Powerful Low-End Extension, Total Synchronicity, and Limitless Flexibility: KEF KUBE 12b Features a Custom-Integrated 12-Inch Driver, 300-Watt Amplifier, and 56-Bit DSP Preamplifier
Intelligent Bass Extension: It's not only an apt description of the KEF KUBE 12b subwoofer's strengths, but the name of the algorithm the in-house engineering team developed to make this elegant box a standout component. The technology, also known as IBX, effectively creates an extended depth that unleashes the full potential of the custom-integrated 12-inch driver inside KUBE 12b, resulting in remarkable precision and synchronicity between the 300-watt amplifier, driver, and sealed cabinet. Equipped with a 56-bit MIPS DSP preamplifier, KUBE 12b offers an array of LFE, line-level, and speaker-level inputs for set-up flexibility. Phase selection and three DSP-controlled EQ settings allow KUBE 12b to jive with your room's dimensions and existing speakers. Most importantly, KUBE 12b adds dimensions, details, and dynamics to your music you probably never imagined you could hear with the addition of a sub-$1k subwoofer. But when that model at hand is KUBE 12b – a beneficiary of in-house-assembled driver, cabinet, and circuitry – such axioms instantly change. 100% Music Direct Guaranteed.
"Powered by a 300-watt Class D amp and custom circuitry, the 12b punches above its class and capabilities, producing deep, buttery bass perfect for those who love to FEEL music and movies."
– High-Def Digest
Take Total Control
Your room, your rules. With a range of LFE, line- and speaker-level inputs, Phase selection, and three DSP-controlled EQ settings to help match your sub to any room placement, you're in control right out of the box. Set up KUBE 12b where it's most convenient to you, match it to any main speaker, or with any type of music system and start exploring new depths in your sound.
No Shortcuts: Designed, Engineered, and Assembled In-House
KEF is quite possibly the only high-end manufacturer of subwoofers that designs, engineers, and assembles the driver, cabinet, and circuitry in-house. This level of integration is the hallmark of KEF's commitment to pure sound. What you get is a driver and amplifier so attuned they sing in absolute harmony.
- 56-bit 50 MIPS DSP preamplifier
- iBX Intelligent Bass Extension
- KEF smartConnect intelligent inputs automatically detect mono or stereo and adjust the subwoofer volume level accordingly
- Sealed for greater accuracy and delicate musical detail while allowing the subwoofer to be installed in a cabinet if desired
- Placement tuning presets for: free-standing, wall/in-cabinet, and corner
- 300-watt Class D amplifier with DSP preamplifier/EQ
Design: Powered Subwoofer (sealed)
Drive Units: 1 x 300mm (12in.)
Frequency Response: 22Hz-140Hz (±3dB)
Maximum Output: 114dB
Inputs: RCA Phono sockets. Speaker level inputs
Amplifier type: Built-in Class-D
Recommended Amplifier Power: 300W RMS
Variable low pass filter: 40Hz-140Hz & LFE
Analogue Input: RCA phono sockets Speaker level inputs
Power requirements: 100V-120V/220V-240V ~ 50/60Hz
Dimensions (HWD): 16.1" x 15.5" x 16.1"
Weight: 45.4 lbs.
User Manual (PDF, 7.0 MB)