KEF CI250RRM Architectural Speakers

Product Description

Experience exceptional cinema sound with the KEF Ci250RRM THX Architectural Speaker, a premium in ceiling speaker engineered for large home theaters, private cinemas and high performance living spaces.

The Ci250RRM THX is KEF's first architectural speaker to combine a 12th Generation Uni Q driver array with Metamaterial Absorption Technology (MAT) in a three way coaxial design. It features a powerful 250 mm 10 inch low frequency driver, a 100 mm 4 inch Uni Q midrange driver and a 19 mm vented aluminium dome tweeter with MAT.

Designed for demanding home cinema applications, the speaker is THX Certified Ultra and can deliver up to 111 dB maximum SPL, making it suitable for large rooms where high output, dynamic range and accurate reproduction are essential.

KEF's Cavity Radiation Control technology addresses the midrange issues commonly associated with three way coaxial speakers. Its open backed midrange and acoustically absorptive foam design helps minimize unwanted cavity effects and maintain a more natural midrange response.

The Ci250RRM THX also incorporates Low Diffraction LF Aperture, which helps reduce resonance and diffraction around the driver assembly. Combined with MAT, these technologies help produce cleaner vocals, detailed high frequencies and a spacious, immersive soundstage.

Its ultra thin bezel and paintable magnetic grille allow the speaker to blend discreetly into the ceiling, making it an excellent choice for luxury interiors where high performance audio needs to remain visually unobtrusive.

Key Features

THX Certified Ultra

The Ci250RRM THX is engineered for demanding home theater applications and carries THX Certified Ultra certification.

12th Generation Uni Q Driver Array

The advanced Uni Q architecture integrates the midrange and tweeter into a coherent acoustic source for precise imaging and consistent sound dispersion.

Metamaterial Absorption Technology

MAT helps absorb unwanted high frequency energy behind the tweeter, producing cleaner and more natural treble.

Powerful 10 Inch Low Frequency Driver

The dedicated 250 mm / 10 inch LF driver provides substantial bass output and cinematic scale.

4 Inch Uni Q Midrange

The 100 mm / 4 inch Uni Q midrange is designed to deliver natural vocals, dialogue and detailed midrange reproduction.

Vented Aluminium Dome Tweeter

The 19 mm / 0.75 inch vented aluminium dome tweeter works with MAT to provide detailed and controlled high frequency reproduction.

Cavity Radiation Control

KEF's patent pending CRC technology helps reduce unwanted midrange cavity effects associated with coaxial three way designs.

Low Diffraction LF Aperture

The carefully profiled LF aperture helps reduce resonance and diffraction around the driver assembly.

Ultra Thin Bezel

The ultra thin bezel provides a clean architectural appearance once installed.

IP64 Rated

The speaker is rated IP64 for splash water and dust protection, making it suitable for selected demanding installation environments.

Paintable Magnetic Grille

The magnetic grille can be painted to match the surrounding ceiling for a seamless architectural finish.

Ideal Uses

Dedicated Home Theater

Perfect for premium front, surround or overhead applications in a dedicated cinema.

Dolby Atmos Home Theater

An excellent choice for high performance overhead channels in a properly designed Dolby Atmos system.

Private Cinema

Designed for customers who demand high output and immersive performance from architectural speakers.

Large Living Rooms

The powerful 10 inch driver makes the Ci250RRM THX suitable for spacious living and entertainment areas.

Luxury Media Rooms

A discreet solution for customers who want premium cinema sound without visible conventional speakers.

Custom AV Installation

Ideal for professional AV integrators, architects and interior designers.

Key Benefits

✔ THX Certified Ultra

✔ 3 Way Coaxial Architectural Design

✔ 12th Generation Uni Q Driver Array

✔ Metamaterial Absorption Technology

✔ 10 Inch Low Frequency Driver

✔ 4 Inch Uni Q Midrange

✔ Vented Aluminium Dome Tweeter

✔ Cavity Radiation Control

✔ Low Diffraction LF Aperture

✔ Up to 111 dB Maximum SPL

✔ 120 Degree Nominal Coverage

✔ Ultra Thin Bezel

✔ Paintable Magnetic Grille

✔ IP64 Certification

✔ Premium In Ceiling Installation

Technical Specifications

What's Included in the Box

• 1 x KEF Ci250RRM THX Architectural Speaker

• Paintable Magnetic Grille

• Installation Hardware

• Mounting Accessories

• User Documentation

• Warranty Documentation

Recommended Pairings

KEF Ci5160REFM THX

Use the Ci5160REFM THX for premium front channels and the Ci250RRM THX for immersive overhead channels.

Best For: Reference Level Home Cinema

KEF Ci3160REFM THX

Pair the Ci3160REFM THX with Ci250RRM THX speakers for a complete high performance architectural cinema.

Ideal For: Luxury Private Cinema

KEF Ci3120QLM THX

Use the Ci3120QLM THX for additional in wall channels while the Ci250RRM THX handles overhead duties.

