Skip Navigation

KEF LS50 Wireless

High-performance powered speakers with Wi-Fi® and Bluetooth® (Gloss Black/Blue)

32 Reviews | 9 questions - 23 answers

Item # 991LS50GBB

In Stock

 Ships FREE

Add to Cart

Ask an expert

Our VA-based experts can help.


Chat Email


Our take on the KEF LS50 Wireless

We see and hear dozens of new loudspeakers every year at Crutchfield, so it can be tough for one to stand out from the crowd. But these KEF LS50 Wireless powered speakers have a lot to offer, and they really grabbed our attention. They're beautiful, compact, easy to use, and versatile enough to form the core of your everyday sound system. And you won't believe the rich, detailed sound they produce.

A gorgeous, versatile high-end audio solution

We see and hear dozens of new loudspeakers every year at Crutchfield, so it can be tough for one to stand out from the crowd. But these KEF LS50 Wireless powered speakers have a lot to offer, and they really grabbed our attention. They're beautiful, compact, easy to use, and versatile enough to form the core of your everyday sound system. And you won't believe the rich, detailed sound they produce.

Audiophile sound quality

When you're going for that magical level of sonic realism that can raise goosebumps, one of the biggest challenges is matching the right amplifier to your speakers. So KEF has eliminated the guesswork: they put two custom-designed amplifiers in each speaker — 200 watts to each woofer, and 30 watts to each tweeter — so each driver gets perfect power. And the attention to detail doesn't stop there. Each driver has a high-end 192 kHz/24-bit DAC to make digital sound come alive.

Built-in digital signal processing (DSP) offers an easy Beginner mode, but you may prefer to take total control in Expert mode, and tweak the sound to perfectly suit your unique room. Whichever way you choose, you can make your changes via a free smartphone app, available for Apple® and Android™ devices.

Praise for KEF LS50 Wireless speakers from

"Something for audiophiles, something for mainstreamers – after all, it's in the LS50 Wireless' DNA. As a straddler of worlds, the KEFs walk away not only with a Knockout Award but also DAR's Product of the Year award for 2016. If this product doesn't convince audiophiles of the legitimacy of active loudspeakers, nothing will."

— From John H. Darko's review at, December 29, 2016
Read the full review

A room-filling "sweet spot," thanks to Uni-Q technology

KEF's patented Uni-Q technology places each speaker's tweeter in the acoustic center of the bass/midrange cone. That lets the LS50 Wireless create a detailed, accurate, three-dimensional sound image. In essence, it makes the "sweet spot" — the ideal listening position — much larger. Sit wherever you like! It'll sound fantastic.

My hands-on experience with the KEF LS50 Wireless

I originally heard these speakers in our spacious training room at Crutchfield HQ, then enjoyed them later in a smaller conference room. Nothing prepared me for what they'd sound like in my own home.

I fussed for a while, trying them on different stands before deciding to place them on either side of the TV, directly on the entertainment furniture. Easy-to-use Speaker EQ buttons on the back of the right-hand speaker let me quickly customize the speakers' sound to suit each location change. The free KEF LS50 Wireless app was there to help me further tweak the output so it sounded full and clear in my living room — an open-plan, more-or-less rectangular space with glass along one side.

Once I had the basics taken care of, I started to have fun. I elected to stream some dynamic, demanding tunes via the built-in Spotify Connect, and they sounded amazing. The bass is reasonably deep and accurate when using the speakers alone, but it's a good idea to plug a subwoofer into the provided outlet to get the full experience from music and movie soundtracks. Cellos and violins sound heavenly in string quartet selections. I've revisited every one of my favorite jazz singers, just to hear the vocal nuances the LS50s can uncover. They dramatically expand the soundstage and reveal detail in every track I play.

If you have limited space, but want to enjoy your music to the fullest, these speakers make a big, beautiful sound that belies their relatively small footprint.

Customizable room EQ with the free app

KEF knows your room is unique, so they've put the power of choice in your hands. Just download KEF's free app, and you'll be able to tune the speakers to suit your space. Once you've made all the big adjustments, you can revisit and make manual tweaks to your heart's content.

KEF LS50 Wireless powered speakers offer a variety of connection points, so you can choose how you want to use them.

KEF LS50 Wireless powered speakers offer a variety of connection points, so you can choose how you want to use them.

Convenient connections

Think of a way you want to use these LS50 Wireless speakers, and you'll likely find a connection to make it happen. Want to transform the sound from your TV? Run an optical digital cable to the back of the right-hand speaker. Enhance computer gaming by plugging your machine into the asynchronous USB port. You can even run the output of your phono preamp into the RCA inputs and enjoy your favorite records.

Or, you can skip the wires altogether and stream your favorite high-res tunes through the LS50 Wireless' Bluetooth® connection. Or use your home's Wi-Fi® network to play music files from a DLNA-compatible computer or music server. The left and right speakers share audio signals via an included Ethernet cable.

Did we mention that they're super-stylish?

LS50 Wireless speakers come in three attractive color combinations, so they'll delight your eyes as much as they do your ears. Each has a curved front baffle that adds a touch of elegance to your shelf or speaker stands. Even the most design-conscious homeowner can find a prominent place to display these beauties.

Product Highlights:

  • frequency response: 79-28,000 Hz (±3 dB)
  • bi-amped design with separate Class D woofer and tweeter amplifiers for greater headroom and lower distortion
    • woofer amplifier power: 200 watts
    • tweeter amplifier power: 30 watts
  • Uni-Q Driver Array technology makes your entire room sound like the "sweet spot"
  • individual 192kHz/24-bit DAC for each driver
  • 5-1/4" magnesium/aluminium alloy woofer
  • 1" vented aluminium dome tweeter
  • peak SPL: 106 dB
  • Bluetooth® 4.0 with aptX® for high-quality audio streaming performance
  • built-in dual-band Wi-Fi® for audio streaming from DLNA devices on your network
  • Spotify Connect lets you stream music wirelessly using the Spotify app on your smartphone or tablet (premium subscription required; requires firmware 1.62 or later)
  • precise digital signal processing controls allow optimal room integration
  • free downloadable app lets you make pinpoint EQ adjustments with your Apple® or Android™ device
  • bass-reflex cabinet with elliptical rear port for accurate, musical bass
  • MDF enclosure with elegant curved front baffle
Connections (located on back of right-hand speaker):
  • stereo line level RCA input
  • Toslink digital optical input (accepts signals up to 24-bit/96kHz)
  • asynchronous USB Type B input (accepts signals up to 24-bit/192kHz)
  • 10/100 Mbps RJ45 Ethernet input
  • mono RCA subwoofer output
  • detachable power cord
Dimensions and Warranty:

