As we previously wrote, the UK company KEF announced the development of LS50 series bookshelf speakers using the advanced MAT solution – Absorbent Material Technology. It took three years of research to develop the improved KEF LS50 Meta. Acoustics will soon appear on sale in the Russian Federation.
The Absorbent Metamaterials (MAT) technology was developed by KEF engineers in collaboration with Hong Kong-based Acoustic Metamaterials Group. The use of an artificially created material (metamaterial) makes it possible to absorb almost all sound energy from the back of the speaker, taking up a minimum of space in the speaker cabinet.
MAT uses a special labyrinthine structure, each of the segments of which absorbs sound in a certain frequency band and behaves like an “acoustic black hole”, taking in total 99% of unwanted sound energy (while traditional absorbers, such as synthetic winterizer, accumulate only 60 %).
KEF LS50 Meta is a passive two-way monitor equipped with a twelfth generation Uni-Q coaxial driver and a MAT (Metamaterial Absorption Technology) disc located behind the speaker and absorbing return radiation. Other features of the model include a flexible bass reflex port, a curved front panel, and the use of internal braces and damping material. The LS50 Meta will be available in four finishes: Titanium Gray, Carbon Black, Mineral White and Royal Blue Special Edition.
Specifications KEF LS50 Meta:
Driver Uni-Q woofer / midrange driver – 130 mm (5.25 “) with a magnesium-aluminum alloy cone;
Tweeter – 25mm (1 “) aluminum alloy dome with Absorbent Metamaterial Technology (MAT);
Frequency range (-6 dB) 47 Hz – 45 kHz;
Frequency response (± 3 dB) – 79 Hz – 28 kHz;
Sensitivity (2.83 V, 1 m) – 85 dB SPL;
Max. sound pressure at a distance of 1 m – 106 dB;
Harmonic distortion <0.4% @ 175 Hz – 20 kHz (90 dB SPL, 1 m);
Crossover frequency 2.1 kHz;
Nominal resistance 8 Ohm;
Minimum resistance 3.5 ohms;
Dimensions 302 x 200 x 278 mm;
Weight 7.2 kg.