Best For: Dolby Atmos Home Theater

KEF KC92

Add one or two KC92 subwoofers for even greater low frequency extension and cinematic impact.

Ideal For: Premium Home Cinema

Denon AVC A1H

A high performance AV receiver suitable for sophisticated multi channel Dolby Atmos installations.

Best For: Reference Dolby Atmos

Perfect Setup Configurations

Dolby Atmos 5.1.2

• KEF Ci3160REFM THX Front Speakers

• KEF Reference Center Speaker

• KEF Ci250RRM THX Ceiling Speakers

• KEF KC92 Subwoofer

• Denon AV Receiver

Ideal For: Premium Home Theater

Dolby Atmos 7.2.4

• KEF Ci5160REFM THX Front Speakers

• KEF Reference 4 Meta Center Speaker

• KEF Ci3160REFM THX Surround Speakers

• 4 x KEF Ci250RRM THX Ceiling Speakers

• 2 x KEF KC92 Subwoofers

• Denon AVC A1H

• 4K Laser Projector

Ideal For: Luxury Private Cinema

Reference Architectural Cinema

• KEF Ci5160REFM THX Front Speakers

• KEF Reference Center Speaker

• KEF Ci3160REFM THX Surround Speakers

• KEF Ci250RRM THX Overhead Speakers

• Dual KEF KC92 Subwoofers

• Premium AV Processor

• Dedicated Power Amplifiers

Ideal For: Reference Level Home Cinema

Why Buy the KEF Ci250RRM THX?

The KEF Ci250RRM THX is built for customers who want serious cinema performance from an architectural speaker.

Its combination of a 10 inch low frequency driver, 4 inch Uni Q midrange and MAT equipped vented aluminium tweeter provides a sophisticated three way acoustic system capable of delivering both scale and detail.

What makes it particularly impressive is KEF's approach to coaxial three way design. Cavity Radiation Control helps address midrange cavity problems, while the Low Diffraction LF Aperture is designed to reduce unwanted resonance and diffraction.

With 111 dB maximum SPL, 120 degree coverage and THX Certified Ultra performance, the Ci250RRM THX is well suited to large home theaters where conventional compact ceiling speakers may not provide enough output.

The result is a powerful architectural speaker that can deliver immersive cinema sound while remaining almost invisible once installed.

Frequently Bought Together

• KEF Ci5160REFM THX Architectural Speakers

• KEF Ci3160REFM THX Architectural Speakers

• KEF Ci3120QLM THX In Wall Speakers

• KEF Reference 4 Meta Center Speaker

• KEF KC92 Subwoofer

• Denon AVC A1H AV Receiver

• Marantz Cinema 30

• Premium Speaker Cable

• 4K Laser Projector

Create a complete high performance architectural cinema with premium front, center, surround, overhead and subwoofer components.

Frequently Asked Questions

What is the KEF Ci250RRM THX?

The KEF Ci250RRM THX is a premium three way in ceiling architectural speaker designed for high performance home theaters, private cinemas and luxury living spaces.

Is the Ci250RRM THX THX certified?

Yes. It carries THX Certified Ultra certification.

What size woofer does it have?

The speaker features a 250 mm / 10 inch low frequency driver.

Does it use Uni Q technology?

Yes. It features a 100 mm / 4 inch Uni Q midrange driver within its three way coaxial architecture.

Does it have Metamaterial Absorption Technology?

Yes. The 19 mm vented aluminium dome tweeter incorporates Metamaterial Absorption Technology.

What is Cavity Radiation Control?

Cavity Radiation Control is KEF's technology designed to address midrange problems found in conventional three way coaxial speaker designs by controlling unwanted cavity effects.

Can I use the Ci250RRM THX for Dolby Atmos?

Yes. It is an excellent option for overhead channels in a properly designed Dolby Atmos home theater.

Is it suitable for large rooms?

Yes. Its 10 inch LF driver, 111 dB maximum SPL and 120 degree coverage make it particularly suitable for larger listening spaces.

Does it require a subwoofer?

For a premium home theater, a dedicated subwoofer is still recommended. A KEF KC92 can provide additional deep bass and greater low frequency impact.

What is the speaker's impedance?

The nominal impedance is 8 Ohms.

How much amplifier power does it need?

KEF recommends 50 to 250 watts of amplifier power.

What is the cut out size?

The required ceiling cut out is approximately 300 mm / 11.81 inches in diameter.

What is the mounting depth?

The mounting depth from the ceiling surface is approximately 168 mm / 6.62 inches.

Is the Ci250RRM THX weather resistant?

It has an IP64 rating, providing protection against dust and splashing water.

Is professional installation recommended?

Yes. Due to its size, depth and installation requirements, professional installation is strongly recommended.

Is the speaker sold individually?

Yes. The product is sold as one individual speaker. Multiple speakers are required for stereo or multichannel installations.