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Earbuds & In-Ear Headphones

To the Muon: KEF Mu3 True Wireless Earphones

Competitively priced little gray wireless earbuds aim to standout with their ergonomics and sound quality.

Woman wearing KEF Mu3 silver wireless earphones

Acclaimed UK loudspeaker manufacturer KEF is extending the company’s product line into the in-ear headphone space with a new entrant. Today the company announced the KEF Mu3 True Wireless earphones with built-in active noise cancellation (ANC) for $229.

KEF Mu3 wireless earphones silver pair with case
KEF MUON loudspeaker with Ross Lovegrove
KEF MUON loudspeakers ($224,999/pair) with Ross Lovegrove (front and back views)

The KEF Mu3 earphones were designed in collaboration with Ross Lovegrove, the designer behind the MUON loudspeaker and the MUO Bluetooth speaker, who’s renowned for his innovative approach and flowing, sculptural forms. With each subsequent product by Lovegrove, the company has dropped a letter. In that vein, it seems that the Mu3 follows suit and adds a three to signify the third product in collaboration with Lovegrove. What’s better for potential customers is the Mu3 is nearly 1/1000 the price of the flagship MUON loudspeaker.

KEF Mu3 True Wireless Earphones Side view

KEF claims the Mu3 deliver the signature sound the company is known for. KEF describes the sound as, “exceptionally dynamic and well balanced, coherent sound with rich midrange, detailed bass and crisp high tones.”

Each earphone contains an 8.2mm full-range dynamic driver, expertly tuned by KEF’s UK engineering team. Bluetooth 5.0 handles the wireless duties, and audio performance is further enhanced by the introduction of simultaneous transmission. That’s where both earphones receive a signal at the same time, rather than the more common approach where audio is sent to one earpiece and relayed to the other and therefore running the risk of latency.

KEF Mu3 wireless earphones in open charging case

KEF’s Mu3 earphones include specially tuned Active Noise Cancellation technology that claims to eliminate external noise without affecting the details of the music. Alternatively, Ambient Mode disengages ANC and use the microphones to amplify sounds around you. This is a both a safety feature and a quick way to hear the world around you when you need it.

KEF built the Mu3 earbuds with ergonomics and comfort in mind. Each earbud is said to be perfectly balanced in the ears by smart weighting, which stops them from falling out. They are available with a choice of four subtly different sized ear tips to ensure a tight seal for noise isolation and a secure fit. With rugged IPX5 splash-proof protection Mu3 should withstand the elements, and if they fit as good as they say, could be good for workouts.

KEF Mu3 True Wireless Earphones Bottom

The KEF Mu3 have high-capacity, quick-charge batteries that return one hour of use time after just 5 minutes charging. On a full charge, KEF says they’ll last up to 9 hours.


  • Active Noise Cancellation tuned to eliminate external sound while preserving nuance and detail
  • 8.2mm full-range dynamic driver engineered to reveal the smallest details of your favourite music
  • Bluetooth 5.0 for exceptionally stable connections with both iOS and Android devices
  • Ergonomic design for comfort and fit
  • IPX5 splash-proof design for all weather conditions
  • Up to 24-hours use (9 hours at full charge; plus 15 hours with charging case)
  • Fast charging of 5 mins for 1-hour use
  • 4 sets of ultra-soft silicone ear tips for optimal comfort and fit (large, medium, small, short)

In the Box

  • Mu3 Noise Cancelling True Wireless Earphones
  • Charging case with built-in wireless charging
  • USB-C charging cable
  • 4 sets of silicone ear tips
  • Quick start guide, warranty
KEF Mu3 wireless earphones in case charging

Price & Availability

The Mu3 earphones are available in Silver and retail for $229.99.

Learn more at:


Speaker drivers8.2mm 
Frequency range20-20000Hz 
Sensitivity104dB/1mW at 1KHz (1KHz 1mW) 
Max power output5mW 
CodecSBC, AAC 
Bluetooth Power≤13dBm 
Bluetooth range10m 
Bluetooth frequency2.402GHz-2.48GHz 
Li-ion rechargeable battery50mAh (earbud)/ 350mAh (charging case) 
Battery play time (earbud)9 hrs (BT + ANC on) 
Battery play time (charging case)15 hrs 
Fast charging for 5 mins1 hr battery play time 
Dimension (H x W x D) 24.5 x 17.5 x 26.3 mm (earbud) 33.5 x 62 x 52 mm (charging case) 
Weight 5.8 g (earbud)
46.8 g (charging case) 
Operating temperature-10°C to 45°C
Power InputDC 5V 600mA 
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