{"id":1843,"date":"2020-12-17T22:36:59","date_gmt":"2020-12-17T22:36:59","guid":{"rendered":"https:\/\/thenextweb.com\/?p=1332411"},"modified":"2020-12-17T22:36:59","modified_gmt":"2020-12-17T22:36:59","slug":"review-kefs-ls50-meta-upgrades-an-audiophile-fave-to-near-perfection","status":"publish","type":"post","link":"https:\/\/www.londonchiropracter.com\/?p=1843","title":{"rendered":"Review: KEF\u2019s LS50 Meta upgrades an audiophile fave to near-perfection"},"content":{"rendered":"\n<p>It\u2019s pretty much impossible to navigate an audiophile forum without somebody mentioning KEF\u2018s LS50 speakers within a few pages. Created in 2012 to celebrate the 50th anniversary of another classic by the venerable audio company, the LS3\/5a, the LS50 went on to receive rave reviews by media and users alike. The speaker\u2018s coincident \u2018Uni-Q\u2019 driver \u2014 in which the tweeter and woofer project sound from the same physical point in space \u2014 has become iconic.<\/p>\n<p>But if I\u2019m being honest, I never really loved them. They were definitely good speakers, and I did love the <a href=\"https:\/\/thenextweb.com\/insider\/2018\/04\/26\/review-kefs-ls50w-best-gateway-world-hi-fi-speakers\/\">wireless version<\/a> which used built-in digital signal processing to refine the sound, but the original LS50 always struck me as a little harsh and bright.<\/p>\n<p>The new LS50 Meta fixes all that. It is a remarkable little speaker that delivers some of the best performance I\u2019ve seen for a speaker in this price range without DSP. And mercifully, KEF kept the same $1,500 price as its predecessor \u2014 expensive for your average person, but very reasonable in the world of audiophilia.<\/p>\n<p>While it looks nearly identical to its predecessor, the LS50 Meta is completely redesigned on the inside, with changes to the cabinet design, port, drivers, and crossover. The most significant change \u2014 or the most marketable one, at least \u2014 is the use of a new \u201c<a href=\"https:\/\/en.wikipedia.org\/wiki\/Metamaterial\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">metamaterial<\/a>\u201d that sits behind the Uni-Q unit to absorb the rear radiation of the driver that has the potential to muddy the sound.<\/p>\n<p>This metamaterial disc looks like one of those little mazes you played with as a kid:<\/p>\n<p><iframe loading=\"lazy\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Q9k9IhNTxtk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen>[embedded content]<\/iframe><\/p>\n<p>Each of the \u2018paths\u2019 of this maze-like structure is tuned to cancel out a specific frequency, which when combined can \u201cabsorb 99% of the unwanted sound radiating from the rear of the driver, reducing distortion and enabling the prevention of audio distraction.\u201d The company goes into detail about this in its <a href=\"https:\/\/us.kef.com\/pub\/media\/wysiwyg\/ls50\/20-KEF-LS50-Collection-WhitePapers.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">whitepaper<\/a>, to clear results. It\u2019s a truly impressive bit of engineering.<\/p>\n<p>I can\u2019t say how much of an audible difference the metamaterial makes on its own given all of the changes to the new version. The speaker as a whole, however, has transformed into something that is at the state of&nbsp;the art.<\/p>\n<h3>The Sound<\/h3>\n<p>Out of the box, no \u201cburn-in\u201d required, I thought the LS50 Metas sounded nearly perfect. While I found the original LS50 was a bit on the \u2018cold\u2019 and \u2018harsh\u2019 side of the neutrality spectrum, the Meta, if anything, tilts ever so slightly in the \u2018warm\u2019 direction.<\/p>\n<p>The Meta\u2019s manual recommends listening to the speakers off-axis. This means they should not be pointed directly at your listening position, but rather angled to fire straight forward or at just a slight angle.<\/p>\n<p>Positioned as such, the speakers project a very transparent sound that if anything seemed just a hair laid back. Whether this is a good or bad thing is up to you; I sometimes prefer my speakers to be a little more forward, but some might like the slightly gentle attack on the Metas.<\/p>\n<p>But really, I\u2019m splitting hairs: the overarching impression I got of the LS50 Meta was neutrality and transparency that is basically as good as a studio monitor.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1331641 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4.jpg\" alt width=\"1640\" height=\"1640\" sizes=\"(max-width: 1640px) 100vw, 1640px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4.jpg 1640w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-96x96.jpg 96w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-210x210.jpg 210w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-270x270.jpg 270w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-135x135.jpg 135w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-796x796.jpg 796w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-1592x1592.jpg 1592w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-192x192.jpg 