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KEF LS50 Meta Bookshelf speakers (Royal Blue)

Item # 991LS50MRB

KEF brings technological innovation and improved cabinet design to the already impressive LS50 series.

KEF brings technological innovation and improved cabinet design to the already impressive LS50 series.

16 questions - 41 answers

Item # 991LS50MRB

Low stock
$1,599.99 pair

Other options

About the KEF LS50 Meta

Eric A.

Innovative bookshelf speakers

KEF hit a home run in 2011 when they introduced LS50 bookshelf speakers. In the intervening years, they've learned new tricks that make the KEF LS50 Meta even more impressive.

Innovative bookshelf speakers

Metamaterial close up from KEF LS50 Meta speaker

Innovative Metamaterial Absorption Technology (MAT) absorbs high-frequency vibrations to eliminate distortion in KEF LS50 Meta speakers.

KEF hit a home run in 2011 when they introduced LS50 bookshelf speakers. In the intervening years, they've learned new tricks that make the KEF LS50 Meta even more impressive.

Revolutionary sound absorption

This speaker gets the "Meta" part of its name from KEF's new and innovative Metamaterial Absorption Technology (MAT). It's a highly complex, mazelike structure that's tuned to absorb unwanted sound coming from the rear of the tweeter. The resulting sound is clear, purer, and more detailed. 

Careful cabinet design

The LS50 Meta's extremely rigid cabinet uses smooth, curved surfaces that help the sound radiate outward without distortion. It also features a patented offset, flexible port for reduced midrange coloration. As with previous LS50 models, the cabinet use a grille-less design to show off the cool-looking driver array.

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. This lets the LS50s create a detailed and accurate three-dimensional sound image. This makes the "sweet spot" (the ideal listening position) much larger. Sit wherever you like — you'll have fantastic sound throughout your room.

Maximize your listening experience

LS50 Metas can deliver truly incredible sound — in the right setup. We recommend 100 watts or more from a high-performance power amp or integrated amp.

Proper speaker placement is also crucial to getting the best performance out of the LS50 Metas. Placing them on a pair of color-coordinated KEF S2 speaker stands helps eliminate unwanted vibrations and reflections. Read our article on stereo speaker placement for positioning and set-up tips.

And few things add impact to your listening session like solid bass. Add a powered subwoofer to your stereo listening setup for hard-hitting, musical low end.


Product highlights:

  • Uni-Q® driver array technology makes your entire room sound like the "sweet spot"
  • 5-1/4" aluminum cone woofer
  • 1" vented aluminum dome tweeter
  • innovative Metamaterial Absorption Technology (MAT) absorbs high-frequency vibrations to eliminate distortion
  • Driver Performance Optimisation for enhanced sonic performance and reduced distortion
  • frequency response: 79-28,000 Hz (±3 dB)
  • sensitivity: 85 dB
  • impedance: 8 ohms
  • recommended amplifier power: 40-100 watts
  • curved baffle design ensures smooth soundwave dispersion with minimal reflection
  • two-way bass-reflex cabinet with patented offset, flexible port for reduced midrange coloration
  • 5-way binding post speaker terminals
  • high gloss finish
Dimensions and warranty:
  • 7-15/16"W x 11-15/16"H x 11"D
  • weight: 17.2 lbs. (each)
  • warranty: 5 years

What's in the box:

  • 2 Bookshelf loudspeakers
  • 2 Foam port plugs
  • 8 Self-adhesive rubber feet
  • Owner's Manual
  • Warranty Registration Card

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More details on the KEF LS50 Meta

Stacey B.

Features & specs

Enclosure Ported
Finish MDF/Polymer
Color Blue
Tweeter Type Hard-Dome
Tweeter Size (inches) 1
Midrange Size (inches) N/A
Woofer Size (inches) 5.25
Woofer Composition Aluminum
Woofer Surround Rubber
Power Range 40-100
Sensitivity 85 dB
Impedance (Ohms) 8
Frequency Response 79-28k Hz
Connector Type Binding post
Bi-amp Inputs No
Height (inches) 11-13/16
Width (inches) 7-7/8
Depth (inches) 11-1/16
Weight (pounds) 17.2
Wall-mountable No
Bracket Included No
Recommended Stand Height (inches) 25-30
Parts Warranty 5 Years
Labor Warranty 5 Years

Product Research


Metamaterial Absorption Technology (MAT): KEF teamed up with the Acoustic Metamaterials Group (AMG) to use Metamaterial Absorption Technology (MAT) in their LS50 Meta loudspeaker. Metamaterials are specially developed structures that use existing materials in such a way that they exhibit new, desirable properties that are simply not found in naturally occurring substances. A truly revolutionary technology, MAT is a highly complex maze-like structure, where each of the intricate channels efficiently absorbs a specific frequency. When combined, the channels act as an acoustic black hole, absorbing 99% of the unwanted sound that comes from the rear of the tweeter, eliminating the resulting distortion and providing a purer, more natural acoustic performance.