What's in the Box:

  • Bluetooth powered speaker (Right)
  • Bluetooth powered speaker (Left)
  • Two 6.5' AC power cords
  • 10' Cat-6 interconnect speaker cable
  • 6.5' USB-B to USB-A cable
  • 42" Ethernet cable
  • Remote control (CR2032 battery installed)
  • Quick Start Guide
  • Important Safety Information
  • Warranty Information
  • "Caution/Warning" sheet

I have always been an audiophile, and cannot stand deficient speakers. I have to say that these relatively small speakers put out exceptional sound and can fill large rooms with ease. A great set of speakers! The wifi app by KEF is the only drawback. But not negative enough to reduce from 5 stars!

Joe, Cincinnati, OH


KEF LS50 Wireless Reviews

Average Customer Review(s):

(32 Reviews)

Audiophile approved

Joe from Cincinnati, OH on 6/11/2018

Crutchfield Customer Review (What's this?)

I have always been an audiophile, and cannot stand deficient speakers. I have to say that these relatively small speakers put out exceptional sound and can fill large rooms with ease. A great set of speakers! The wifi app by KEF is the only drawback. But not negative enough to reduce from 5 stars!

Pros: Excellent sound from relatively small speakers

Cons: KEF wifi ap

KEF LS50 Wireless

Ed from Burtonsville, MD on 6/11/2018

Crutchfield Customer Review (What's this?)

I'm an old silverback gorilla recording engineer specializing in classical music. I got my start in the early 1970's and my loudspeaker for monitoring was the Rodgers LS3/5A powered by a Crown D75. Funny I switched amplifiers (Quad and Sony 3120) but I stayed loyal to the speakers. Setting up the amp and speakers time consuming. Powered monitors were a radical idea in the early 1980's, but I switched to the Klein and Hummel OY and then the 096. These were larger and could be used at a greater distance. They also offered enviromental adjustments. Overtime the circuitry failed from stresses of speaker cabinet vibrations. I replaced the K&H with another amplified self calibrating system by Genelec. Funny, set up was once again time consuming, and to be honest, a large portion of my best work was creates using the LS3/5A. Recently, KEF developed an advance coaxial desgned driver with extraordinary capability, complimented by serious cabinet, crossover and port design. Very tempting I thought. It took a long time to sell the focal monitors, which was fortunate because KEF developed their wireless LS50. Such an absolutely complete and totally excellent system. I actually prefer them to my large studio monitoring system. The KEF stands allow me to to do mid and nearfield monitoring both on location, and in my production studio. Just faboulous! I'm looking forward to wonderful creating and joyful listen.

Pros: excellent complete monitor system. Usually speaker designers aren't great amplifier designers, and vice versa. Not true with the LS50Wireless. Excellent crossover and power design.

Cons: I have a lot of alternative equipment that will go unused.

KEF LS50 Wireless

Anonymous from Pls Vrds Pnsl, CA on 4/15/2018

Crutchfield Customer Review (What's this?)

Great speakers! Came with the ls50w stands as well. Looks great and sounds amazing.



Excellent but finicky

Srinivas from Tampa, FL on 4/6/2018

Crutchfield Customer Review (What's this?)

Holographic sound with a very wide sound stage. However, all of this disappears once you swap right speaker to left (re-programming) to connect to my sub-woofer. Also, these speakers are unforgiving if the source is not correct.

Pros: Huge soundstage with good tonal balance.

Cons: Sound quality is very sensitive to the speaker position and the app/wireless is terrible. It is a nightmare to integrate the subwoofer.

KEF LS50 Wireless

Paul from North Port, FL on 3/21/2018

Crutchfield Customer Review (What's this?)

Excellent audio, crisp, tight, quick, and balanced across the tonal range. Highs that sparkle and more base Then I expected from a speaker of this size, and they're easy on the eyes. The app needs a lot of work, the remote is not illuminated and not easy to use without any indexing to help identify the keys. There are no indicators on the front on the speaker to show status(on/off, mode), you can only see them from directly above the speaker. I bought the wireless version for the simplicity and convenience, KEF's got a ways to go to meet my requirement for convenience. As a speaker they are a 5+ for user convenience they're low, very low.

Pros: Great sound and tonal quality, easy on the eyes.

Cons: Not as convenient to use as I had hoped.

Highly Recommend!

Luke from Maggie Valley, NC on 2/25/2018

Crutchfield Customer Review (What's this?)

Good Speakers! Worth the price! Sound great! Look Great! Simple... all-in-one... did it all... no fuss! Highly Recommend!

Pros: Build Quality, Cosmetics, Sound Quality, Compact, Value

Cons: None

Best speakers for the money

Andy from Columbus, IN on 2/23/2018

Crutchfield Customer Review (What's this?)

Amazing clarity, detail and soundstage. They live up to the hype. Almost no need for a subwoofer.

Pros: Small, beautiful, powerful and clear.

Cons: Remote and app are junk. Luckily I'm not using either one after initial setup.

Fantastic Sound... truly unbelievable

Adam from Grantsville, MD on 2/19/2018

Crutchfield Customer Review (What's this?)

Whether you need a compact system or not, these speakers deserve a look. I was skeptical that they could deliver on the hype and thought it may be a case of "for the size" or "for the money." I am happy to report that they deliver in spades. I have several other references including high end JBL studio monitors and B&W floor standers. The beauty of these speakers is that the amplification is perfectly matched to the speaker. Other systems are capable of this sound quality but you'll need to spend a lot more and do a lot more experimenting with preamps, amps, etc.. I can't recommend them highly enough.

Pros: Out of the box brilliance

Cons: would like grille covers for when kids are around.

Unbeatable for Price and Form Factor

Tim from Ponte Vedra Beach, FL on 2/6/2018

Crutchfield Customer Review (What's this?)

