Welcome to myKEF
Sign in

Make the most of your KEF experience.

Quality KEF experiences. Extra benefits.

Create Account

Architectural Speakers

Ci250RRM-THX

Frequently bought together

    =

      KEF’s First Architectural Speaker with MAT™ 

      Featuring innovative technologies including 12th Generation Uni-Q® driver array with Metamaterial Absorption Technology (MAT), patent-pending Cavity Radiation Control and Low Diffraction LF Aperture, Ci250RRM-THX is a truly revolutionary coaxial three-way architectural speaker that delivers immersive, high-fidelity soundstage with unmatched sonic excellence for large home theatres and living rooms.

      Pushing technological boundaries

      KEF always pushes the technological boundaries in its mission to create the best possible sound; Ci250RRM-THX is the physical manifestation of that drive.


      Cavity Radiation Control (CRC)

      The latest patent-pending technology developed by the KEF Engineering team in the UK; Cavity Radiation Control (CRC) is a unique open-back midrange with acoustically absorptive foam design that eliminates midrange issues including frequency response dips of up to 30dB in magnitude, found in typical coaxially arranged three-way designs. With CRC, Ci250RRM-THX delivers the highest midrange acoustic realism among three-way coaxial loudspeakers to date.


      Low Diffraction LF Aperture 

      Ci250RRM-THX features Low Diffraction LF Aperture, a carefully profiled, smoothed housing design with an outer acoustically absorptive foam ring that reduces resonance and diffraction. As a result, it delivers exceptional MF/HF performance while preserving a tremendous bass output.


      Uni-Q®Sit anywhere, hear every detail

      Uni-Q technology is the building block of KEF signature sound. Designed to perform at its best in Ci250RRM-THX, the remarkable 12th generation Uni-Q driver array acts as a single point source, dispersing sound more evenly allowing everyone sitting at different spots in the room to experience the same natural detailed sound.


      EXPLORE MORE

      MAT™Absorb 99% of the unwanted sound

      The Ci250RRM-THX is the first architectural speaker that benefits from our acoustic innovation: Metamaterial Absorption Technology (MAT™).  MAT is a highly complex maze-like structure that absorbs 99% of the unwanted sound from the rear of the tweeter, delivering a more crisp, natural treble performance.


      EXPLORE MORE
      Select a property
      The latest patent-pending technology developed by the KEF Engineering team in the UK; Cavity Radiation Control (CRC) is a unique open-backed midrange with acoustically absorptive foam design that eliminates midrange distortion, up to 30dB midrange dip, found in typical coaxially arranged three-way designs. With CRC, Ci250RRM-THX delivers the highest midrange acoustic realism among three-way coaxial loudspeakers to date.
      Select a property

      Low Diffraction LF Aperture

      Ci250RRM-THX features Low Diffraction LF Aperture, a carefully profiled, smoothed housing design with an outer acoustically absorptive foam ring that reduces resonance and diffraction. As a result, it delivers exceptional MF/HF performance while preserving a tremendous bass output.

      Powerful, high-fidelity sound

      As part of the Extreme Home Theatre line-up within KEF Architectural Speakers, Ci250RRM-THX is engineered to deliver powerful, room-filling, high-fidelity sound for the most discerning music and movie lovers.

      Featuring a 250mm (10 in.) LF driver, Ci250RRM-THX delivers deep, room-filling bass down to 28Hz. Together with the 100mm (4 in.) Uni-Q driver array with MAT, Ci250RRM-THX delivers powerful, high-fidelity sound with maximum SPL of 111dB.
      THX certified logo.png
      Ci250RRM-THX delivers ultra-high performance with true theatre sound quality for large theatres and living rooms and it is certified to THX® Ultra. A deep understanding of the filmmaking process and surround sound is at the very heart of every THX® certified speaker system. Engineered with design characteristics of professional studio speakers, THX® recreates the tonal balance of the filmmaker's final mix in your home theatre or living room. The results? Action sequences are impactful, and dialogue-driven moments are natural and engaging.

      Designed to perform

      Engineered to be structurally robust with a premium aesthetic, the bespoke Ultra-Thin Bezel (UTB) offers the slimmest visible rim around the speaker while casting virtually no shadow. The paintable UTB and magnetic grille ensures the speaker seamlessly blends into the environment.

      Ci250RRM-THX is splash water and dust proof with IP64 certification. With a well-considered mechanical design, Ci250RRM-THX ensures ease of installation with minimum of fuss.
      Grille Off
      Grille On
      The Details

      SPECIFICATIONS

      accordion open
      Nominal Impedance
      8 Ohms
      Sensitivity (2.83V/1m)
      89dB
      Frequency Response (±6dB) Open-backed
      28Hz - 20kHz
      Frequency Range (-10dB)
      20Hz - 45kHz
      Nominal Coverage (Degrees)
      120
      Max SPL
      111dB
      Crossover Frequencies
      540Hz, 2.6kHz
      Drive Units
      LF: 250mm (10in.)
      MF: 100mm (4in.) Uni-Q
      HF: 19mm (0.75in.) vented aluminium dome with Metamaterial Absorption Technology1
      Recommended Amplifier Power
      50 - 250W
      Recommended High-pass Filter (Hz)
      30 - 60Hz
      Product External Dimension
      Diameter Ø: 346mm (13.62in.)
      Depth: 175mm (6.89in.)
      Cut-out Dimensions
      Diameter Ø: 300mm (11.81in.)
      Net Weight
      6kg (13.2lbs)
      Mounting Depth from Surface
      168mm (6.62in.)
      Optional Rough In Frame
      -
      Ideal Rear Volume
      150L
      Minimum Rear Volume
      80L
      Certification
      THX® Certified Ultra
      Safety and Regulatory Compliance
      IP64
      Ceiling thickness (Maximum)
      30mm (1.18in.)
      Ceiling thickness (Minimum)
      6mm  (0.24in.)
      Remarks
      KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. THX, the THX logo, and Ultra are trademarks of THX Ltd. THX and the THX logo are registered in the U.S. and other jurisdictions. All rights reserved.

      INSTALLATION VIDEOS

      accordion open
      In-ceiling installation 

      Metamaterial Absorption Technology is a joint development with Acoustic Metamaterials Group. 

      KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.
      Please visit our Ci Software Download page for more details.

      Cart (0 item)