They call it an acoustic, black hole, in which 99 percent of unwanted frequencies (620 Hz – 40 kHz) disappear. The bass reflex port has been reshaped and the opening has been moved to the side of the back plate, which will dampen turbulence and prevent resonances from coloring the midrange. The cabinet otherwise looks like before, but is better cushioned inside with reinforcements and two cushioning materials (CLD and DMC) that will give a ‘deader’ cabinet, but the really big news is Metamaterial Absorption Technology – MAT.Ī round plate with an intricate labyrinth pattern is mounted on the back of the element, and the pits in the pattern absorb various frequencies, so KEF claims that they can remove 99 percent of unwanted sound from the back of the element. The special Uni-Q element with the treble in the middle, under the turbine-like rosette, with the MAT disc placed behind where the air flows out behind the element. In LS50 Meta we have reached the 12th generation Uni-Q. Here, KEF’s engineers have created a new suspension based on new analyzes of various simulations, which have also led to a mythical voice coil system, and attenuation of the gap between the treble and the bass / midrange diaphragm. It should attenuate the distortion (0.7% THD at 90 dB) that can occur at higher frequencies. Now they have taken the biggest step for the coaxial speaker element in a long time, and called the new version Meta. Which plays on the fact that there is an underlying (meta) definition that lies in between here, and even if you can not see it, you can clearly hear how the element has improved since the LS50 debuted in 2011.
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