimes pick up two and run them in stereo for around the price of a single KEF Muo.

If you prefer something more robust for your next outing, consider the JBL Charge 6 ($199.95 at Amazon). At $199, and often on sale for less, it delivers up to 45W of output, solid bass strength for its size, and a customizable 7-band EQ so you can fine-tune the sound to your liking.

Otherwise, for even more options, be sure to check out our list of the best Bluetooth speakers you can buy right now.

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