LS50
The iconic LS50 was the physical embodiment of this singular approach. A loudspeaker that took its cues from the classic LS3/5A but was quickly recognised as a modern icon in its own right. The LS50 was born out of KEF’s willingness to think outsid...
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Specifications
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Design
Two-way bass reflex
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Model
LS50 Meta
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Crossover Frequency
2.1 kHz
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Frequency Range (-6 dB)
47 Hz - 45 kHz
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Frequency response (+/-3dB)
79 Hz - 28 kHz
All specifications
KEF LS50 Meta Speakers (Pair), Carbon Black
The iconic LS50 was the physical embodiment of this singular approach. A loudspeaker that took its cues from the classic LS3/5A but was quickly recognised as a modern icon in its own right. The LS50 was born out of KEF’s willingness to think outside the box, to constantly search for new materials, techniques and technologies such as the use of computer aided design and continuous enhancement of the KEF’s signature Uni-Q driver array.
That was 2011, and time and technology have moved on. Since then our engineers have been upholding KEF’s driving philosophy and searching out new technological breakthroughs. The result is an icon in waiting : the KEF LS50 Meta Standmount Speakers. Instantly recognisable as the successor of the LS50, the LS50 Meta is born of the same KEF desire for continual development and is therefore fittingly the first loudspeaker to employ Metamaterial Absorption Technology.
Revolutionary Sound Absorption with MAT
A result of joint development with the Acoustic Metamaterials Group, using Metamaterial Absorption Technology (MAT) breaks completely new ground in loudspeaker design, and once again demonstrates KEF’s unrelenting passion for developing new technologies to improve your listening experience. 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 tool in the KEF acoustic armoury, 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 With MAT Delivers
The tweeter in question sits at the heart of our 12th generation Uni-Q with MAT driver array. The Uni-Q point source configuration delivers a more detailed, accurate and integrated three-dimensional sound image, which is dispersed so evenly throughout the room that the ‘sweet spot’ is wherever you are in the room. Using simulation and analysis tools and decades of accumulated in-house knowledge, our engineers have developed a new iteration of KEF’s signature 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 completely exceeds the expectations of a modestly proportioned standmount speaker to deliver room-filling sound with deep, articulate bass.
Enhancement From LS50 Lineage
Much of the engaging performance is thanks to the clarity of the driver array, but the port design is also crucial. Using Computational Fluid Dynamics (CFD), the flare and profile of the LS50 Meta’s patented off-set flexible port is calculated to delay the onset of turbulence and the flexible port walls prevent resonances from colouring the midrange. This leads to improved clarity, with exceptional levels of depth and detail. The LS50 Meta’s extremely rigid cabinet is optimised for the best performance, with smooth curved surfaces that help radiate sound out across the baffle without any interference. The baffle itself is engineered from an injection-moulded Dough Moulding Compound (DMC) usually found in the automotive industry. 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.
Attention To Every Detail
The LS50 Meta has inherited its distinctive good looks from the original LS50, with its low-diffraction, curved baffle precision modelled around the Uni-Q driver array. The curved front is subtly mirrored by the gently radiused rear panel, while both the port exit and speaker terminals have been elegantly recessed and softened visually. On the LS50 Meta’s underside, each corner has a threaded inset allowing the speaker to lock onto the top of the new KEF S2 Floor Stand, which also boasts integrated cable management and a mass-loadable column. LS50 Meta is available at launch in four colours, all of which benefit from a modern silky matte finish, while the S2 Floor Stands are colour matched to the models. The LS50 Meta Standmount Loudspeakers deliver on every aspect of the KEF promise. A genuine industry first, LS50 Meta utilises innovative, ground-breaking technology to provide you with an immersive, completely believable sound from a compact, stylish loudspeaker that is destined to open up whole new vistas of enjoyment in your life.
