KEF Referance 4c Meta Merkez Hoparlör

Design

Three-way bass reflex

Drive units

Uni-Q driver array: 

HF: 25 mm (1 in.) aluminium dome with MAT 

MF: 125 mm (5 in.) aluminium cone

LF: 4 x 165 mm (6.5 in.) aluminium cone

Frequency range free field (-6dB) Short port: 43Hz - 45kHz Long port: 40Hz - 45kHz

Frequency range typical in room

bass response (-6dB)  33Hz

Frequency response (±3dB)  48Hz – 35kHz

Crossover frequency  450Hz, 2.1kHz

Amplifier requirements  50-400W

Sensitivity (2.83V/1m)  88dB

Harmonic distortion 2nd & 3rd harmonics (90dB, 1m)

<0.5% 40Hz – 100kHz

<0.2% 200Hz – 2kHz

<0.1% 2kHz - 20kHz

Maximum output (peak sound pressure level at 1m with pink noise) 116dB

Impedance 4 Ω (min. 3.2 Ω)

Weight 45.2 kg (99.6 lbs.)

Dimensions (H x W x D)(with grille and terminal)

205 x 1090 x 463 mm(8.1 x 42.9 x 18.2 in.)