192w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-1472x1472.jpg 1472w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-1104x1104.jpg 1104w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-912x912.jpg 912w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-550x550.jpg 550w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-470x470.jpg 470w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-1-of-4-1200x1200.jpg 1200w\"><\/figure>\n<\/p>\n<p>One of the strengths of KEF\u2019s Uni-Q driver is its ability to create a stable soundstage that doesn\u2019t change too much in timbre as you move around your listening position, whether you\u2019re sitting or standing up. That\u2019s present here too, and the Metas nicely balance soundstage width with spectacular&nbsp;imaging precision. I do tend to prefer speakers with a still wider soundstage, such as the <a href=\"https:\/\/thenextweb.com\/plugged\/2019\/11\/12\/review-focals-chora-806-is-a-luxury-speaker-at-a-heck-of-a-price\/\">Focal Chora 806<\/a>, but that width usually comes at the expense of imaging \u2014 how sharp invisible sources of sound appear to be \u2014 so your mileage may vary.<\/p>\n<p>As a small passive&nbsp;speaker, you shouldn\u2019t expect room-shaking bass from the Meta, but they will do a decent job if most of what you listen to is acoustic music \u2014 audibly producing sound into the 40Hz region if not too far from a wall. Despite their small size and 5-inch woofer, they also had better dynamics than I expected. Not as good as, the aforementioned Focal, which has a larger woofer without a tweeter taking up space in its center, but better than other 5-inch speakers I\u2019ve tested.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1319178 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f.png\" alt width=\"1640\" height=\"912\" sizes=\"(max-width: 1640px) 100vw, 1640px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f.png 1640w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f-280x156.png 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f-486x270.png 486w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f-243x135.png 243w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f-796x443.png 796w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/09\/Snag_2622cc2f-1592x885.png 1592w\"><\/figure>\n<\/p>\n<p>But if you want to take your hi-fi experience to the next level, I always recommend speakers be paired with subwoofers, and the Meta particularly benefits from it. Once I turned my sub on, the Metas seemed to open up now that the 5-inch woofer was relegated to only handling higher frequencies. With a sub handling the lowest frequencies, differences compared to larger speakers become vanishingly small.<\/p>\n<p>Lastly, I should note the LS50 Meta seemed to be exceptionally good at revealing details at low volumes. I\u2019m not sure if this is because of the metamaterial lowering distortion or some other tweak, but it was a quality I repeatedly noticed in my months with the Meta.<\/p>\n<h3>The data<\/h3>\n<p>As usual, I listen before I perform speaker measurements. But as we\u2019ll see, the data largely reinforces my listening impressions.<\/p>\n<p>Using a <a href=\"http:\/\/audio.claub.net\/software\/FRD_Blender\/White%20Paper%20-%20Accurate%20In-Room%20Frequency%20Response%20to%2010Hz.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">technique<\/a> that allows me to reduce the influence of reflections from my measurements, I can approximate the speaker\u2018s \u201ctrue\u201d sound as it would be measured in an anechoic chamber. We begin with a graph called a \u2018spinorama,\u2019 so-called because it involves rotating the speaker around its horizontal and vertical axes to capture its sound at 70 different angles.<\/p>\n<p>The spinorama summarizes those multitudinous data points into one simple graph, giving us a useful summary of both the speaker\u2018s direct sound and how it radiates sound into a room. This single graph is usually enough to separate the good speakers from the bad ones.<\/p>\n<p>Here is the spinorama I captured for the LS50 Meta:<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332415 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama.png\" alt width=\"1200\" height=\"963\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama-262x210.png 262w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama-336x270.png 336w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama-168x135.png 168w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spinorama-796x639.png 796w\"><\/figure>\n<\/p>\n<p>Explanations of how to interpret these lines are provided over at&nbsp;<a href=\"https:\/\/speakerdata2034.blogspot.com\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Speaker Data 2034<\/a>&nbsp;and&nbsp;<a href=\"https:\/\/www.audioholics.com\/loudspeaker-design\/understanding-loudspeaker-measurements\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Audioholics<\/a>. Here\u2019s my summary if you think the above lines might as well be rainbow spaghetti:<\/p>\n<ul>\n<li>The On-Axis and Listening Window curves represent the \u2018direct\u2019 sound of the speaker before any reflections, and they should be relatively flat. The On-Axis is measured with the speaker aimed directly at the microphone, while the Listening Window is an average of 9 measurements within a \u00b130\u00b0 horizontal \u00b110\u00b0 vertical window. This accounts for the fact most people don\u2019t sit perfectly still or centered, so it is generally the more important of the two. As the first and loudest sounds to arrive at our ears, the direct sound has a huge impact on our perception of tonality.