📌LAB POINTS passive version of KEF's top of the line LS50 Wireless II powered speaker KEF’s signature Uni-Q drivers deliver three-dimensional sound anywhere in the room; MAT technology 99% of high-frequency distortion for pure, natural sound off-set flexible port for reduced midrange coloration + exceptional levels of depth and detail mounting inserts to secure on KEF S2 Floor Stand (sold separately) "LS50 Meta is a highly precise, emotionally engaging loudspeaker built on revolutionary acoustic technology. Designed around the Uni-Q 12th Generation with Metamaterial Absorption Technology driver array, this solid, compact loudspeaker is capable of delivering detailed sound anywhere in the room." - KEF 🔑 KEY FEATURES recommended amplifier power: 40 - 100W frequency response: 79 Hz - 28 kHz impedance: 8 ohms sensitivity: 85 dB crossover frequency: 2.1 kHz high frequency driver: 1" aluminum dome mid frequency driver: low frequency driver: 5.25" aluminum cone dimensions: 7.9" (w) x 11.9" (h) x 11" (d) / 200 x 302 x 280.5mm weight (total): 17.2 lb / 7.8 kg