For its 60th anniversary celebrations, KEF could have kept things relatively simple. It could have done the hi-fi equivalent of getting a few friends over for drinks, nibbles and maybe a couple of glasses of fizz. It could have built a new passive speaker to mark the occasion and nobody would have objected.
What KEF’s actually done is go into full-on party mode, hiring a venue, getting the private caterers in and paying for a live band to keep us dancing into the early hours. In hi-fi terms it has decided to launch one of its most challenging products to date, the LS60 Wireless, a floorstanding sibling to its fantastic LS50 Wireless II all-in-one hi-fi system.
But the KEF LS60 Wireless isn’t just towers based on the bookshelf version. That description just doesn’t do it justice. As you can see from the pictures and as you’re about to learn, the company has thrown so much at the LS60 that it’s on a whole different level, both in terms of engineering and sound quality.
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Active floorstanders: KEF LS60 Wireless
(Image credit: Future)
A combination of cleverly positioned cardboard surrounds and plastic clips means you can unbox the KEF LS60 Wireless in just a few minutes. It’s at this point you’ll be transfixed by what is one of the most impressive-looking pair of speakers we’ve seen this year.
There’s so much going on with the KEF LS60 Wireless from a design standpoint that it’s difficult to know where to start. But we’ll try. The first thing that strikes you is the cabinets are extraordinarily slim. Excluding the plinths, each tower measures just 13cm across. When you consider the LS50 Wireless II standmounters are 20cm wide, that’s a considerable amount of shrinkage.
Read our KEF interview on the making of the LS60 Wireless
A slim cabinet calls for a slimmer-than-usual Uni-Q driver and KEF’s engineers have delivered a brand-new version (the 12th generation, would you believe?) of its trademark drive unit. It’s been designed specifically for the LS60 Wireless to cope with that change in width.
It is in fact the smallest Uni-Q driver the company has ever designed and combines a 10cm aluminium cone for the midrange with a 19mm vented aluminium dome tweeter. For this latest iteration of Uni-Q, KEF has added a tweeter gap damper and a new Z-Flex surround to aid dispersion and reduce distortion.
The tweeter also uses KEF’s Metamaterial Absorption Technology (MAT), which we saw debut on the KEF LS50 Meta passive speakers before it was introduced on the LS50 Wireless II. MAT helps to absorb soundwaves that radiate from the back of the tweeter dome so that they don’t interfere with the unit’s forward output. The application here takes the form of a round piece of plastic with a maze-like structure placed behind the tweeter. Each ‘path’ in the structure is a certain size and length and ‘tuned’ to absorb a specific range of frequencies. KEF claims that the paths help create an ‘acoustic black hole’, absorbing 99 per cent of the unwanted sound.
KEF LS60 Wireless tech specs
Active floorstanders: KEF LS60 Wireless
(Image credit: Future)
Uni-Q driver 19mm HF vented aluminium dome; 10cm MF aluminium cone
Uni–core driver 5.25in
Frequency range 26Hz – 36kHz
Streaming AirPlay 2, Google Chromecast, Roon Ready, UPnP, Bluetooth 4.2
Streaming services Spotify, Tidal, Amazon Music, Qobuz, Deezer, QQ Music
Formats MQA, DSD, FLAC, WAV, AIFF, ALAC, AAC, WMA, MP3, M4A, LPCM, Ogg Vorbis
Resolution support Up to 24-bit/384kHz
Inputs HDMI eARC, optical, coaxial, RCA, Ethernet
Subwoofer output x2
Dimensions (hwd) 109 x 21.2 x 39.4cm (with plinth)
Weight 62.4kg (total)
Finishes x3
That’s the mids and high frequencies taken care of in this three-way loudspeaker system, but how has KEF managed to ensure enough bass is created from such a slim cabinet?
The company has called on its clever Uni-Core driver arrays which made their debut on the company’s tiny KC62 subwoofer back in January 2021. They’re designed to deliver maximum bass from small enclosures, combining force cancellation (the drivers are mounted back to back), a shared motor and two completely different, concentrically arranged voice coils (one for each driver).
Each Uni-Core driver also uses KEF’s ‘P-Flex’ surround suspensions which helps resist pressure build-up inside the cabinet. Unlike their standmounter siblings, the LS60 Wireless are a sealed-box design.