For the price, these are no-question a 5-star product. I may still find myself wanting "more" in my biggest listening room, but that "more" will likely carry a price tag of 5-7 times my all-in cost on the LS50Ws. A couple weeks into my testing, I did purchase upgraded power cables. Prior to this upgrade, the KEFs were punchy, vibrant, and detailed, but perhaps at times too much so for my tastes. Post upgrade, I feel like nothing has been lost but a great deal of relaxed vibe has been gained. Everything seems more effortless now, mellower, less brash. The KEFs do indeed respond to their own DSP settings (stand/desk, wall/freespace), and I have also made additional tweaks in Roon. The KEFs are fed by a Roon core laptop, using AudioQuest Cinnamon USB cable and a couple AudioQuest JitterBugs. KEFs are sitting on matching KEF stands.

Pros: Full, energetic, balanced, detailed sound. No fiddling required. Better bass than you'd expect. Probably the perfect smaller room solution, but does a great job in my "larger" 18'x15'x10'(ceilings) den.

Cons: Just for funsies, wish I could bypass amps and DACs and use passive. Would "future-proof" them.

KEF LS50 Wireless

Greg from Boulder, CO on 2/4/2018

Crutchfield Customer Review (What's this?)

Super easy Bluetooth setup, very nice sound quality. Very happy with the purchase. Easily recommend the speakers.

Pros: Easy Bluetooth setup, easy iPhone use NIce sound quality

Cons: The App is worthless and seemed to add no value. Deleted it off my phone first day.

A little effort, but jaw dropping detail.

Donald from Buford, GA on 1/18/2018

Crutchfield Customer Review (What's this?)

Okay to start off I was frustrated for the first couple of days. It takes a little bit of effort to get these things up and running correctly. On day 4 I have the ls50 w attached to my media server. I performed the firmware update with very little issue. I now have Spotify and Tidal. The app from my Android phone is functioning well. After being a mid-grade audiophile for 42 years, I can say I got chills once the ls50 ws we're up and running. The detail you get from these little things is incredible. Highly recommended

Pros: Some of the best sounding speakers you will ever hear. No need for a sub. Just listen to the detail and the tight bass.

Cons: Setup is a bit difficult. Nothing major, but you must download the new firmware to the speakers to get the maximum benefit. The old firmware does not cut it

Good but pricey compact system

Anonymous from Antioch, CA on 12/3/2017

Crutchfield Customer Review (What's this?)

Good as compact system but poor firmware / app (e.g bad volume control in app and slow volume response , unable to connect to 5Ghz channel on dual band router when the wireless router set to "auto" in 5Ghz radio channel ). Remote control works about 15 feet away from front of main speaker. Overrated sound quality for this price. My old Infinity Beta40 , Onkyo TX-NR709 and Oppo 205 sound better in bass .



Outstanding active speakers!

Peter from Gleneden Beach, OR on 12/3/2017

Crutchfield Customer Review (What's this?)

The five stars are purely for the outstanding sound and design of these amazing active speakers. I never thought it would be possible to acquire a system with this level of sonic quality for this price point much less half of that! My set is fully broken in and I am constantly blown away at the performance and nuances I was missing from completely familiar music with previous set ups. If you are even remotely considering getting these gems do not hesitate: You will be thrilled in the amazing, detailed, spacious traits of these outstandingly well engineered pieces of art! If you are looking to purchase these based on the wireless capabilities, specifically using the LS50 wireless app beware! The app is incredibly horrible. It is by far the worst performing app I have ever used. I am actually amazed that KEF would even consider releasing this app.

Pros: Accurate, detailed and incredibly musical with unbelievable lower end extension given the form factor and driver size: pure wizzardry! Unparalleled soundstage presentation. Exceptional value! You would be hard pressed to put together a system that comes remotely close to this set for this price point

Cons: App is horrible: Less than 1 star for app.

Amazing speakers

Jason from Cypress, CA on 11/14/2017

Crutchfield Customer Review (What's this?)

Awesome speakers. Love the convenience of dsp and dedicated amps integrated inside. Sound is holographic with a wide sound stage.

Pros: Clear, holographic, and stunning sound from an award winning speakers

Cons: The app is a bit laggy and can use a bit more refinement.

KEF LS50 Wireless

Anonymous from Corona Del Mar, CA on 11/9/2017

Crutchfield Customer Review (What's this?)

awesome speaker convenience of multiple input sources some complexity in fine tuning but worth the effort app needs work 3 stars for that but the music is heavenly



KEF LS50 Wireless

James from Cumming, GA on 11/7/2017

Crutchfield Customer Review (What's this?)

No doubt about it, as all the other reviews state the app control is terrible. After a few days with it crashing, losing connection, etc I noticed that when I first turned on the speakers ( I have a sub attached) everything was fine but as soon as I would adjust the volume control (up OR down) the sub output would decrease about 50%. If I power cycled the speakers, they would come on and work fine but the second I touched the volume control the sub level would drop dramatically. I was about to call to arrange a return when I decided to simply delete the app from my phone and just use the speakers without it. After that they perform flawlessly and have ever since. The app is simply terrible. Note- I use the USB input and have a Mac mini connected running Tidal, JRiver, etc. Also have a turntable, CD player etc, so I do not use any of the wireless or blue tooth functions. Just based on the sound alone I could give these a 5 start rating. But the ridiculously bad app prevents that. These sound better than any speakers I have even owned. My humble system before the LS50W addition consists of about $12,000 in speakers, amp etc. The LS50 W simply blow all that stuff away. I am seriously thinking about just making these the heart of my system and retiring the rest. If someone asks me what's a good introduction to audiophile world I would recommend these as long as the wireless/app portion is not important to you.

Pros: Sounds amazing.

Cons: Bad app!

Future Fi NOW

Robert from Mcmurray, PA on 11/5/2017

Crutchfield Customer Review (What's this?)

Currently auditioning both the older passive model LS50 and this newer powered model LS50 Wireless. Both speakers are really quite excellent especially for a desktop system. However, there are many great benefits to this new wireless model over its predecessor in that it has four perfectly matched amplifiers and DACs, one for each of its drivers. In addition, it also has several built-in DSP type controls that allows it to be customized specifically to one's needs and taste whether that be on a desktop or in a conventional two-channel stereo setup. To assemble this same level of power (230 watts per speaker!), goodness and adaptability would be crazy expensive. You can also forget the need and expense of buying interconnects and speaker cables. Just plug and play with minimal fuss. In addition, this model also now has the music streaming services of Spotify, Tidal and Roon onboard and can be controlled by app on your tablet or phone. So, how does it sound? Absolutely phenomenal! In fact, it sounds way better than the passive model LS50 driven by a Marantz amp. Whether this would be the case with a more expensive amp I can't be sure. But then we are talking about significantly more money with no guarantee of better results. Such is the agony of amp to speaker matching, a crazy game played by audiophiles with way deeper pockets than mine! Save the drama and give these a listen.