12th Generation Uni-Q Driver Array: The LS50 Meta bookshelf loudspeaker utilizes KEF's patented 12th Generation 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". Using simulation and analysis tools and decades of accumulated in-house knowledge, KEF engineers developed a 12th Generation Uni-Q driver array, with a new cone neck decoupler and motor system that is precisely shaped to reduce high-frequency distortion in the mid-frequency driver. The result is reduced coloration, less distortion and a sound that is more transparent and life-like than previously possible. The same can also be said of bass performance, where LS50 Meta exceeds the expectations of a modestly proportioned bookshelf and standmount speaker to deliver room-filling sound with deep, articulate bass.

  • 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" Aluminum Cone Woofer: The 5.25" woofer uses an Aluminum cone that is light, stiff, and smooth for natural midrange and midbass sound. As 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.

Advanced Cabinet Design: From the precision molded curved baffle to the solid, reinforced cabinet, every inch of LS50 Meta has been designed to perform. Every aspect of LS50 Meta has been considered for acoustic benefits and from a design perspective. The low-diffraction curved front baffle is subtly mirrored by the gently radiused rear panel, where both the port exit and speaker terminals have been elegantly recessed and softened visually.

  • Rigid Cabinet Bracing: The LS50 Meta’s extremely rigid cabinet is optimized for the best performance, with smooth curved surfaces that help radiate sound out across the baffle without any interference. Inside the cabinet, cross bracing and Constrained Layer Damping (CLD) combine to deaden internal vibrations. The result of such meticulous attention to detail is that LS50 Meta produces the lowest coloration of any speaker in its class.
  • Robust Curved Baffle: LS50 Meta's baffle is engineered from an injection-moulded Dough Moulding Compound (DMC), usually found in the automotive industry. The LS50 Meta's low-diffraction, curved baffle is precision modelled around the Uni-Q driver array. It’s smooth curved surfaces help radiate sound out across the baffle without any interference from hard edges, which cause diffraction. The result is cleaner, more precise sound.
  • Flexible Port Design: Using Computational Fluid Dynamics (CFD), the port flare and profile of LS50 Meta's patented off-set port is calculated to delay the onset of turbulence, and the flexible port walls prevent resonances from coloring the midrange. This leads to improved clarity, with exceptional depth and detail. Two foam port plugs are included to seal the cabinet if the bass is too "boomy" because of speaker placement.

Note: No grilles are included with the KEF LS50 Meta.

Binding Post Terminals: On the back of the KEF LS50 Meta's speaker cabinet is a pair of heavy-duty binding post terminals to connect your speaker wire (sold separately). The binding post terminals will accept bare wire (up to 10AWG), pin-connectors, spade-lugs, and banana plugs (single only).

Mounting & Placement Options: The KEF LS50 Meta bookshelf loudspeakers can be simply mounted on a stand, shelf, table top, or other flat surface. The KEF S2 speaker stand (sold separately; see Accessories Tab) is custom-designed specifically for the LS50 Meta bookshelf speaker. Eight self-adhesive rubber feet (four for each speaker) are included to provide a secure non-slip, protective mounting surface. The feet add approximately 0.1875" to the overall height of the speaker.

  • The LS50 Meta bookshelf loudspeaker should be mounted 25" to 30" from the floor.
  • The speaker should be spaced 7.875" to 19.6875" from the rear wall, and 19.6875" to 39.375" from the side wall.
  • A pair of LS50 Meta speaker should be spaced 6' to 10' apart, and "toed" in slightly (0-15 degrees) to the main listening area.
Note: There is no included bracket, keyhole slot, or threaded insert to wall-mount the speaker.

