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SKU SP4023AA
KEF - Ci250RRM-THX - In-Ceiling Speakers
by KEF
$4,000.00
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Overview
The Ci250RRM-THX is a round, three-way coaxial in-ceiling speaker from KEF's Ci-R Series and KEF's first architectural speaker with Metamaterial Absorption Technology (MAT). It is THX Certified Ultra and is designed for large home theatres and living rooms.
A 100 mm 12th generation Uni-Q array sits in front of a 250 mm bass driver, using KEF's Cavity Radiation Control open-back midrange and a Low Diffraction LF Aperture to manage the coaxial three-way layout.
Drivers and Technology
- Three-way coaxial design: 250 mm (10 in.) LF driver with a 100 mm Uni-Q midrange and 19 mm vented aluminium dome tweeter
- Metamaterial Absorption Technology behind the tweeter, which KEF rates as absorbing 99% of unwanted rear sound
- Cavity Radiation Control (patent pending) open-back midrange with absorptive foam
- Low Diffraction LF Aperture with absorptive foam ring
- Bass extension to 20 Hz (-10 dB) and maximum SPL of 111 dB, as rated by KEF
- THX Certified Ultra
Installation
- In-ceiling mounting, 300 mm round cut-out
- Mounting depth from surface 168 mm, ceiling thickness 6 to 30 mm
- Ideal rear volume 150 L, minimum rear volume 80 L
- Ultra-Thin Bezel (UTB) with paintable magnetic grille
- IP64 splash and dust rating
Specifications
| Design | Three-way coaxial in-ceiling speaker, Ci-R Series |
| Drive Units | LF: 250 mm (10 in.) MF: 100 mm (4 in.) Uni-Q HF: 19 mm (0.75 in.) vented aluminium dome with Metamaterial Absorption Technology |
| Frequency Response (±6 dB, open-backed) | 28 Hz - 20 kHz |
| Frequency Range (-10 dB) | 20 Hz - 45 kHz |
| Crossover Frequencies | 540 Hz, 2.6 kHz |
| Sensitivity (2.83 V/1 m) | 89 dB |
| Nominal Impedance | 8 ohms |
| Nominal Coverage | 120° |
| Maximum SPL (at 1 m) | 111 dB |
| Recommended Amplifier Power | 50 - 250 W |
| Recommended High-Pass Filter | 30 - 60 Hz |
| Product Dimensions | 346 mm diameter x 175 mm depth |
| Cut-Out Dimensions | 300 mm diameter |
| Mounting Depth From Surface | 168 mm |
| Mounting Thickness | 6 mm minimum, 30 mm maximum |
| Ideal / Minimum Rear Volume | 150 L / 80 L |
| Net Weight | 6 kg |
| Dust and Water Rating | IP64 |
| Certification | THX Certified Ultra |
| Unit | Sold individually |
