KEF Reference 4C Meta Centre Speakers
The KEF Reference 4C Meta Centre Speakers offer an immersive audio experience with their advanced three-way bass reflex design. Equipped with a sophisticated Uni-Q driver array, including a 25mm vented aluminum dome High-Frequency (HF) driver, a 125mm aluminum Mid-Frequency (MF) driver, and four 165mm aluminum cone Low-Frequency (LF) drivers, these speakers are built for dynamic and rich sound reproduction. With a wide frequency range from 33Hz to 45kHz and precise crossover frequencies at 350Hz and 2.8kHz, they provide clarity and seamless integration for exceptional audio performance. Their versatile design supports power in the range of 50-400W, ensuring compatibility with various audio setups while maintaining low harmonic distortion for faithful sound delivery.
Key Features
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Three-Way Bass Reflex Design: Advanced speaker system with a Uni-Q driver array for superior sound reproduction.
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Wide Frequency Range: 33Hz to 45kHz (free field) for detailed bass and high-frequency performance.
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Seamless Driver Integration: Crossover frequencies at 350Hz and 2.8kHz ensure smooth transition between drivers.
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High Sensitivity and Output: 90dB sensitivity and a peak output of 116dB for clear and dynamic audio playback.
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Amplifier-Friendly Design: Handles 50-400W power for versatile use with different audio equipment.
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Low Harmonic Distortion: <0.5% distortion at 40Hz-100kHz and <0.2% at 200Hz-10kHz for accurate sound reproduction.
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Stable Impedance: 8 Ohms nominal impedance (minimum 3.2 Ohms), ensuring compatibility with a wide range of amplifiers.
Technical Specifications
| Design |
Three-way bass reflex |
| High-Frequency (HF) Driver |
25 mm (1 in.) aluminium dome with MAT |
| Mid-Frequency (MF) Driver |
125 mm (5 in.) aluminium cone |
| Bass Units (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 SPL at 1m with Pink Noise) |
116dB |
| Impedance |
4 Ohms (minimum 3.2 Ohms) |
