KEF Blade One Meta Design: Three-way bass reflex, Single apparent source Uni-Q driver Array: HF: 25 mm (1 in.) aluminium dome with MAT MF: 125 mm (5 in.) aluminium cone Bass units: LF: 4 x 225 mm (9 in.) aluminium cone, force cancelling Frequency range free field (-6dB): 27 Hz – 45 kHz Frequency range typical in room bass response (-6dB): 20 Hz Frequency response (±3dB): 35 Hz – 35 kHz Crossover frequencies: 350 Hz, 2 kHz Amplifier requirements: 50 – 400W Sensitivity (2.83V/1m): 88 dB Harmonic distortion 2nd and 3rd harmonics (90dB, 1m): <0.5% 40 Hz – 100k Hz <0.2% 200 Hz – 2k Hz <0.1% 2k Hz – 20k Hz Maximum output (SPL): 117dB (peak sound pressure level at 1m with pink noise) Impedance: 4 Ω (min. 2.8 Ω) Weight: 57,2 kg Dimensions – with plinth (H x W x D): 1590 x 363 x 540 mm
