| Brand | KEF | KEF |
| Model No | R11 Meta | Refrence 8B Subwoofer |
| Wired / Wireless | Home Theatre Speaker Specification | Home Theatre Speaker Specification |
| Driver Type | Dynamic | Dynamic |
| |
| Driver Diameter | Uni-Q Driver Array
MF: 125 mm Aluminum Cone
HF: 25 mm Vented Aluminum Dome With MAT
Bass Unit: LF : 4 X 165 mm Hybrid Aluminum Cone | 2 X 225 mm |
| Impedance | 4 Ohms ( Min. 3.2 Ohms ) | NA |
| Sensitivity | 90 dB | NA |
| Frequency Response | Crossover Frequency : 330 Hz, 2.5 KHz
Frequency Range ( -6dB ) : 30 Hz - 50 KHz
Frequency Response ( ±3dB ) : 46 Hz - 28 KHz
Typical In-Room Bass Response ( -6dB ) : 26 Hz
Harmonic Distortion ( 90dB, 1m ) : <1% 33 Hz & Above, <0.5% 80 Hz - 20 KHz | Variable Frequency 40Hz - 160Hz
Frequency Range Free Field ( -6dB ): 18Hz
Frequency Response : ( ±3dB )24Hz At 90dB Output In Free-Space Mode |
| Maximum Power Input | NA | AC 100V - 120V / 220V - 240V ~50/60Hz |
| Maximum Power Output | 15 - 300 W ( RMS )
Three-Way Bass Reflex | 2 X 500 W ( RMS ) Class D
Internal Volume 23L |
| Signal to Noise Ratio | 113 dB | 110dB |
| |
| Noise Cancelling | | |
| Aux Connectivity | No | No |
| Weight | 36.5 Kg | 34 Kg |
| Dimensions | Speaker : 1249 mm X 200 mm X 384 mm
Terminal With Plinth : 1296 mm X 311 mm X 384 mm | Speaker : 398 mm X 365 mm X 429 mm |
| Available Colors | Black, White, Brown | Black |
| Accessories | KEF R11 Meta Home Theatre Speaker
Port Bungs
Microfiber Grille
Plinth & Spike Accessories
User Manual & Warranty Information | KEF Reference 8B Subwoofer
Power Cable
Product Manual |
| Other Features | The R11 Meta is the largest floorstanding model of the R Series.
Meta Material Absortion technology absorbs 99% of unwanted sound for the most pure and natural sound.
For a breathtaking listening experience, the R11's combination of 12th generation Uni-Q driver array with MAT and four 6.5†hybrid aluminum bass drivers allow it to pick out the subtle details of a recording, while also delivering raw power and agility. | LF Drive Unit : Equipped with 2 x 225 mm (9in.) low-frequency drive units, the subwoofer delivers powerful and impactful bass.
Maximum Output : Capable of reaching a maximum output of 110dB at 1m and 50Hz, providing a dynamic and immersive bass experience.
Low Pass Filter : Features a variable low pass filter with a frequency range from 40Hz to 160Hz, allowing users to customize the crossover point.
Frequency Response : The frequency response at 90dB output in free-space mode is ±3dB from 24Hz, ensuring accurate and balanced bass reproduction.
Amplifier : Powered by 2 x 500W Class D amplifiers with a switched mode power supply and DSP-based control section, delivering efficient and controlled power.
Inputs & Connectivity: Provides versatile connectivity options with analog XLR socket, speaker level inputs, and a link out via RCA phono socket. The subwoofer’s net internal volume is 23L. |
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