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SKU SP4040AA
KEF - Ci250RRb-THX - In-Wall Subwoofers
by KEF
$2,700.00
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Overview
The Ci250RRb-THX is a round passive in-ceiling subwoofer from KEF's Ci-R Series, using an extra-long-throw 250 mm bass driver with a 150 oz magnet. It is THX Certified Ultra and THX Certified Select depending on system configuration.
It has no built-in amplifier and is designed to be driven by KEF's DSP-equipped KASA500 amplifier (sold separately). KEF rates it to 20 Hz with a maximum SPL of 109 dB.
Drivers and Technology
- 250 mm (10 in.) extra-long-throw bass driver with 150 oz magnet
- Passive design, requires the KEF KASA500 amplifier (sold separately)
- THX Certified Ultra / THX Certified Select, depending on configuration
THX System Configurations (per KEF)
- Medium room, THX Certified Select (up to 2,000 cubic feet): 1 x KASA500 with 2 x Ci250RRb-THX
- Large room, THX Certified Ultra (up to 3,000 cubic feet): 1 x KASA500 with 4 x Ci250RRb-THX
Installation
- In-ceiling mounting, 300 mm round cut-out
- Mounting depth from surface 147 mm, ceiling thickness 6 to 30 mm
- Ideal rear volume 140 L, minimum rear volume 70 L
- Ultra-Thin Bezel (UTB) with paintable magnetic grille
- IP64 dust and water rating
Specifications
| Design | Passive in-ceiling subwoofer, Ci-R Series |
| Drive Units | LF: 250 mm (10 in.) |
| Required Amplifier | KEF KASA500 (sold separately) |
| Frequency Response (±6 dB, open-backed) | 20 Hz - KASA500 setting |
| Frequency Range (-10 dB) | 16 Hz - KASA500 setting |
| Maximum SPL (at 1 m) | 109 dB |
| Recommended Low-Pass Filter | 50 Hz - 120 Hz |
| Product Dimensions | 346 mm diameter x 153 mm depth |
| Cut-Out Dimensions | 300 mm diameter |
| Mounting Depth From Surface | 147 mm |
| Mounting Thickness | 6 mm minimum, 30 mm maximum |
| Ideal / Minimum Rear Volume | 140 L / 70 L |
| Net Weight | 5.6 kg |
| Dust and Water Rating | IP64 |
| Certification | THX Certified Ultra, THX Certified Select |
| Unit | Sold individually |
