KEF Ci 160 RR-THX, Ceiling Speaker, 4 Ohm
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Product view — rear view
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The exact KEF source specifies a 4 Ω model with a 196 mm circular cut-out. Its Universal Cut-out system shares the opening used by 160 mm KEF speakers.
Typical applications
- In-ceiling or in-wall architectural audio installation
- Theatre installation where the specified rear-volume and THX setup guidance are followed
Full specifications
| Nominal impedance | 4 Ω |
|---|---|
| Sensitivity (2.83V/1m) | 90 dB |
| Frequency response, open-backed (±6 dB) | 52 Hz – 24 kHz |
| Frequency range (-10 dB) | 38 Hz – 30 kHz |
| Maximum SPL | 105 dB |
| Crossover frequency | 2.1 kHz |
| Drive units | LF: 165 mm (6.5 in.) Uni-Q; HF: 25 mm (1 in.) |
| Recommended amplifier power | 10 – 190 W |
| Product diameter / depth | 234.6 mm / 115 mm |
| Cut-out diameter | 196 mm |
| Mounting depth from surface | 110 mm |
| Mounting thickness | 5 – 37 mm |
| Optional rough-in frame | RIF160R |
| Ideal / minimum rear volume | 20 L / 10 L |
| THX certification | THX Ultra |
| Ingress protection rating | IP64 |
Installation and cabinet guidance
Use the manufacturer cut-out diameter of 196 mm and mounting depth of 110 mm; confirm the panel thickness is within the manufacturer limits before cutting.
For the THX Ultra distortion specification, KEF directs installation with a 3 litre rear enclosure and the A/V processor speaker size set to small.
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