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Customer Q&A

16 questions already asked

Can these speakers be mounted on Pangea Audio LS300 stands?
mark  Aug 28, 2023
1 answer
Potentially, Mark. We do not pair the LS300's with the KEF LS50 Meta's due to the fact that the LS300 stands have a 6"x 6" top plate included which I would consider too small for a stable platform with the KEF's, which measure 7-7/8" wide by 11-1/16" deep. You have some options. If you want to use your LS300's you can add the larger optional top plate in the first link below, stepping up to 6"x 9" for a more stable platform. The DS400's from Pangea in the second link below are a little sturdier and come with a larger top plate included, we pair the DS400's with the KEF and they work well! html
bo  Aug 28, 2023 (Staff)
I'm interested in using the KEF LS50 Metas as my front speakers in my surround system. I'll be upgrading my A/V receiver once the new Sony STR-AN1000 is available. My question is will that receiver have enough power for the KEF'S? I already have a powered sub woofer.
mark  Feb 22, 2023
1 answer
Absolutely, Mark. The Sony STR-AN1000 is a fantastic new offering from Sony, and it is rated at 120-watts at 6-ohms. This would put it as a perfect pick for the 8-ohm KEF's which can handle around 100-watts max. The Sony will put out a little less power to an 8-ohm speaker, but it is still exactly what you need for the KEF's. We can get you locked in on a backorder at the link below risk free. If you want to secure your spot in line for the Sony, we do not charge you for a backorder until the item is in the box and on the way to you!
bo  Feb 22, 2023 (Staff)
I am using my Kef LS50 Metas, full range, with a pair SVS 3000 Micro subwoofers. I love the sound of the LS50 Metas but the woofer can distort or break up at fairly loud volumes or with bass heavy music. I am very interested in using a high pass crossover to relieve them of bass duties. What high pass crossover over frequency, and slope (12db, 18db, or 24db/octave), works best with these? What should I then set the low pass frequency slope on my subs to blend properly? Thanks!
lanny  Oct 19, 2022
1 answer
The topic of crossover settings for the LS50 Meta and an accompanying sub is partly a matter of preference and partly a matter of room acoustics, speaker placement, and whether or not the ports are partly or fully plugged on the speakers themselves. If you ordered these items directly from Crutchfield, feel free to contact our Tech Support team. They can help you work through the process of finding the best settings for your application. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
zachary  Oct 20, 2022 (Staff)
Would these pair with Kef R11 as rears?
don  Apr 14, 2022
2 answers
They will pair well enough in terms of having a similar sound signature due to the comparable tweeter, but if the room is large enough for an R11 setup then you may want to try to go for the R3 as rears if the extra size and cost can be comfortably accommodated. I have R11 as fronts and R7s as rears and that is what I've found to be ideal in my room (30' x 40' with 18' ceilings). I also have the LS50 Metas in another location that is much smaller (14'x14' with 8' ceilings)Z
david  Apr 16, 2022
You could certainly do that. When I bought my Metas, I moved my original LS 50 which I've had for 6 years to rear surround duty. OTOH, it might be more economical to scout around for a use pair of the originals to use in the less critical duty of surrounds.
neal  Apr 16, 2022
Where are they made?
mikeman  Oct 23, 2021
2 answers
China. But don't hold that against them!
mark t  Oct 23, 2021
"Designed and Engineered in the UK, Made in China"
michael  Oct 23, 2021
Why is this pair of speakers discounted?
gary  Sep 19, 2021
1 answer
If you are speaking of the ones listed in our Scratch & dent stock, these open-box items have minor cosmetic damage. In some cases the manufacturer's accessories have been replaced with generic equivalents. The manufacturer's warranty applies.
kenneth  Sep 20, 2021 (Staff)
Hi wondering if the KEFLS50 Meta would be appropriate for nearfield listening (e.g. about 2 to 3 feet from listener's ears on a desktop? Thank you!
william  May 01, 2021
7 answers
I've had the LS50 Metas since December and really like them. I also have 2 pairs of LSXs. In my opinion, the LS50s would be too large for near field listening. For me, the LSXs would be pushing it as well, but you would probably be OK with those. They also sound fantastic. My desk area (near field listening) is rather large and the LS50s would still be too large. I currently use a pair of genelec monitor speakers for my near field listening.
thomas  May 02, 2021
Yes they are great in the near field. I love mine
robert c  May 02, 2021
For a desktop and at 2 to 3 feet listening the KEF LSX would probably be better.
arthur  May 02, 2021
I'm no expert but I use mine that way and they sound great. I have a Schiit amp/preamp connected to a cheap audioengine DAC and a SVS 3000 subwoofer. Upgraded from audioengine HD6, there is significant improvement in the low and mids but worth upgrading? Debatable. These speakers work best for me when I'm away from the wall. I shifted my desk perpendicular to the wall instead of parallel. The improvement was in the soundstage but that may just be my room.
