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Brand KEF
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KEF Kube8b 8" Front Firing Active Subwoofer

Brand KEF
(0 Reviews)

KEF Kube8b 8" Front Firing Active Subwoofer

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Brand KEF
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In Stock - Available for Delivery Only

KEF Kube8b 8" Front Firing Active Subwoofer


About This Product


KEF Kube8b 8" Front Firing Active Subwoofer

Don't let its compact size fool you, the Kube 8b may not take up much space but the bass it delivers is anything but small.

With an 8 inch driver the Kube8b is perfect for smaller living rooms. It shares the 300 Watts Class D amp as the larger Kubes, as well as iBX technology to extend the bass depth dynamically.

Hear new dimensions in sound with Kube subwoofers

The Kube 8b effortlessly unleashes explosive power. iBX technology extends the bass depth dynamically and KEF’s unique ability to design, build and integrate the driver in-house takes optimisation to a whole new level. Delivering immersive music and home theatre sound that takes you to the heart of the performance.


Go deep or go home. KEF’s design and engineering team worked in chorus to develop iBX. This Intelligent Bass Extension algorithm creates an extended depth that unlocks the full potential of the custom driver. Giving you unparalleled precision and ultimate synchronicity between amplifier, driver and sealed cabinet.

Easy Configuration

Kube subwoofers offer unmatched set up flexibility. A range of LFE, line and speaker-level inputs, phase selection and DSP controlled EQ settings help you get the best from a Kube. Put it in a convenient place, match it to any main speaker or type of music system and start exploring new depths in the sound.


KEF is quite possibly the only high-end manufacturer that designs, engineers and assembles the driver, cabinet and circuitry in-house. This level of integration means we are commited to pure sound and the Kube stays true to that ideal. The result is a driver and amplifier that are perfectly in tune.


Weight: 11.3kg
Dimensions (with Rear panel and feet / H x W x D): 293 x 293 x 310mm (11.5 x 11.5 x 12.2in.)
Design: Powered Subwoofer (sealed)
Power Requirements: 100V - 120V / 220V - 240V ~ 50 / 60Hz
Unit Measurement: Piece
Variable Low Pass Filter: 40Hz - 140Hz & LFE
Frequency Response: 34 to 140Hz (-6dB)
Maximum Output: 105dB
Recommended Amplifier Power: 300 Watts RMS
Amplifier Type: Built-in Class-D
Drive Units: 1 x 200mm (8in.)
Inputs: RCA phono sockets Speaker level inputs
Analogue Input: RCA phono sockets Speaker level inputs

  • 10" 300 Watt front firing subwoofer
  • DSP for room placement correction
  • KEF iBX tech dynamically extends bass depth



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