Pros: All-in-one simplicity with incredible sound. No need to match amp and speakers. No speaker or interconnects to worry about.

Cons: Daily prayers for the very best in electronic reliability otherwise you'll end up with some mighty fine paperweights!


Anonymous from Brooklyn, NY on 11/4/2017

Crutchfield Customer Review (What's this?)

I've had a few sub $4k hifi configurations over the last 15+ years and these KEFs sound better than all of them. If you're shopping for excellent sound, lossless streaming and want to avoid the price and aesthetic of a multi-component system, this is, to my mind, the way forward. Note: The five star rating does not really take into account KEF's app, which sucks (as noted many times around the web) and is arguably worth docking a star. I've found the app just functional enough but will likely invest in Roon soon.

Pros: Sound, value, ease and look.

Cons: That app...

KEF LS50 Wireless

Anonymous from Miami Beach, FL on 10/27/2017

Crutchfield Customer Review (What's this?)

Great product. Comprehensive functionality in a beautiful, elegant, simple design. And most important, very good sound. Clear, accurate, but not harsh, and truly surprising bass. I've heard the DSP increases the bass response over the passive version. I haven't heard the passives, so I can't verify that, but I was impressed by the quality of the bass from such a small cabinet. For me, though, there still wasn't quite enough bass. I compared them to the ELAC FS U5 floorstanders powered by the Peachtree nova150 (a more expensive combination, even considering the cost of stands for the LS50W), and chose the ELAC/Peachtree pair instead. Crutchfield service was excellent throughout, from recommendations before to arranging the return.



Couldn't be much more different from base ls50

Roger from Verona, WI on 8/2/2017

Crutchfield Customer Review (What's this?)

Bought these on open box after selling my "wired" ls50s and they were in like new condition. I gave up and on the base model because they were forward and bright and a little fatiguing to listen to....even though I loved the detail and space and ability to hear deep into the music. This was with a smooth musical fidelity integrated and multiple sources. Because I liked the positive qualities and the reviews describing the differences I decided to give the "wireless" version a try. Figured the freq EQ DSP and use of digital crossover could address the issues I had with the original. Wow...what a difference. These are strong, punchy, much warmer while retaining at least as much detail. They just sound like music... smooth, detailed and no listening fatigue. Probably not even broken in yet either. I'm currently feeding them from my Sonos connect digital out through toslink glass cable and want to listen for hours... to all types of music... jazz, classical, rock... After selling off my amp, DAC, and speaker cables I'll probably come out ahead.... these are the best of many stereo rigs I've owned and a great bargain... I have the gray and deep red and they look and sound stunning.... Get em.

Pros: Smoother than ls50 At least as detailed Way better quality bass No listening fatigue No amp or DAC expense

Cons: If u wanna change you'll need to rebuy all your components.

Awesome speakers, Crappy app

Vikram from New York, NY on 7/14/2017

Crutchfield Customer Review (What's this?)

My first real piece of audiophile grade equipment after doing tons of research. I loved the fact that I didn't have to actually buy separate DAC, pre-amp etc, and think about how each may be compatible or how the sound quality might vary depending on what you pair with. This was something I really didn't have to think about with this system and the best part is that it fits great even on my computer table. May not be the best place to put this speakers but I will be slowly adding stands and acoustic panels to get better sound. The speakers sound great to my ears. The sound stage and accuracy are excellent, but definitely needs a sub woofer if you are listening to EDM, deep house or rock, none the less even these genres these speakers sound wonderful. Can hear a lot more details now, that brings new life to every song. One thing I found is that these speakers sound better at higher volumes and if you have a small room I would think about that because they can easily fill a room. The only reason I gave this a 4 stars rating is because of the crappy app that is needed to control all the equalizer settings. Its TERRIBLE and I hardly use it. It only runs using wifi which makes no sense. I can't change any settings when I am streaming on bluetooth or have it connected to my computer ( my primary ways to listen) I really hope KEF addresses these issues. Still no support for listening to spotify or pandora or anything except for Tidal on WIFI. I would recommend.

Pros: * Sound quality * Portability

Cons: * App lacking features

Simple set-up, Great Sound

Joe from Jersey City, NJ on 6/24/2017

I bought these for my living room. I wanted something simple so everyone in the house could listen. I've got them on the KEF stands with a JL E112 sub which sits on a custom Isoacoustics sub stand (Highly Recommended!). So, I use these for both TV and music. With movies, this 2-channel rig completely dominates a $25K+ HT rig in my other house. These speakers absolutely scale up. For TV/movies, I go toslink out of the TV to a W4S Remedy and then toslink to the speaker. For music, the chain is as follows: sonicTransporter i5 (powered by Uptone Audio JS-2 psu) with external 1TB Samsung ssd to Fios Router via Audioquest Cinnamon Ethernet and then the signal goes to a MicroRendo (powered by Uptone Audio LPS-1) via Audioquest Cinnamon Ethernet. I've got as much money into the digital feed as the speakers plus stands, but IMHO it's totally justified. The stands are aesthetically pleasing but are certainly the weak link in this picture. As you can tell from the rig, I'm an unrepentant audiophile and tweaker. I think I've got about $7,500 tied up in this system. In the right room, you'll be hard-pressed to beat the sound at any price. And the convenience is off the charts. I'm a former horn/SET guy and value a meaty, energized sound. This has it in spades! I'm listening to more more music than ever now. That's the whole point!



Practical High End Computer Speaker Choice!

Aaron from Boca Raton, FL on 5/20/2017

Crutchfield Customer Review (What's this?)

I replaced a pair of Focal CMS 50 fed by Auralic Vega DAC with this Kef LS50 Wireless. They are without a doubt a practical choice for those who want among the very best in Computer Audio. They would also be a great choice for those who wish to upgrade their TV sound with stereo speakers of much higher quality. To make use of these speaker capabilities you would need ISOACOUSTICS stands. I have used both the 155 and 200 on these. The manufacturer recommends the 155. I have also had the older version and the new APERTA series. The APERTA series are well worth the extra moeny as they sound better reducing resonances beyond the original. They also look much better. I have also tried different USB cables from the Audioquest Pearl to their Carbon. In the Audioquest line I found the FOREST to sound and overall perform best. It sounds significantly better and cleaner than the Belkin Gold and more musical than the more expensive Audioquest CARBON. I have also tried more exotic designs where they separate power and the signal line. I also calibrate the computer set up using DIRAC LIVE calibration software.