austin  May 01, 2021
I use it for near field listening on my desktop PC, using IsoAcoustics stand to elevate the speaker to my ear level. As my desktop is not against a backwall nearby, I did not have to use the form to plug the backport and they sound fantastic (crisp and great precision).
takeshi  May 01, 2021
I would recommend nothing more than six inches from your ears. Seriously though, yes...they are best as nearfield monitors.
jared  May 01, 2021
If this is your use case, I would recommend the KEF LSX Wireless speakers. They are smaller and better for desktop/nearfield listening (I have both LS50 Meta and LSX), and also integrate over wifi with Roon, Spotify, etc. No bones about it, though, for passive bookshelf speakers in this or any class the LS50 Metas are incredible (and also a big step up from the former LS 50 incarnation).
michael  May 01, 2021
Can my Mcintosh MA-5200 do these little bookshelf speakers justice? This is for a mixed-use setup that includes a powered subwoofer.
robert  Jan 31, 2021
5 answers
I would say the Mcintosh would sound great with the Metas. They do love the warmth from my Rega Elex R.
robert c  Feb 01, 2021
They will love the warmth that ur Mcintosh will provide. Sounds like a good pairing to me.
robert c  Feb 01, 2021
I do not have experience with your Mcintosh, but I do believe that it would have sufficient power to do the Metas justice. One reviewer found that the MA-5200 has around 185 watts into 4ohms, and from what I've heard Mcintosh amps typically have plenty of current, which should work pretty well. I personally have 700 watts into 4 ohms and it definitely handles the Metas with ease. Fortunately, Crutchfield has an excellent return policy if you're not 100% happy.
david  Jan 31, 2021
Yes, I would think that would be a nice combination.
arthur  Jan 31, 2021
Depends on how many watts your amp is. 50 watts minimum, 100 watts optimal
judy  Jan 31, 2021
Thoughts on using these as main speakers for a home theater setup with a decent receiver like a Marantz SR7015?
sanjay  Jan 03, 2021
3 answers
Of course . These speakers are definitely Main Speakers. Top of the line. You have 125 watts Per Channel ,more than enough.
chris  Jan 03, 2021
My system is setup for music only, and I've paired with a Yamaha A-S801. This paring is the foundation of upgrading a 20 year old hifi system. I tested multiple floor standing and bookshelf loudspeakers, over multiple months, before selecting the "Meta". The Meta are crisp and clear, and neutral to my ear. The fullness of sound is astounding to me; as I did not believe such dynamic sound quality could be achieved with a bookshelf speaker...boy was I wrong. I have no doubt they can anchor a home theater with a quality receiver like the SR7015. The Meta is absolute listening pleasure.
brad  Jan 03, 2021
You can't go wrong with kef . Love the receiver
robert  Jan 03, 2021
Can my Rega Brio integrated amp drive these?
taylor  Dec 28, 2020
10 answers
Personally, I'd look at something in Class D like the Purifi, or if you're on a budget, a lot of OEM manufacturers make a Hypex NCore 252 (like VTV) in the range of $500 which will do the trick nicely with a smaller form factor, less heat, and over 200wpc into 8 ohms, so plenty of power.
neal  Apr 16, 2022
Yes the Brio works well. I am currently using the Elex R and it is a great pairing with the Meta and a step up from the Brio.
robert c  Dec 29, 2020
It depends on the kind of music you listen to, the size of your room and how loudly you listen. The meta's are relatively inefficient and the impedance is 4 ohms. They need a lot of power and ideally a high current amp to play loudly. My amp can deliver 500 Wpc into 4 ohms and drives them well in my 13' x 16' room. It can drive them to play loudly,well beyond their sweet spot, but if you like to listen loud or have a large room I am not sure the Rega would have enough power. If you have a smaller room and listen mainly to acoustic stuff it would probably be fine.
john  Dec 29, 2020
The sensitivity of these speakers is 85db (lower than average by 3db). A 50 watts per channel amp can drive them, but you'll be higher up the volume scale for comparatively less output (and potentially more distortion). These are also 8 Ohm rated but bottom out at 3.5 which is a demand that some amps may struggle with. If your current speakers are higher sensitivity I think these may not compare well mated with your current amp. If your music content is not bass heavy and your normal volume level is low then they may be great! I'm driving mine with a peachtree nova 150.
james g.  Dec 28, 2020
