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KEF Ci 250 RRb-THX In-Wall Subwoofer

€1,250.00

per Piece incl. VAT / incl. Shipping

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Available in 7 days, delivery time 1-3 days
 
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2026-05-04T15:15:46+00:00

Available in 7 days, delivery time 1-3 days

Germany
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Product number: 296915
Product­information
Product information Ci 250 RRb-THX In-Wall Subwoofer
Productnumber

296915

The extreme architectural subwoofer

The Ci250RRb-THX was engineered to deliver incredibly accurate and powerful bass. It is the perfect complement to any music or home theater system and an excellent partner to other KEF speakers. Featuring an extra-long throw 250mm woofer with a massive 150oz magnet, the Ci250RRb-THX delivers exceptional depth with the precision required for an epic music, movie or gaming experience.

Feel the details in depth

In order to create the most intensive music and film experience possible, the enormous performance is combined with fine detail reproduction. The Ci250RRb-THX's extra-long throw 250mm woofer delivers both in abundance when driven by KEF's DSP-equipped KASA500 amplifier.

Part of KEF Architectural Speakers' Extreme Home Theater range, the Ci250RRb-THX has been designed to provide a high-fidelity sound experience for the most discerning music and film lovers. Equipped with a massive 150oz magnet in the motor system, Ci250RRb-THX delivers thunderous, low-distortion bass down to 20Hz with a maximum SPL of 109dB.

Delivering extremely high performance with true theatrical sound quality for large theaters and living rooms, the Ci250RRb-THX is THX® Ultra certified when driving four Ci250RRb-THX from a KEF KASA500 amplifier. When the KEF KASA500 amplifier drives two Ci250RRb-THX, the performance meets the THX® Select standard.

Every THX® Certified speaker system features a deep understanding of filmmaking and surround sound. THX® speakers were engineered with the design cues of professional studio speakers to reproduce the tonal balance of the filmmaker's final mix in your living room. The result? Action sequences are impressive, and dialogue-driven moments feel natural and captivating.

THX®-Certified subwoofers deliver the appropriate frequency response, high power and imaging quality of a conventional box loudspeaker. So you get the best of both worlds - THX® surround sound performance from components that blend seamlessly into any interior.

Engineered for performance

The custom Ultra-Thin Bezel (UTB) provides the narrowest visible bezel around the speaker and casts virtually no shadow. The paintable UTB and magnetic grille ensure the speaker blends seamlessly into the environment.

The Ci250RRb-THX is splash and dust resistant and certified to IP64. The thoughtful mechanical design of the Ci250RRb-THX ensures easy installation with a minimum of fuss.

Frequency response (±6dB) Open back panel: 20Hz - KASA setting
Frequency range (-10dB): 16Hz - KASA setting
Max SPL: 109dB

drive units
LF: 250mm (10in.)

Required amplifier
KEF KASA500

Recommended Low Pass Filter (Hz)
50Hz - 120Hz

Product External Dimensions
Diameter Ø: 346mm (13.62in.)
Depth: 153mm (6in.)

Dimensions of the cutout
Diameter Ø: 300mm (11.81in.)

net weight
5.6 kg (12.3 lbs)

Mounting depth from surface
147mm (5.8in.)

Ideal volume at the back
140L

Minimum rear volume
70L

THX certification
THX® Certified Ultra



Condition: new item
Product type: Built-in speakers, subwoofer
Product number 296915

The extreme architectural subwoofer

The Ci250RRb-THX was engineered to deliver incredibly accurate and powerful bass. It is the perfect complement to any music or home theater system and an excellent partner to other KEF speakers. Featuring an extra-long throw 250mm woofer with a massive 150oz magnet, the Ci250RRb-THX delivers exceptional depth with the precision required for an epic music, movie or gaming experience.

Feel the details in depth

In order to create the most intensive music and film experience possible, the enormous performance is combined with fine detail reproduction. The Ci250RRb-THX's extra-long throw 250mm woofer delivers both in abundance when driven by KEF's DSP-equipped KASA500 amplifier.

Part of KEF Architectural Speakers' Extreme Home Theater range, the Ci250RRb-THX has been designed to provide a high-fidelity sound experience for the most discerning music and film lovers. Equipped with a massive 150oz magnet in the motor system, Ci250RRb-THX delivers thunderous, low-distortion bass down to 20Hz with a maximum SPL of 109dB.

Delivering extremely high performance with true theatrical sound quality for large theaters and living rooms, the Ci250RRb-THX is THX® Ultra certified when driving four Ci250RRb-THX from a KEF KASA500 amplifier. When the KEF KASA500 amplifier drives two Ci250RRb-THX, the performance meets the THX® Select standard.

Every THX® Certified speaker system features a deep understanding of filmmaking and surround sound. THX® speakers were engineered with the design cues of professional studio speakers to reproduce the tonal balance of the filmmaker's final mix in your living room. The result? Action sequences are impressive, and dialogue-driven moments feel natural and captivating.

THX®-Certified subwoofers deliver the appropriate frequency response, high power and imaging quality of a conventional box loudspeaker. So you get the best of both worlds - THX® surround sound performance from components that blend seamlessly into any interior.

Engineered for performance

The custom Ultra-Thin Bezel (UTB) provides the narrowest visible bezel around the speaker and casts virtually no shadow. The paintable UTB and magnetic grille ensure the speaker blends seamlessly into the environment.

The Ci250RRb-THX is splash and dust resistant and certified to IP64. The thoughtful mechanical design of the Ci250RRb-THX ensures easy installation with a minimum of fuss.

Frequency response (±6dB) Open back panel: 20Hz - KASA setting
Frequency range (-10dB): 16Hz - KASA setting
Max SPL: 109dB

drive units
LF: 250mm (10in.)

Required amplifier
KEF KASA500

Recommended Low Pass Filter (Hz)
50Hz - 120Hz

Product External Dimensions
Diameter Ø: 346mm (13.62in.)
Depth: 153mm (6in.)

Dimensions of the cutout
Diameter Ø: 300mm (11.81in.)

net weight
5.6 kg (12.3 lbs)

Mounting depth from surface
147mm (5.8in.)

Ideal volume at the back
140L

Minimum rear volume
70L

THX certification
THX® Certified Ultra

Condition: new item
Product type: Built-in speakers, subwoofer

Manufacturer

GP Acoustics GmbH
Nordhofstraße 2
45127 Essen
Germany
info.de@kef.com

Safety Information

Product-specific safety instructions can be found in the operating manual.

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