
The tweeter radiates as much backwards as forwards. Behind it, a metamaterial disc pierced with channels of differing lengths traps that rear wave and dissipates it as heat: 99% of the high-frequency energy never returns to the cone. What is left is the signal.
Four 165 mm cones for the bass alone: the R11 Meta sits at the top of the R Series. The curve reaches down to 30 Hz at −6 dB, three hertz below the R7, and maximum output reaches 113 dB. The crossovers fall at 480 Hz and 2.7 kHz.
90 dB of sensitivity, the highest figure in the R Series. A 15 W amplifier makes it sing, even though it accepts 200. That efficiency changes what can be placed in front of it: a modest integrated amplifier holds the R11 without straining.
1249 mm tall for 36.5 kg: the R11 Meta takes two people to move and calls for a room where 113 dB mean something. Impedance falls to 3.2 Ω at minimum, so it needs an amplifier that holds the load. Three finishes: gloss black, gloss white, walnut.
Data sheet
Specific References
Pair of KEF B1 wall brackets for LSX II speakers. Direct wall mounting with no furniture or stand, in Black or Silver.
This website uses cookies to ensure you get the best experience on our website