Metamaterial Absorption Technology - eliminates 99% of high-frequency distortion for pure, natural sound
12th generation Uni-Q - with MAT driver array for exceptional acoustic accuracy
Driver Performance Optimisation - for enhanced sonic performance, less distortion and reduced coloration
Patented off-set flexible port - for reduced midrange coloration with exceptional levels of depth and detail
Optimised cabinet design - for best acoustic performance
With mounting inserts - to secure on KEF S2 Floor Stand (available as separate item)
General
Design
Two-way bass reflex
Functions
Crossover Frequency
2.1 kHz
Drive Units
Uni-Q Driver Array
HF: 25 mm (1 in.) vented aluminium dome with Metamaterial Absorption Technology
MF/LF: 130 mm (5.25 in.) aluminium cone
Frequency Range (-6 dB)
47 Hz - 45 kHz
Frequency response (+/-3dB)
79 Hz - 28 kHz
Harmonic distortion (90dB, 1m)
<0.4% 175 Hz - 20 kHz
<0.1% 300 Hz - 10 kHz
Nominal Impedance
8 Ω (min. 3.5 Ω)
Typical in-room bass response (-6dB)
26 Hz
Outputs
Power
Amplifier power (recommended)
40-100 W
Dimensions
Dimension (H x W x D) with terminals
302 x 200 x 280.5mm
Weight
7.8 kg (17.2 lbs.)
Opinions about KEF LS50 Meta Speakers (Pair), Carbon Black
Pros
The sound is bright and detailed, excellent bass. The case is very well dumped corps without the slightest prize.
Minuses
They lose in the appearance of my Aria 906 in varnish. The case looks like a plastic one, but taking in your hands, you immediately understand how well the engineers have worked on them. Acoustics are very weighty for their size. There are no protective grills.
Review
I took on a replacement for Focal Aria 906 without prior listening, I am based on a lot of laudatory reviews on the Internet, including “authoritative publications”. In my focals, I lacked the bass and I wanted more expressive than the middle. The sound of Kef is very expressive, detailed, transparent, with excellent bass and wide scene, but not mine. At the volume of about 3/4 from the maximum, the sound of the top becomes too sonorous and “unnatural”, for my taste. I probably got used to the velvety high Aria. Once again, acoustics are very good and detailed, but it needs to be listened to yourself. I will have to give it to the parents.
Translated from pult.ru
Original reviews
Pros
UNI -Q driver - another sound level
Minuses
For shock bottoms, you will need a subwoofer
Review
Tired of fighting a rather boring (someone will call him “neutral”) sounding Wharfendale Reva -4 by replacing the wires, decided on the only true step - to find for them a new owner, and to himself a new “pet”.
Given the move to a relatively small room (18 sq. M, a panel 17 -story building), shells became a landmark, in the future and if necessary - the transition to Tryphonics.
I will not delve into the details, as I chose and what. Ultimately, the choice has narrowed to LS50 META and KEF R3. Given personal preferences (the details of the upper reaches and the width of the scene) stopped at the first. R3 is more about depth, if anyone is interested.
As a result, on LS50 META:
A surprisingly wide scene and detail that reveal the sound of many genres and compositions in a new way.
Sufficient "bottoms" for listening at a small and medium volume. Yes, “South of Heaven” from Slayer will not beat your chest, but the way the barrel clicks on the “meta” and reefs sound no less pleasure. "Wish You Were Here" Pink Floyd will amaze with a drive, and the excellent collection of Midsummer Classics from the distant 90s is detailed and contrast.
The way these columns sound with vinyl is generally a separate conversation. When the usual “warmth” of LP is complemented by such a wide scene, it is expensive.
Like pleasant bonuses, in addition to obvious shells (compact size, for example) - the ability to put them quite close to each other and almost any height (thanks to the "wall of sound" that they give out).
In general, in my opinion, today these are just the best shellputs from mass manufacturers.
With which I "made friends":
Cambridge 851a
Pro-Ject 1xpression III Carbon table, Sumiko Pearl cartridge
Cambridge 640p
CD Cambridge 651c
Acoustic wires ZU Audio Libtec
Communication: Table - Chord Chameleon, CD - Black Rhodium Harmony
Translated from pult.ru
Original reviews
About brand
KEF
KEF is a proud pioneer of excellence in sound.
Since 1961, from UK home, we have created remarkable – award-winning – speakers. From ground-breaking Uni-Q technology to bar-setting LS50 Wireless, KEF exists to fill rooms with music as it was made to be heard, to move souls with truly authentic soundscapes.
Find out more about KEF