Two pairs of 14cm Uni-Core drivers are used in each tower and positioned equidistantly around the Uni-Q driver array. KEF calls this its Single Apparent Source technology. The positioning of the drivers in this way means that lows, mids and highs all appear to radiate from a single point toward the listener. The benefit of this is you can deliver precise imaging and accurate sound over a wide listening area.
If you’re thinking the driver set-up looks a little familiar, it’s because KEF’s flagship Blade Meta loudspeakers use something very similar. Given those speakers cost a cool £30,000 ($35,000), it’s a signal of intent that KEF’s decided to trickle this technology down to the LS60 Wireless.
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Having so much weight positioned high up the speaker, KEF has had to ensure the floorstanders are as stable as possible with no threat of them tumbling over. To that end, each speaker is fitted with an extremely heavy base plate to keep it anchored to the floor. Thankfully they already come attached so the only decision you need to make is whether to attach the supplied spikes or stick with the rubber feet.
We experienced gains in clarity and bass precision when we switched to the spikes, although we also found the threads on our pair were slightly tight which meant it was a bit of a struggle getting them into place.
When it comes to finishes, the KEF LS60 Wireless comes in three different matte options: Titanium Grey, Mineral White and Royal Blue.
Features
Active floorstanders: KEF LS60 Wireless
(Image credit: Future)
The right speaker is the primary speaker and boasts the lion’s share of connections. On the rear you’ll find buttons for pairing left and right speakers together, connecting Bluetooth devices and resetting the entire system should you need to.
You’ve also got an array of digital audio inputs – HDMI eARC, optical and coaxial – plus a pair of analogue RCA inputs. KEF sees users not only feeding their speakers a diet of CD-quality and hi-res music streams but also as part of a modern, multi-functional AV system. During testing we connected an LG G2 OLED TV via HDMI and didn’t experience any latency problems, nor were there any issues with the robustness of the wireless connection between the two towers while they were handling the audio from the TV.
There’s an Ethernet port for connecting the speakers directly to your router or a switch and a second port which lets you run the supplied ethernet cable between both speakers. This allows you to up the native playback of the system to 24-bit/192kHz, though it’s worth remembering that the system is still capable of handling up to 24-bit/96-kHz natively through KEF’s own low-latency wireless connection (it will downsample anything above and up to 24-bit/384kHz).
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There’s also support for DSD256 and MQA decoding which will come in handy for anyone who happens to have a suitable collection of music files or who tends to listen to a lot of Tidal Masters.
Should you want to connect an external subwoofer or two, each speaker sports a subwoofer output.
The LS60 Wireless is driven by the same W2 wireless platform that was introduced with the LS50 Wireless II. This means you’ve got access to a plethora of connectivity options including wi-fi, Apple AirPlay 2, Google Chromecast and Bluetooth. You’ve also got Amazon Music, Deezer, Qobuz, Spotify and Tidal streaming services to choose from.
You get a small plastic remote control included in the box. It resembles something you’d get with a streaming stick and offers basic controls for playing, pausing, skipping tracks, switching inputs and altering volume. But you’re only really going to save this for emergencies; your day-to-day interactions will likely come through the KEF Connect app, which places all the playback controls, streaming services and internet radio at your fingertips.
It also gives owners the opportunity to set up the LS60 Wireless for their particular room layout. You can go into the app and choose to either configure a Normal or Expert EQ setting. The former offers basic adjustments that take into account factors such as the speakers’ distance from your wall, the size of your room and how well damped it is. The latter offers more extensive tweaking including treble trim, phase correction, and the ability to alter the amount of bass extension.
By default, the LS60 Wireless is set up for positioning in free space with bass extension set at medium, but the chances are this won’t suit everyone, so we’d make a beeline straight for those EQ settings mentioned above. KEF’s tried to make the whole process as simple or as involved as you want, and we feel it’s got the balance just right.
Besides all the streaming functionality, drive units and DSP, the LS60 Wireless also packs in all the amplification. Each speaker uses three separate amplifiers to drive low (LF), mid (MF) and high frequency (HF) sections independently. The LF section is powered by a 500W Class D amp, while the midrange uses a 100W amp of the same variety. The HF section, meanwhile, is driven by a 100W Class AB amp. They’re located in the lower section of the speaker which is sealed off from the top section to remove any potential interference with the drive units. The system is kept cool by the use of heat sinks and an opening between the base of the speaker and the plinth that allows air to travel up into the main electronics module and out of the speaker near a vent close to the back panel on each speaker.
