KEF Ci200QS 8 Inch Square Uni-Q In-Ceiling Speaker

Premium KEF Sound in a Square In-Ceiling Format

The KEF Ci200QS is a passive 8" square in-ceiling speaker sold individually for whole-home audio, stereo zones, media rooms, living spaces, and other applications where a square architectural format better matches the ceiling design.

Its Uni-Q driver places the 1" tweeter at the acoustic center of the 8" woofer to help provide broad, consistent coverage across the listening area.

Key Specifications

• Sold as: One speaker
• Speaker type: Passive square in-ceiling architectural speaker
• LF driver: 200 mm (8") Uni-Q
• HF driver: 25 mm (1") tweeter
• Nominal impedance: 8 Ω
• Sensitivity: 90 dB (2.83 V / 1 m)
• Frequency response: 35 Hz–34 kHz (±6 dB, open-backed)
• Frequency range: 32 Hz–30 kHz (-10 dB)
• Crossover frequency: 2.5 kHz
• Recommended amplifier power: 10–150 W
• Recommended high-pass filter: 40 Hz
• Nominal coverage: 115°
• Maximum SPL: 107 dB
• Certification: IP64

Who Should Choose the Ci200QS?

Choose the Ci200QS when you want the performance of KEF's larger 8" architectural platform in a square format rather than a conventional round speaker. It is especially useful where speaker shape needs to align visually with square lighting, vents, or other ceiling elements.

For conventional stereo playback, use two matching speakers. Larger rooms or distributed-audio systems may require additional speakers depending on ceiling height, spacing, and listening goals.

Passive Speaker and Amplifier Requirements

The Ci200QS is completely passive. It does not include a built-in amplifier, Bluetooth, Wi-Fi, streaming, or app control.

KEF recommends 10–150 W of amplifier power and specifies an 8-ohm nominal impedance. Connect it to a compatible amplifier or AV receiver using appropriate in-wall rated speaker wire.

The 10–150 W figure is KEF's recommended amplifier range, not an RMS or peak power-handling specification.

Uni-Q With 115-Degree Coverage

The Ci200QS combines an 8" Uni-Q driver with a 1" tweeter positioned at its acoustic center.

KEF specifies approximately 115° nominal coverage, helping the speaker distribute sound across a broad listening area without relying on a narrow sweet spot.

Frequency Response and System Setup

KEF specifies an open-backed frequency response of 35 Hz–34 kHz at ±6 dB and a broader 32 Hz–30 kHz range at -10 dB. KEF recommends a 40 Hz high-pass filter.

The 8" driver provides stronger low-frequency capability than many smaller architectural models. A subwoofer can still be added when deeper or more controlled bass is needed.

Installation Dimensions

• External dimensions: 273 × 273 × 106 mm (10.75" × 10.75" × 4.17")
• Cutout: 238 × 238 mm (9.37" × 9.37")
• Mounting depth: 99.8 mm (3.93")
• Supported mounting thickness: 7–38 mm (0.28–1.50")
• Net weight: 2.4 kg (5.3 lb)

Check joists, wiring, plumbing, HVAC, insulation, and available ceiling depth before cutting the square opening.

Optional Rough-In Frame and Rear Enclosure

KEF lists the RIF200S rough-in frame and RNC200S rear enclosure as optional accessories for the Ci200QS. Both are sold separately.

KEF specifies approximately 60 liters as the ideal rear volume and 35 liters as the minimum rear volume.

IP64 Environmental Protection

The Ci200QS is IP64 certified. This provides protection against dust and splashing water but does not make the speaker waterproof or suitable for immersion.

Ultra-Thin Bezel and Paintable Magnetic Grille

KEF's Ultra-Thin Bezel keeps the visible edge narrow, while the magnetic grille can be painted to better match the surrounding ceiling finish.

What's Included?

• 1 KEF Ci200QS in-ceiling speaker
• Paintable magnetic grille
• Integrated mounting system
• Product documentation

The amplifier or AV receiver, speaker wire, RIF200S rough-in frame, RNC200S rear enclosure, and other installation materials are sold separately.

Complete Your Audio System

• In-Wall & In-Ceiling Speakers
• Amplifiers
• Speaker Wire

Need Help Planning Your Speaker Layout?

Send Bear Security Shop your room dimensions, ceiling height, amplifier model, and planned speaker quantity. We can help check coverage, amplifier compatibility, cutout requirements, and whether the Ci200QS is the right fit.

Is the KEF Ci200QS sold individually or as a pair?

Bear Security Shop currently lists the Ci200QS as a single speaker. For conventional stereo playback, order two speakers.

Is the Ci200QS powered or passive?

It is passive and requires an external amplifier or AV receiver plus speaker wire.

What amplifier power does KEF recommend?

KEF recommends 10–150 W of amplifier power. This is an amplifier recommendation, not an RMS or peak power-handling rating.

What is the impedance?

The Ci200QS has an 8-ohm nominal impedance.

What is the frequency response?

KEF specifies 35 Hz–34 kHz at ±6 dB open-backed and a 32 Hz–30 kHz range at -10 dB.

How wide is the coverage?

KEF specifies approximately 115° nominal coverage.

What high-pass filter does KEF recommend?

KEF recommends a 40 Hz high-pass filter.

What cutout size is required?

The Ci200QS requires a 238 × 238 mm, or approximately 9.37" × 9.37", square cutout.

How much mounting depth is required?

KEF specifies approximately 99.8 mm, or 3.93", of mounting depth.

Is the Ci200QS weather resistant?

Yes. It is IP64 certified. This provides protection against dust and splashing water but does not make the speaker waterproof.

Is a rough-in frame available?

Yes. KEF lists the RIF200S rough-in frame as an optional accessory. It is sold separately.

Is a rear enclosure available?

Yes. KEF lists the RNC200S rear enclosure as an optional accessory. It is sold separately.

What rear volume does KEF recommend?

KEF specifies approximately 60 liters as ideal rear volume and 35 liters as the minimum.

What should I confirm before ordering?

Confirm speaker quantity, 8-ohm amplifier compatibility, the 9.37" × 9.37" cutout, approximately 3.93" mounting depth, available rear cavity volume, and speaker-wire routing.