<\/li>\n<li>The rest of the curves focus on the indirect, or \u2018off-axis\u2019 sound \u2014 the sound that will reflect off your walls. The Early Reflections is particularly important, as it is an average of several angles that estimate the very first bounces off your walls, floor, and ceiling to reach your ears. These reflections contribute significantly to our impressions of tonality and soundstage (the latter being particularly affected by horizontal reflections).<\/li>\n<li>The ER curve should generally tilt down by roughly 8-10dB from 20Hz to 20kHz, though it can vary for speakers with unusual directivity characteristics. The most important thing is that its shape roughly match the direct sound, indicating the reflected sounds are similar in character to the direct sound.<\/li>\n<li>The Sound Power curve represents an average of the speaker\u2018s sound in&nbsp;<em>all<\/em>&nbsp;directions. It\u2019s not as useful as the other curves for speakers that mostly radiate sound forward, but it should generally look like an even steeper version of the ER curve.<\/li>\n<li>The Predicted In-Room Response curve estimates how a speaker will measure in a real room by combining data from the LW, ER, and SP curves. For the majority of speakers, the PIR curve looks&nbsp;<em>very<\/em>&nbsp;similar to the Early Reflections curve, so it is often omitted.<\/li>\n<li>The Directivity Index and Early Reflections DI curves tell us how similar the off-axis sound is to the direct sound. These are calculated by subtracting the Sound Power and Early Reflections curves from the Listening Window, respectively. Smooth DI curves suggest the off-axis and direct are similar, which bodes well for the soundstage. Good DI curves also imply a speaker will respond well to equalization.<\/li>\n<li>You generally don\u2019t have to worry about what happens above 10kHz, as most people can\u2019t hear much up there and music tends to have little content in this region anyway.<\/li>\n<\/ul>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1331643 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4.jpg\" alt width=\"1640\" height=\"924\" sizes=\"(max-width: 1640px) 100vw, 1640px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4.jpg 1640w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-280x158.jpg 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-479x270.jpg 479w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-240x135.jpg 240w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-796x448.jpg 796w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-1592x897.jpg 1592w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-3-of-4-1200x675.jpg 1200w\"><\/figure>\n<\/p>\n<p>The LS50 Meta performs almost perfectly in all metrics. Its one significant flaw is a scoop centered around 2.5 kHz, and this is likely the source of the slightly laid back sound I noticed in my listening impressions (check out <a href=\"https:\/\/diyaudioheaven.wordpress.com\/tutorials\/how-to-interpret-graphs\/frequency-response\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">this article<\/a> for more on how different deviations can affect sound). Some people might not even mind this dip, as it affects the region where our ears <a href=\"https:\/\/en.wikipedia.org\/wiki\/Equal-loudness_contour\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">are most sensitive<\/a>.<\/p>\n<p>On-axis, the speaker has a slight amount of excess energy at 4kHz, but it is essentially irrelevant as the speaker is designed to be heard off-axis.<\/p>\n<p>But wait, there\u2019s more! In an extremely rare act for a big-name audio company, KEF publicly provides a spinorama of its own <a href=\"https:\/\/us.kef.com\/pub\/media\/wysiwyg\/ls50\/20-KEF-LS50-Collection-WhitePapers.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">its whitepaper<\/a>. I have digitized that data and matched its scale for ease of comparison with my own:<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332417 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin.png\" alt width=\"1200\" height=\"934\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin-270x210.png 270w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin-347x270.png 347w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin-173x135.png 173w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Spin-796x620.png 796w\"><\/figure>\n<\/p>\n<p>If anything, KEF\u2019s data looks slightly worse than my own; it\u2019s a relief to see this kind of transparency from a mainstream manufacturer.