Pros: Great sound potential at relatively low cost Easier than usual set up.

Cons: Software quirks and remote with no sense of volume level. 30 min auto turn off

Unbelievable - I am so happy

Misha from San Diego, CA on 5/8/2017

Crutchfield Customer Review (What's this?)

These speakers are amazing. KEF has matched the awesome LS50 speakers with built-in amplifiers, DSP, and DAC that are perfectly suited for the driver. The result is a heavenly sound. With the built-in components, KEF engineers have taken the LS50's and made them sound as good as freaking possible. I wanted to treat myself to a sweet stereo system, and I spent a long time looking for speakers that I loved. This was the 6th pair of speakers that I tried. I am glad I waited. Every time I listen to these, they make me smile. My friends are super impressed, and look forward coming to my place to pump some music. I have somewhat sensitive ears, and I get listener's fatigue pretty easily. That doesn't happen with these. I paired these with a Paradigm subwoofer, but it's not strictly necessary as these have pretty great bass extension by themselves (for bookshelf speakers). Crutchfield is a great company btw - I've really enjoyed their customer service and I'll be buying from them again.

Pros: Amazing sweet sweet sound. If you're looking for a set of bookshelf speakers for music, these are an excellent choice.

Cons: Expensive, but for me it was worth it

Amazing Sound for the Price

BigBeard from Yonkers, NY on 4/25/2017

Crutchfield Customer Review (What's this?)

I am very impressed by these speakers...I was worried I would be let down, considering the rave reviews found everywhere - I believed, at that time, the speakers were going to be overhyped. The precision and soundstage is amazing - its as if I am listening from multiple speakers. In certain songs, you can hear the singer's lips part. Highly, highly, detailed sound. On their own, the bass is the best you can get from anything this size...but I am a bass head. If you don't listen to any music with very low bass notes, you will be absolutely fine. Unless you have a nice set of floor standers, you will always need a subwoofer if you really want those low frequencies. I am a basshead, so I paired these speakers with a PSA 3000i sealed sub - the pairing is magical. I think I would have to spend 10 grand more to get better sound than this. The app is really not an app - just a way to manage DSP settings. I really do hope they can improve the app. DSP settings are very nice, and correct issues of placement. Don't expect to stream music...the only way you can is if you can songs downloaded onto your phone/tablet. The speakers must also be in wifi mod to make any DSP changes. These thing must be fixed. A desktop app would be great too. I do not want to take stars off for the app - The speakers deserve 5 stars. For the days before the speakers arrived, I had some remorse because I thought I might regret it. Now, I cannot find enough time to keep.



KEF LS50 Wireless

Anonymous from Las Vegas ,NV on 3/27/2017

Crutchfield Customer Review (What's this?)

More than happy !! Amazing



Regular LS50 owner. Great package in a very reasonable size.

David from Manassas, VA on 3/24/2017

Crutchfield Customer Review (What's this?)

I own the original LS50s and still have them set up in my living room. Just to compare: No Comparison! Reason? Just my opinion: all the guess work for the upstream is taken out of the equation. I can tell you right now the wireless units sound so much better right out of the box compare to my old LS50s driven by a Benchmark DAC USB and the Yamaha AS2000. The Yamaha + the DAC + the LS50 were pretty expensive new. These wireless ones beat that set up hands down with minimum fuzz in setting up and component picking at 50% of the cost of my existing system and sound better! I'm not saying my existing LS50 sounded bad, it's just that these wireless units sounded that much better. Totally beat my expectations! Now I'm thinking about selling the regular LS50s and getting another pair of these haha. It doesn't get much better than these, regardless how much you would spend! Also another big thumbs up to Crutchfield. Great shopping experience: placed the order on Wed and got it on Fri!

Pros: No fuzz set up, no need to shop for component synergy. All internals are matched and engineered for the speakers, making this relatively small system really hard to beat for the price!

Cons: I wish the iOS app can change the source and volume of the speakers as well. Right now it is kinda clunky to use. Hope future firmware/app update will address these issues. Supplied power cables should be longer to aid easier wire hiding.

Great sounding, versatile speakers.

Ryan from Chicago on 3/20/2017

Crutchfield Customer Review (What's this?)

Awesome speakers that ended a long search. The fact that you can adjust the sound of these speakers to fit your environment is huge! The speakers are not on stands but on media console and they still sound great. Excellent bass - I could easily go without a subwoofer. Something these speakers can do that in my experience is very rare with more expensive gear, is make even not so good recordings, sound pretty good. The app, however, is pretty much terrible. I am used to using an app with my denon receiver which is always connected and pretty much controls all the features the receiver has. This app is only connected when the wireless source is selected. If you want to adjust settings while listening to another source, you need to first connect in wireless mode, then switch to the other source. If the app times out for any reason, you will have to, along with killing and re-starting the app, repeat the procedure. You cannot control volume or switch sources with the app, nor can you wake the speakers. You have to use the included remote. I don't use the app to stream music because I use Sonos, so I can't comment on that.

Pros: They sound great anywhere you put them. They sound great will all music.

Cons: The App/network features

amazing sound and versatility

Craig from Mount Kisco, NY on 3/17/2017

Crutchfield Customer Review (What's this?)

Powerful smallish powered speakers that produce incredibly detailed sound. Great recordings sound incredible and less good ones sound less good -- what I mean is they are "transparent." Love the frequency response -- the bass, though not overwhelming, is quite decent. Bass lovers might want to add a powered sub-woofer. I also love their versatility with wifi (app is available), bluetooth, analog, toslink/optical, and pc connectivity. Amazing speakers.

Pros: incredible sounding speakers in a small package able to take wired or wireless signals. Just plug or wirelessly connect your music source and you're there.

Cons: none that I can think of.

Not Wireless but Still Exceptional

douglas from Los Angeles, CA on 3/1/2017

Crutchfield Customer Review (What's this?)

