In practice, Kef has installed a MAT driver array (basically a disk made of metamaterial) behind the Meta’s Uni-Q driver to soak up unwanted resonances. They also claim 40% more frequency response smoothness over the original, a pain point for some folks on the first version. Kef claims the technology is capable of eliminating 99% of high-frequency distortion. In the case of MAT, Kef has created a synthetic material that can absorb unwanted sound emanating from the rear of the LS50 Meta’s driver, thus reducing distortion and enhancing the speaker’s transparency. By the way, metamaterials are a unique assembly of composites put together to exhibit particular properties. Then in 2020, Kef decided it was time for a refresh, implementing several improvements, most notably the introduction of Metamaterial Absorption Technology (MAT). The first LS50 speaker was released back in 2012 to celebrate KEF’s 50th anniversary, and over the years, it has become iconic, drawing accolades from just about all of the audio press.
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