HiFi Speakers

Kube 12 MIE

12-inch front-firing active subwoofer


Kube 12 MIE is designed to deliver rich and powerful bass, creating a heart-pounding rumble for your favourite music and movies. It features a large 12-inch driver and a 300 Watts Class D amplifier. With Music Integrity Engine®, the Kube 12 MIE is optimised to deliver outstanding level of depth and dynamics.

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Music Integrity Engine® (MIE)"

KEF‘s proprietary DSP (Digital Signal Processing) algorithms ensure that every component of the subwoofer works in perfect harmony. Features such as iBX Intelligent Bass Extension provides even deeper and precise bass at any listening level.


Feel the force

The Kube features a front-firing long throw driver with a large cone area and high excursion, delivering higher output at lower frequencies. Its efficient and cool-running 300W Class D RMS amplifier further enhances performance.


Effortless wireless integration"

The KW1 enables optimal placement of the Kube without being limited by cables. High-quality wireless transmission ensures the delivery of every nuance and impact from your favourite movies and music.


Versatile immersion

The second large model in the Kube range, perfect for movies, music, TV and gaming in larger rooms and dedicated home theatres.

What is in the box

– Kube 12 MIE subwoofer
– Power cord
– Euroblock speaker level connector
– User manual and warranty information

Listen and believe

Don’t just take our word for it. The best way to really appreciate the power of the Kube is to listen to it for yourself. Book a demo and experience the heart-pounding impact of the Kube.

Book a Demo

The Details


Powered Subwoofer (Sealed)

Drive units

1 x 300mm (12in.)

Frequency response

22Hz - 140Hz (±3dB)

Max output


Amplifier type


Amplifier power

300W RMS

Variable low pass filter

40Hz – 140Hz, LFE


RCA phono sockets
Speaker level inputs
Expansion port for KW1

Power requirements

100 - 240V, 50/60 Hz

Power consumption


Dimension (H x W x D) with rear panel and feet

410 x 393 x 410 mm
(16.1 x 15.5 x 16.1 in)



Please visit our Product Support page for more details.

KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE.

Please visit our Product Support page for more details.

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