Remove the word Wireless from the product name and it would've been 5stars. You'll read this in every review, so I'll make it brief. The streaming functionality via WiFi is horrible. In a world where software products and firmware can be updated daily, there is promise that this functionality will get better. For me, my LS50w's are situated right in between my computer desk and are directly wired into my laptop via USB. I am running Roon playing local flac's and other high res files, as well as Tidal streaming material. So far its working perfectly. I can control my Roon via my phone most of the time, although it can even be a bit touchy. I also have a Rega P2 running through a Bellari Preamp into the LS50's. Regardless, the sound is amazing. I'm stepping up from a pair of KEF Q100's hooked up to an HK stereo integrated with a subwoofer. The LS50's have taken me to that next point in listening that I've been waiting for. Not only do i get imaging and staging several times over my previous setup, but i am also able to ditch the amp and subwoofer! The bass this thing is capable of is tremendous. No need for an additional sub unless you want to shake your fillings loose. I'm not a terribly well experienced audiofile. This is my first step into any product breaking the $600 mark. I think the combo of being able to reduce my clutter of equipment while taking a substantial step up in sound quality makes this product a winner.

Pros: Sound quality, convenience, all in one

Cons: Poor app and streaming experience (for now)

The Furure Is Now

Daniel from Philadelphia, PA on 2/12/2017

If you're looking for the best sound per dollar you can abhieve for a budget of approximately $2500.00 then look no further. This is it. You'll need to use a wired source to achieve the best sound since as most people know, Bluetooth is lossy. I wasn't sure at the time I bought these that I would keep them, but I quickly decided to sell my old setup. I literally pocketed $10,000 when I sold off the old gear, so after deducting the the money for this, I was left with a whole bunch of money to buy music! Haha Buy a pair!

Pros: Perfect synergy- custom matched amplifiers, DACs and speakers. Looks. Reference sound for the money

Cons: If there is one I haven't found it.

Pure joy!

Bob from Westfield, MA on 1/27/2017

Pre-ordered these last October and just set them up a few days ago. Out of the box, I wasn't impressed with the sound quality. The unit is shipped in a flat configuration sound-wise which makes sense. Once I downloaded the app and played with the room settings, the speakers eventually came to life - in a big way. Deep, tight bass, clear mids and accurate, but not harsh highs. I am able to hear instruments on my favorite tracks that I hadn't heard before! The soundstage is breathtaking. The build quality is superb. I can see attention to detail throughout. I have the gloss black/blue combo and I love it. KEF hit it out of the park with this product. These speakers will only get better as they break in. Just be aware that you'll need to fiddle with the app to get the right sonic performance out of these gems. Be patient, it's worth the effort.

Pros: Superb build quality Produces a very accurate and breathtaking sound stage USB mode produces the best results Hardware setup is very straightforward

Cons: Takes time to dial these into the listening area Wrestling with configuring wifi to work with devices (using USB for the moment) Expensive, but worth it


Hands-on research

Product Research

Audio Section
Variety Of Sources
Convenience Features

Audio Section

Uni-Q Driver Array: The LS50 powered speakers feature KEF's patented Uni-Q driver configuration, in which the tweeter is mounted at the acoustic center of the midrange cone. With both acting as a single point source, the sound is dispersed widely and evenly throughout the listening area allowing you to experience superbly defined and perfectly balanced stereo imagery with a wide "sweet spot". The Uni-Q driver array is made up of a 1" aluminum vented-dome tweeter and a 5.25" magnesium/aluminum alloy cone woofer.

  • 1" Aluminum Vented-Dome Tweeter: The geometry of the tweeter dome matches that of the midrange cone to avoid disrupting the waveform. By smoothening high frequency response, this helps to account for the detailed and strikingly natural-sounding treble. The 1" aluminum vented-dome tweeter utilizes a Tangerine Waveguide to encourage the sound to radiate spherically for wider, more even dispersion so that everyone in the room enjoys the same superb sound quality. A large internal vent prevents potentially distorting high pressures from building up behind the dome in the critical vocal region, preserving all the nuance and fine detail of the original performance.
  • 5.25" Magnesium/Aluminum Alloy Woofer: The 5.25" woofer uses a magnesium/aluminum alloy cone that is light, stiff, and smooth for natural midrange and midbass sound. A well as allowing the midrange cone its full extension, KEF's ingenious Z-flex surround guides the sound from the tweeter across the surround without any disturbance or secondary radiation. Treble response is clearer and sweeter.
Note: The LS50 powered speaker system does not include grilles.

Bi-Amplifier Configuration: The 1" aluminum vented-dome tweeter and 5.25" magnesium/aluminum alloy woofer are powered by an incredible clean and fast 230 watt amplifier in a bi-amp dual mono configuration (200 watts to the woofer and 30 watts to the tweeter) that produces high-fidelity sound.

Note: Because the LS50 Wireless speaker system is self-powered, each speaker will need to be plugged into an AC wall outlet.

Advanced Time Correcting DSP: The LS50 Wireless employs an advanced time correcting DSP crossover that corrects for inherent time delays introduced in the crossover stage.

FEA-Designed Cabinet: The FEA-designed cabinet with its constrained layer damping bracing and precision engineered curved baffle, along with the elliptical flexible port all work in concert to prevent cabinet vibration and resonances that produce unwanted sound coloration for clear, spacious, distortion-free sound.

  • Curved Baffle: The curved baffle is shaped so that the sound waves spread from the drivers with minimum reflection from the edges which gives a very nice spacious sound. The curvature also improves the rigidity of the baffle which reduces vibration and sound coloration.
  • Constrained Layer Damping: The constrained layer damping which is between the brace and the enclosure walls and also the front baffle, prevents the cabinet from vibrating and radiating sound. This helps to prevent coloration in the midrange.
  • Flexible Port Tube: The rear-firing port tube has a flexible wall which allows midrange sound that is travelling down the port tube to escape back into the cabinet and prevents longitudinal resonances; which can otherwise radiate and cause midrange coloration. The port tube also has very carefully flared walls to avoid the chuffing noises that you can hear when you get air turbulence inside the port.

24-Bit/192kHz DACs: The LS50 Wireless features an end-to-end 192kHz/24-bit high-resolution digital signal path with two separate DACs for each speaker, for a total of four for the pair.

Speaker EQ: The LS50 Wireless speaker system provides a built-in Speaker EQ to tailor the sound of the system to the placement of the speaker. Select from "Desk", "Stand", "Wall", or "Free Space".

