Reference 4 Meta
Reference 4 Meta
KEF Reference 4 Meta
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Drive Units:
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Uni-Q Driver Array:
HF: 25 mm (1 in.) aluminium dome with MAT (Metamaterial Absorption Technology)
MF: 125 mm (5 in.) aluminium cone -
Bass Units:
LF: 4 x 165 mm (6.5 in.) aluminium cone
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Uni-Q Driver Array:
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Frequency Range (Free Field) (-6dB):
- Short port: 43 Hz - 45 kHz
- Long port: 40 Hz - 45 kHz
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Frequency Range (Typical In-Room Bass Response) (-6dB):
33 Hz for deep and impactful low-end performance. -
Frequency Response (±3dB):
48 Hz - 35 kHz for balanced and wide-ranging sound. -
Crossover Frequency:
450 Hz, 2.1 kHz for seamless driver integration. -
Amplifier Requirements:
Suitable for amplifiers rated between 50 - 200 W. -
Sensitivity (2.83V/1m):
88 dB for efficient sound reproduction. -
Harmonic Distortion (2nd & 3rd Harmonics) (90dB, 1m):
- <0.5% between 40 Hz – 100 kHz
- <0.2% between 200 Hz – 2 kHz
- <0.1% between 2 kHz - 20 kHz
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Maximum Output (Peak Sound Pressure Level at 1m with Pink Noise):
116 dB, delivering powerful sound performance. -
Impedance:
4 Ω (minimum 3.2 Ω), ensuring compatibility with high-performance amplifiers. -
Weight:
45.2 kg (99.6 lbs), offering a solid and robust build. -
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.)