Short answer: choose the CI200RR-THX for a usable surround or height channel; choose the CI50R only for a tiny, legacy background-audio location.
The CI200RR-THX is the capable ceiling speaker. Its 8-inch woofer and 1.5-inch Uni-Q tweeter, 90dB sensitivity, and THX certification give it considerably more capacity than a micro-speaker. Its 82.5Hz reported -3dB extension means it should still be crossed to a subwoofer for demanding playback.
The CI50R exists for exceptionally tight spaces. At 80mm square and 55mm deep, it can fit locations unavailable to the CI200RR-THX. Its 2-inch driver reaches only around 170Hz at -3dB, so it needs a high crossover and cannot replace a conventional surround or height speaker.
Buy the CI200RR-THX for current, THX-certified ceiling audio.
Buy the CI50R only for a compact legacy fill or ambient-audio use.
Want more options? Browse the full Passive Home rankings.
An in-ceiling speaker with an 8 inch woofer and coaxial tweeter, big enough to move real air in a family room.
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Specifications Side By Side
| KEF CI200RR-THX | KEF CI50R | |
|---|---|---|
| Price | $2,399.98 per pair | $99.99 per pair Discontinued |
| Ranked | #12 of 28 in In-Wall & In-Ceiling Speakers | #25 of 28 in In-Wall & In-Ceiling Speakers |
| Drivers | 8” woofer, 1.5” Uni-Q tweeter (2.2kHz crossover) | 2” full-range driver |
| Enclosure | Open-backed, in-ceiling | Open-backed (optional rear enclosure), in-ceiling |
| Mounting Cutout | 238mm (9.37 in) | 70mm (2.76 in) with rear enclosure |
| Dimensions | 11.4” x 11.4” x 5.2” (290 x 290 x 132.6 mm) (126.5mm mounting depth) | 3.1” x 3.1” x 2.2” (80 x 80 x 55 mm) |
| Weight | 7.9 lbs (3.6kg) | 2.2 lbs (1.0kg) |
| Sensitivity | 90dB | 82dB |
| Impedance | 4 ohms | 6 ohms |
| Power Handling | 10-190W recommended amplifier power | 10-30W recommended amplifier power |
| Frequency Response | 33Hz-28kHz +/-6dB (manufacturer, open-backed) | 125Hz-20kHz +/-6dB (manufacturer, open-backed) |
| Bass Extension (-3dB) | 82.5Hz (measured, spinorama.org vendor data) | 170Hz (measured, spinorama.org vendor data) |
| Bass Extension (-10dB) | 30.5Hz (measured, spinorama.org vendor data) | 113Hz (measured, spinorama.org vendor data) |
| Certification | THX | - |
| DIY Kit | No | No |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: KEF CI200RR-THX (measured by the manufacturer) and KEF CI50R (measured by the manufacturer), via spinorama.org.
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