Advanced Audio Settings: Through the KEF LS50 Wireless app for Apple iOS 8.0+ and Android OS 4.1+ you get access to advanced  audio settings to expertly tailor the system's sound to your room environment and preference.

  • Room Acoustics: You can select the size of your room (Small, Medium, or Large), as well as indicate the room setting (Damped, Moderate, or Lively). In addition, you can indicate how far the speakers are from the back wall.
  • Bass & Treble: You adjust the treble trim from -2dB to +2dB. The bass extension can be set to Less, Standard, or Extra. There is also phase correction between the two speakers.
  • Sub Controls: If you connect a powered subwoofer you can activate a variable high pass (50-120Hz) & low pass (40-250Hz) crossover. You can also adjust sub polarity and sub gain (-10 to +10dB), as well as the balance between subwoofer and speaker.

Tethered Cable: The speakers are labeled "RIGHT" & "LEFT". The included 10' Cat-6 cable plugs into the back of each speaker to connect them together as a stereo pair. You can set the balance between the Right & Left speaker.

Subwoofer Output: The KEF LS50 Wireless speaker system is equipped with a mono-RCA subwoofer output to connect a powered sub (sold separately).

Variety Of Sources

Wired or Wireless Network Connectivity: The KEF LS50 speaker system can be connected to your home network via a wired (Ethernet) or wireless (WiFi) connection. There is a RJ-45 Ethernet port (10/100Mbps) on the back of the speaker which allows for a hardwired connection. Built-in 2.4/5GHz dual-band WiFi (802.11 a/b/g/n) allows the LS50 speaker system to connect wirelessly to your home network.

Note: KEF recommends streaming Hi-Res music files over a 5GHz WiFi network with a router transmission speed of at least 1300Mbps

DLNA Compliant: The  LS50 Wireless is a DLNA Digital Media Renderer and can play Hi-Res music files (up to 24-bit/192kHz) from other DLNA servers and NAS (Network Attached Storage) devices. The following music files can be streamed wireless via DLNA.

File Format Sampling Frequency Bit Rate or Bit Depth
MP3 8-48 kHz 16 bit
WMA 8-48 kHz 16 bit
AAC 32-96 kHz 16 bit
AIFF 32-192 kHz 16 / 24 bit
FLAC 8-192 kHz 16 / 24 bit
WAV 8-48 kHz 16 / 20 / 24 bits
PCM 8-192 kHz 16 / 20 / 24 bits
Note: The LS50 Wireless does not support gapless playback.

Asynchronous USB-B Port: The LS50 Wireless speaker system is outfitted with an Asynchronous USB-B port for playback of 2ch PCM music files (up to 24-bit/192kHz) from your Windows PC (7-up) or Mac computer (OSX 10.6-up). If you are using a Windows PC, you will need to download a dedicated USB audio driver from the KEF website.

Note: There is also a USB-A port, but this is for service and software/firmware updates only. It cannot be used for music streaming.

Optical Digital Input: The LS50 Wireless speaker features an optical (toslink) digital input with support for 2ch PCM audio (up to 24-bit/96kHz). The Optical digital input does not support Dolby Digital, DTS, or other multi-channel formats.

Stereo RCA Input: The LS50 Wireless powered speaker offers an analog stereo RCA output for connection of an analog audio source device. If you want to connect a turntable, you will need a turntable with a built-in phono preamp or an external phono preamp (sold separately).

Bluetooth 4.0: With its built-in Bluetooth (version 4.0), you are able to wirelessly stream stored music and music apps from your Bluetooth-enabled Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows Phone/PC, Mac computer/laptop and other Bluetooth source devices to the KEF LS50 speaker. You'll still need to control music playback and view song/artist info from your Bluetooth source device.

  • aptX: In addition to support the standard Bluetooth SBC codec, the KEF LS50 offers support for aptX. With aptX, you can stream CD-quality sound from aptX compatible devices (like Android OS 4.0+). Now your wireless music sounds rich, full, and natural with less compression.
  • SSP: With SSP (Simple Secure Pairing), Bluetooth source devices can be paired with a single press of a button and without entering PIN code. Up to 8 devices can be paired with the LS50 speakers and two devices can remain connected, but only one device can be playing at a time.
Note: Due to the differences in Bluetooth technology, some Bluetooth enabled devices may be incompatible, function improperly, or may not support all features when used with the KEF LS50.

Convenience Features

Top-Panel & Remote Control: The KEF LS50 Wireless features top-panel touch-sensitive controls for Power, Source Selection, Bluetooth Pairing, and Volume. The included IR remote provides wireless operation of the same functions, plus Play/Pause, Previous/Next Track and Mute.

Remote App for iOS &  Android: The KEF LS50 Wireless app for Apple iOS 8.0+ and Android OS 4.1+ provides comprehensive and intuitive controls for the LS50 Wireless speaker system through your compatible smartphone or tablet device. The KEF LS50 Wireless app offers simple setup, flexible sound adjustment, and music streaming from your compatible mobile device and/or DLNA music server with complete playback control, song/artist info and album art.

Detachable AC Power Cords: Each speaker is powered by standard household current using the internal power supply and a detachable AC power cord.

Note: The KEF LS50 Wireless speaker system is not battery powered.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Great reviews on this speaker. Wireless option makes it very compelling. [ edgar  Apr 09, 2018 ]
Good quality sound combined with simple set up [ TERRI  Mar 13, 2018 ]
Good ratings. Best of color choices offered (would have preferred black cabinet & black speaker cone). [ Kelly  Feb 09, 2018 ]
Excellent reviews. [ P  Dec 04, 2017 ]
Good reviews and simple plug and play options [ Ronnie  Aug 12, 2017 ]
I have old ears. I need good treble and have to sit in the sweet spot. TV sound is a particular problem for me. Most sound bars have a very narrow dispersion. So irritating. These KEFs claim to have wide dispersion and are movable. I will use as a sound bar. If they are as good as claimed (they SHOULD be at that price), then I may audition in my stereo system. Soon, KEF will have custom metal stands for $400? Sheesh. If my wife finds out, I'm in Big Trouble. [ HOYT  Jul 20, 2017 ]
Need a wireless system [ Larry  Feb 11, 2017 ]
Beautiful, Amazing sound (at least ive heard ) and been wanting to have a system with high power and DAC as well as bluetooth [ T  May 25, 2018 ]
ratings [ Ira  Mar 13, 2018 ]
great reviews [ Peter  Oct 29, 2017 ]
Great reviews and sound...... [ HARVEY  Aug 01, 2017 ]
highly reviewed. integrated with amp and da [ Anthony  Jun 07, 2017 ]
Color fits better in my room [ CLIFFORD  Mar 26, 2018 ]
Item I wanted available at open box price from reputable company [ Roger  Jul 26, 2017 ]
Great reviews and intended application for the new fireplace we are developing. [ JONATHAN  Jan 28, 2017 ]