<\/p>\n<p>On the whole, the data is very similar, except KEF\u2019s shows a slighty more tilted response, pointing to a bit of a warmer sound than the data I captured. There are greater deviations in the on-axis curve, which I probably missed because it only happens when the microphone is<em> very<\/em> precisely aligned with the center of the Uni-Q unit. But again, these deviations are virtually irrelevant, as the speaker is not meant to be listened to perfectly on-axis. The Listening Window is a better representation of what you will be hearing.<\/p>\n<p>If we take a more granular look at the speaker\u2019s horizontal response, we can see the sound changes very smoothly as you move off-axis.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332413 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal.png\" alt width=\"1200\" height=\"992\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-254x210.png 254w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-327x270.png 327w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-163x135.png 163w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-796x658.png 796w\"><\/figure>\n<\/p>\n<p>This is a good thing, and it is arguably the most important part of a good soundstage. We want the sound that reflects off of our walls to imitate the direct sound for an accurate and stable soundstage. I even think it\u2019s a bit smoother than <a href=\"https:\/\/thenextweb.com\/plugged\/2019\/06\/21\/kef-r3-review-exemplary-speakers-that-do-almost-everything-right\/\">KEF\u2019s own R3<\/a>, which costs $500 more. You can also see how the graph is smoother around 20-30 degrees off-axis than directly on-axis.<\/p>\n<p>For more of a \u2018big picture\u2019 view of the soundstage, it can be useful to make a few averages of these curves. Below we estimate the reflections off walls to the \u2018Front,\u2019 \u2018Side,\u2019 and \u2018Rear\u2019 of the speaker, as well as the Total Horizontal Reflections \u2014 an average of these three curves.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332412 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections.png\" alt width=\"1200\" height=\"934\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections-270x210.png 270w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections-347x270.png 347w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections-173x135.png 173w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Horizontal-Reflections-796x620.png 796w\"><\/figure>\n<\/p>\n<p>This is excellent performance. You can see the sidewall reflections are very close in shape to the direct sound, predicting good soundstage performance. The Horizontal ERDI curve in yellow represents how close the averaged horizontal reflections are to the listening window, and we see the smooth curve we\u2019re looking for in order to achieve good spatial presentation.<\/p>\n<p>Another way we can visualize the horizontal response is what we call a contour plot or polar map. It shows how the speaker\u2019s sound changes as you move away from the reference axis on the horizontal plane:<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332418 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm.png\" alt width=\"1194\" height=\"685\" sizes=\"(max-width: 1194px) 100vw, 1194px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm.png 1194w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm-280x161.png 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm-471x270.png 471w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm-235x135.png 235w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Polar-H-Norm-796x457.png 796w\"><\/figure>\n<\/p>\n<p>This is nearly as good as it gets.<\/p>\n<p>Turning to the vertical performance, we see one of the Meta\u2019s greatest strengths relative to its competitors. Speakers with vertically separated woofers and tweeters \u2014 which is to say, the vast majority of them \u2014 almost always show major deviations in the sound on the vertical axis. While these do not affect the soundstage too much, they can have a significant effect on tonality.<\/p>\n<p>Because the LS50 meta uses coaxial drivers, vertical performance is as good as the horizontal performance. If we look at the ceiling and floor reflections, for instance, they closely mimic the direct sound as well:<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332414 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling.png\" alt width=\"1200\" height=\"876\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling-280x204.png 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling-370x270.png 370w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling-185x135.png 185w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-Floor-Ceiling-796x581.png 796w\"><\/figure>\n<\/p>\n<p>Most speakers start to look very uneven in these measurements. These ceiling and floor reflections often introduce a dip around a speaker\u2019s crossover, where the woofer \u2018hands off\u2019 the sound to the tweeter.