My 2 cents... While the Brio may technically work with the Metas, there are definitely caveats and the Metas will only reach their full potential with higher power and higher end amps. That is a good and bad thing, IMO. First the downsides, as I see them. You won't be able to listen very loud with the Meta/Brio combo, and regardless the amp is going to run hot. Stereophile wrote of the Metas "The partnering amplifier needs to be comfortable driving 4 ohms" and of the Brio "Continued high-level use into 4 ohms may cause the case to exceed 40°C above the ambient temperature." Also, the Brio won't be able to extract the full bass/dynamic potential of the Metas, from what I can tell (I own the Metas, but not the Brio). However, since the Metas are true high end speakers with reference-grace performance, if you ever decide to upgrade anything else in the chain, the Metas will reward your efforts. Short answer: They do need more power to perform their best, but may work if you are fine listening in a small-ish room and/or at lower levels. Hope this helps, cheers!
david  Dec 28, 2020
What a coincidence! Short answer: yes, but you might not be pleased with the result, as suggested by a review I recently saw from the U. K., which said: "Case in point comes when I switch over to the Rega Brio. I love this amp and I have in the past run speakers up to and including the Focal Kanta No1 on it and thoroughly enjoyed the results. Its partnership with the KEF was - bluntly - not good" Personally, I drove the first-gen LS50s with the Rega up-model Elex-R (otherwise a very good amp) for awhile but found output from the combo to be too hard in the upper midrange for my ears. So I would advise: approach with caution, Taylor.
mark t  Dec 28, 2020
You need at least 80-100 watt amp to drive these speakers. Good entry level is Rogue Sphinx integrated amp.
judy  Dec 28, 2020
At 50 watts per channel the Rega amp should be fine. A more powerful amp would probably sound better.
arthur  Dec 28, 2020
I have no idea but they are great speakers. I run them with a Yamaha rxa3080 - Good Luck
gary  Dec 28, 2020
That might be pushing it. I have 2 sets of LS50's and 1 set of LS50 Meta's. 50wpc drives them but after hearing them on a much more powerful amp the difference is significant. I had a Emotiva TA100 and a Marantz 50wpc AVR driving 2 sets. I replaced the TA100 with a Cambridge Audio CX-81 and it was night and day. Granted a much better amp but they liked the wattage. I plugged them into my main setup which is a 500wpc Emotiva amp on a Yamaha RXA-3080 and they just like the wattage.
eric  Dec 28, 2020
how do you guys feel about matching this with a AXR100 from cambridge?
jonathon e  Nov 15, 2021
1 answer
Thanks for your question. For information on comparing different models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget.
kenneth  Nov 20, 2021 (Staff)
Just got the LS50s. Would the Marantz NR1200 be strong enough to work with these speakers? Thanks!
brad  Feb 25, 2021
2 answers
The KEF LS50s should be treated as 4 ohm speakers even though they are rated at 8 ohms. Will your amp drive them? Yes. But I believe you would unlock the true potential of these speakers with an amplifier which provides more power.
brian  Feb 27, 2021
The LS50 Meta are recommended for 40-100 watts per speaker. The NR1200 puts out 75W per channel so it should be more than adequate to drive the speakers.
austin  Feb 25, 2021
Iâ??m looking to pair these with Sonos amp to work in its ecosystem, will that amp be suffice?
alexis  Feb 09, 2024
1 answer
The KEF LS50 Meta speakers can handle a maximum of 100-watts RMS, Alexis. While the Sonos amp would work very well with these, it delivers 125-watts RMS which would have the potential for overpowering them and not a match we would advise. If you do decide to pair the Sonos amp with the KEF LS50 Meta's, you will need to use the Sonos app to setup a volume limit on the amp to ensure that you did not overpower your KEF's and potentially damage them.
bo  Feb 10, 2024 (Staff)
Can I plug a record player directly into these?
oliver  Oct 09, 2022
1 answer
No. These are passive speakers that require an amplifier or receiver for power. The KEF LS50 Wireless II are the powered version of these speakers that offer an AUX input, which would allow the connection of a record player with a built-in phono preamp. If your record player does not include a phono preamp, then a separate phono preamp would be necessary. Here's a link to the LS50 Wireless II:
zachary  Oct 09, 2022 (Staff)
Would a single Schiit Aegir be a good amplifier match for these speakers? Thinking of getting one of those, or a Vidar - seems like the Aegir matches my preference better, but wanted to check if anyone has any experience using a single one, or whether monoblocks would be a better match?
aaron  Jan 20, 2021
2 answers
The speakers are magnificent. Maybe check-in with the Crutchfield techs on the amp(s). My guess: single works, but won't generate stupendous volume. Mono (x2): check compatibility of the ohm rating
alec  Jan 20, 2021
Hi There, I actually am utilizing right now in a bookshelf front right front left on a surround system.. However once I get my listening room set up I will be placing on a Class A Amp. I have looked at both the Aegir and Vidar and like the Aegir for this application. However I have not heard this amp in action. Not much help here but appreciate the info on the Schiit. Dave.
david  Jan 20, 2021

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