SKU: 29324920234

KEF Kube12b Subwoofer

Sale price$742.50 Regular price$825.00
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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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Description

KEF Kube12b Subwoofer12 inches bass driver active subwoofer The Kube12b is engineered to deliver the deepest bass for music and movies, if you want to feel the earth move look no further. Perfect for creating a deep and clean rumble in large rooms. The Kube 12b has a 300 Watts Class D amplifier and a large 12 inches driver as well as iBX technology to dynamically extend bass depth. Hear new dimensions in sound with Kube subwoofers The Kube 12b effortlessly unleashes

12 inches bass driver active subwoofer

The Kube12b is engineered to deliver the deepest bass for music and movies, if you want to feel the earth move look no further. Perfect for creating a deep and clean rumble in large rooms. The Kube 12b has a 300 Watts Class D amplifier and a large 12 inches driver as well as iBX technology to dynamically extend bass depth.

Hear new dimensions in sound with Kube subwoofers

The Kube 12b effortlessly unleashes explosive power. iBX technology dynamically extends bass depth 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.

Immersiveness

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.

Integration

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 committed to pure sound and the Kube stays true to that ideal. The result is a driver and amplifier that are perfectly in tune.

Specifications


Weight  20.6kg
Dimensions (with Rear panel and feet / H x W x D)  410 x 393 x 410mm (16.1 x 15.5 x 16.1in.)
Design  Powered Subwoofer (sealed)
Power Requirements  100V - 120V / 220V - 240V ~ 50 / 60Hz
Variable Low Pass Filter  40Hz - 140Hz & LFE
Frequency Response  22Hz - 140Hz (±3dB)
Maximum Output  114dB
Recommended Amplifier Power  300W RMS
Amplifier Type  Built-in Class-D
Drive Units  1 x 300mm (12in.)
Inputs  RCA phono sockets Speaker level inputs
Analogue Input  RCA phono sockets Speaker level inputs
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 29324920234

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4.5 ★★★★★
Based on 27 reviews
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Verified Purchase
Kevin M
Waukegan, US
★★★★★ 1
Lower Quality than Competitors
Color: Black, Size: 8' Wide x 30" Tall
Construction is different from the Wall I brought from Children's Factory. Would recommend going there for a higher quality product and to save some money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
J
Jozy
Dallas, US
★★★★★ 4
Well made… for children?
Color: Black, Size: 8' Wide x 30" Tall
This review is for the 30” tall one. I’m honestly struggling to find a great use case for how short this is. I don’t have children or am associated with any institution where they may be some. I could see it being used for creating that type of sound barrier. The panel itself is very well made. Looks and feels like an air wall that you’d see in a convention center. I can absolutely tell there’s an acoustic absorption property to it. The whole thing unrolls quickly and is fast to deploy. As far as privacy goes, it’s kind of useless unless you are trying to wall in small children. I can’t really say the value is all here for this. Seems quite a bit more expensive than it’s worth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
Q
Quanisha pinkney
Massapequa, US
★★★★★ 5
Partition Wall
Color: Black, Size: 8' Wide x 30" Tall, Color: Black, Size: 8' Wide x 30" Tall
I ordered this to do a room divider for my grandkids can have there own space while sharing a room it gives the privacy the wall is very sturdy and heavy was easy to assemble the quality is great able to use individual or together for longer division great value for the money
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Reviewed in the United States on March 3, 2026
W
Warlord Commander Mike
San Leandro, US
★★★★★ 5
Very pleased
Color: Black, Size: 8' Wide x 30" Tall
This works great, and I find it to be very effective at soundproofing. The hinge is good quality, and it rolls up easily. It is slightly on the heavier side, but that is to be expected considering its larger size. The materials used to make it are top quality, and it will last a long time.
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Reviewed in the United States on February 2, 2026
B
B. Oberts
New York, US
★★★★★ 5
Trying to limit the sound from the basement.
I still am in process of evaluating the function of these but from an early assessment they do seem to help take the noise down a peg. I have installed these between the joists in my basement so that as my kids get ramped up playing video games it could possibly help prevent the sound from rattling the house. I did not need to use the sticky side for this as I was able to slide them in place around other things to hold them still. With four panels I have ok coverage of the area and if they continue to prove effective I will get more to fill out the area even more. They appear well made and of good size but I am not an expert in sound absorbing materials. Still so far so good.
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Reviewed in the United States on March 31, 2025

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