Ci250RRM-THX

KEF Ci250RRM-THX In-Ceiling Speaker

Design:
The KEF Ci250RRM-THX is a premium in-ceiling speaker that delivers unparalleled audio performance, certified to THX® Ultra standards. This speaker is designed for audiophiles and home theater enthusiasts seeking superior sound quality, with KEF’s latest innovations ensuring incredible midrange realism and seamless sound reproduction. The Ci250RRM-THX features Cavity Radiation Control (CRC), KEF’s patent-pending technology that eliminates midrange frequency response dips found in typical three-way coaxial designs. Combined with KEF's signature Uni-Q driver array, the Ci250RRM-THX provides wide sound dispersion for an immersive listening experience, no matter where you are in the room.

Cavity Radiation Control (CRC):
KEF’s CRC technology addresses common midrange issues by using a unique open-back midrange driver with acoustically absorptive foam. This innovation drastically improves midrange clarity and accuracy, ensuring lifelike acoustic realism that sets the Ci250RRM-THX apart from traditional in-ceiling speakers.

Driver Configuration:

• Low Frequency: 10-inch (250mm) woofer for deep, powerful bass.
• Midrange: 4-inch (100mm) Uni-Q driver for clear and balanced mids.
• High Frequency: 0.75-inch (19mm) vented aluminum dome tweeter with Metamaterial Absorption Technology (MAT) for precise, distortion-free highs.

Frequency Response and Coverage:
The Ci250RRM-THX offers an outstanding frequency response from 28Hz - 20kHz (±6dB), with an extended range of 20Hz - 45kHz (-10dB). This wide range ensures deep lows, vibrant mids, and crisp highs, perfect for high-fidelity music and cinematic experiences. With a 120-degree nominal coverage angle, the speaker delivers even sound distribution across the room, making it ideal for large spaces or home theaters.

Sensitivity and Power Requirements:

• Sensitivity: 89dB (2.83V/1m), providing high output with minimal power.
• Impedance: 8 Ohms, compatible with a range of amplifiers.
• Recommended Amplifier Power: 50 - 250W, allowing flexibility for various audio systems.
• Recommended High-pass Filter: 30 - 60Hz, ensuring optimal performance in your setup.

Durability and Certifications:
The Ci250RRM-THX is THX® Certified Ultra, guaranteeing professional-grade sound quality in larger rooms. It’s also IP64-rated, ensuring resistance to dust and water splashes, making it a durable option for any environment.

Dimensions and Installation:

• External Diameter: 13.62 inches (346mm).
• Mounting Depth: 6.62 inches (168mm).
• Cut-out Diameter: 11.81 inches (300mm).
  With a sleek, low-profile design, the Ci250RRM-THX integrates seamlessly into any ceiling, while its easy installation process makes it a perfect choice for both new and retrofit installations. It supports ceiling thicknesses from 0.24 in. (6mm) to 1.18 in. (30mm), accommodating a wide range of surfaces.

Max SPL and Performance:
With a Max SPL of 111dB, the Ci250RRM-THX can handle high volumes without distortion, making it ideal for both immersive home theater systems and high-fidelity audio setups.