9 questions already asked

No, but you should be able to connect an external phono stage to the unit's RCA AUX inputs. [ Jon  Nov 25, 2017 ]
Has analog input to add phono to ls50w. [ Jamie  Nov 23, 2017 ]
Sorry. I? don't know [ David  Nov 23, 2017 ]
No it does not have one built in, you would need to add a separate phono preamp [ Michael  Nov 23, 2017 ]
The reviews are not overrated. The LS50 Wireless speakers are worth the price and more. They are often compared to systems costing $10K - $50K, and the reviews are correct. The speakers are NOT overrated. [ Robert  Dec 27, 2017 ]
One way for me to describe how these KEFs sounds, is think of a pair of well amped Senn HD 800s (Original) without having to wear them. Bass is more pronounced. So definitely not thin sounding. [ David  Apr 07, 2017 ]
As speakers they are wonderful: full bodied sound. First rate. They are wonderful with music wired or wireless from any source. I use them with TV and they're great. They sound like speakers that would sell for many multiples of their price. That said, they are NOT surround sound -- just good ole stereo. But they image so well, I love them. Good bass. If you want thunderous bass, you can always add a subwoofer to them. [ CRAIG  Dec 27, 2017 ]
These are way better. I have them and can attest to their magnificent performance. You can also check some of the high end reviews (Stereophile, Audiophile, etc. and they compare these to some of the best $10K - $50K systems that they have heard. Buy them, you won't regret it. [ Robert  Dec 27, 2017 ]
A Ferrari replaces a Prius. Thats about all I need to say. [ BRUCE  Dec 27, 2017 ]
Sell your DAC, get these speakers. [ Robert  Dec 27, 2017 ]
No: it does have a pair of RCA jacks for analog input, but that input is converted to digital so it can do some DSP and ship the signal to the left speaker via an Ethernet cable. [ Jon  Oct 22, 2017 ]
Unfortunately you can't. It's really for those ho want the all in one solution. If you have a better standalone DAC, you're better off with the passive version. [ Ronnie  Oct 21, 2017 ] need a DAC with RCA out and then input that signal to KEF's RCA input. This will bypass the KEF DAC. [ HARVEY  Oct 21, 2017 ]
Yes you can, they have analog rca inputs, but know that they will be digitized again within the speaker. I have read online that some people did like/prefer the sound vs. the speaker as a stand-alone. But I will tell you the converters and electronics are so good in them, you probably won't want too. Highly recommend. [ Kevin  Oct 21, 2017 ]
No, however you would not want to. I had the Auralic Vega DAC ($3,500) and sold it together with Focal Speakers. Even if your DAC is better the sound coming out of the speakers likely would not be. There are other factors. For one the Built in DAC has a built in DSP to correct for phase shifts. An external dac does not. Secondly, the short digital wiring from the internal DAC to the speaker Amp has much less Jitter than the output wire of an additional external wiring would add. If you really want to get the best sound possible out of these things there are some critical things you could do that would improve the sound tremendously. Get the ISO accoustic 150 (newer delux version) stands. Secondly get IFI micro iUSB3.0 (and for further 10% improvemnt the Igalvanic too). Use shortest possible usb 3.0 cables. No more than 3.0 feet. Amazon Basic is really good. A great 2 head USB2.0 cable is the Pangea premium in comes in .5 meters 199. If it is a computer based system get the Dirac Live software to calibrate the system. MiniDSP sells a calibration mic for under $100 that is really good for the price. Get a good stand with decent weight. If you do get the calibration system you can change the ethernet cable the speaker is using to Audioquest Cinnamon (this will not be advisable unless you are calibrating the system since the cable with the speaker goes with the current settings characteristic of the speakers). If you sold your DAC and did all that your system would be better by another dimension. [ Aaron  Oct 21, 2017 ]
No you can't. I would consider buying the plain ls50s if you already have your own DAC. [ Vikram  Oct 21, 2017 ]
We don't have a way to track the blemishes and link them with each product (sometimes we have more than one in scratch & dent stock). If its important for the item to not have a blemish that can be seen, I recommend looking for open box items as those still have a price break over the brand new price but don't have any cosmetic blemishes My Bio: [ Paul  Oct 16, 2017 ]  Staff
You've already answered your own question, YES. [ Chris  Jun 07, 2018 ]
Sorry, I'm unable to answer your question. Suggest you contact KEF directly to determine what is currently shipping. [ PAUL M  Jun 06, 2018 ]
The short and sweet is to call KEF Customer support with your serial number in hand and talk to them. [ Robert  Jun 06, 2018 ]
I only know the answer for using wifi as the input source. Yes, you will have to turn on the LS50W manually for that input source. The LS50W doesn't have the feature to wake up by wifi connection request. As for shut down, it will shut down after not using for a while. I don't know how long. [ Lennart  Oct 28, 2017 ]
No. It doesn't have auto on. But there is a time out . The longest time out is 60 minutes of no input then it will automatically turn off. Neither the IOS app nor the Android app for LS50W can wake up the speakers. Obviously, you can use the remote to turn it on. As a workaround I used a Logitech Smart Hub (with built-in IR blaster). Then I use the Logitech harmony app from my phone to turn on the LS50W. With the Smart Hub, you can also link it to Alexa/Echo then you can use voice input to turn on LS50W. [ bschai  Oct 27, 2017 ]
Though most powered speaker systems like this will remember the previous source selected, there's no specific info that details the input source when the Kef LS50 speakers are initially powered on. If you would like to find that out for certain, you may want to contact Kef's Support directly--you can reach them by phone at 732-683-2356 or check out their support site: [ Larry  Apr 10, 2017 ]  Staff

Searches related to the KEF LS50 Wireless High-performance powered speakers with Wi-Fi® and Bluetooth®