<\/p>\n<p>We can also see how you don\u2019t have to be too careful about placing the speakers below or above your ears:<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332416 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW.png\" alt width=\"1200\" height=\"296\" sizes=\"(max-width: 1200px) 100vw, 1200px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW.png 1200w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW-280x69.png 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW-540x133.png 540w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW-270x67.png 270w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50-Meta-vertical-LW-796x196.png 796w\"><\/figure>\n<\/p>\n<p>The sound barely changes as you move 5,10, or 15 degrees above the speaker, ensuring the speaker will still sound good while standing up as well (as the speaker is vertically symmetrical, the response is identical below the speakers, too).<\/p>\n<p>Lastly, we can see in the polar map that the LS50 Meta\u2019s vertical response closely mirrors the horizontal response.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1332419 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver.png\" alt width=\"1194\" height=\"672\" sizes=\"(max-width: 1194px) 100vw, 1194px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver.png 1194w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver-280x158.png 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver-480x270.png 480w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver-240x135.png 240w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/LS50M-Directivity-ver-796x448.png 796w\"><\/figure>\n<\/p>\n<p>One benefit of this controlled vertical directivity is that the LS50 Meta is one of the few speakers that sounds pretty much the same if oriented horizontally. That means you can lay the speaker on its side to use it as a center speaker for a home theater setup \u2014 or if it works better for your home\u2019s aesthetics.<\/p>\n<p>Each of these graphs shows remarkable technical performance, especially for a $1,500 passive speaker. If you really wanted to, you could EQ the dip around 2.5kHz for that extra ounce of neutrality, but again, I\u2019m splitting hairs. The LS50 Meta is an exceptional piece of engineering.<\/p>\n<p>Add a subwoofer or two to fill out the bass and free up the woofer, and the Metas could be endgame level speakers.<\/p>\n<h3>Living up to its reputation<\/h3>\n<p>The original LS50 are practically legendary, but I was never sure they really lived up to their hype. I have no such doubts about the LS50 Meta.<\/p>\n<p><figure class=\"post-image post-mediaBleed aligncenter\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-1331640 lazy\" src=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4.jpg\" alt width=\"1640\" height=\"924\" sizes=\"(max-width: 1640px) 100vw, 1640px\" data-lazy=\"true\" data-srcset=\"https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4.jpg 1640w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-280x158.jpg 280w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-479x270.jpg 479w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-240x135.jpg 240w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-796x448.jpg 796w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-1592x897.jpg 1592w, https:\/\/cdn0.tnwcdn.com\/wp-content\/blogs.dir\/1\/files\/2020\/12\/KEF-LS50-Meta-4-of-4-1200x675.jpg 1200w\"><\/figure>\n<\/p>\n<p>The tweaks to its sound may be subtle in the grand scheme of things, and owners of the original LS50 may not find them big enough to merit an upgrade. But at this level of performance, it is the small changes that can transform a good speaker into a truly great one.<\/p>\n<p>For $1,500, I\u2019m not sure there is another speaker in the category that can cleanly surpass the LS50 Meta; at best you will likely get \u201cdifferent,\u201d not \u201cbetter.\u201d Especially if properly integrated with a subwoofer, the LS50 Meta does pretty much everything right.<\/p>\n<p><i>Did you know we have a newsletter all about consumer tech? It\u2019s called Plugged In \u2013 <a href=\"https:\/\/mailchi.mp\/thenextweb\/newsletter\">and you can subscribe to it right here<\/a>. <\/i><\/p>\n<p class=\"c-post-pubDate\"> Published December 17, 2020 \u2014 22:36 UTC <\/p>\n<p> <a href=\"https:\/\/thenextweb.com\/plugged\/2020\/12\/17\/review-kefs-ls50-meta-upgrades-an-audiophile-fave-to-near-perfection\/\">Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It\u2019s pretty much impossible to navigate an audiophile forum without somebody mentioning KEF\u2018s LS50 speakers within a few pages. Created in 2012 to celebrate the 50th anniversary of another classic by the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1844,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/posts\/1843"}],"collection":[{"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1843"}],"version-history":[{"count":0,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/posts\/1843\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=\/wp\/v2\/media\/1844"}],"wp:attachment":[{"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.londonchiropracter.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}