SKU: 29324920234

KEF Kube12b Subwoofer

Sale price$742.50 Regular price$825.00
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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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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Casandra
Lowell, US
★★★★★ 5
goose down pillows.
Color: White, Size: King Size Set of 2
Since receiving them, these king-size white goose down pillows have truly transformed my sleep. They are incredibly soft and fluffy to the touch, so plush it's hard to believe they hold their shape. Sleeping on them is like lying on a cloud. The 100% cotton cover adds extra comfort: it feels cool to the touch, breathes well throughout the night, and helps me maintain a comfortable temperature while I sleep. Furthermore, the "reinforced fiber" structure is noticeable: after several weeks of use, the pillows retain their support; they don't clump or lose their shape, ensuring consistently good rest. I find they have the ideal balance between firmness and softness: firm enough to support my neck and head, yet plush enough to adapt to my posture without creating pressure. This has improved my nights; I sleep more soundly and wake up with less stiffness in my neck. In short: these pillows combine luxury, comfort, and durability. If you're looking to improve your sleep quality with soft, firm, and breathable pillows—especially in king size—these are perfect. Definitely one of the best investments you can make for better sleep.
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Reviewed in the United States on November 30, 2025
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María Mondeja
Natrona Heights, US
★★★★★ 5
Perfect Balance of Comfort and Support!!
Size: King / 2 Packs, Color: White/Soft
I’ve been using these pillows for a few days now, and they’ve been amazing. They’re soft but still have that medium-firm support that keeps my neck comfortable no matter how I sleep. The 100% cotton cover feels really smooth and breathable, and I love that they’re hypoallergenic. They fluff up nicely after washing and keep their shape well. Honestly, they feel like hotel-quality pillows at home
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Reviewed in the United States on May 4, 2026
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Daine
Massapequa, US
★★★★★ 5
Juego de 2 almohadas
Size: Queen / 2 Packs, Color: White/Soft
These pillows are incredibly soft and comfortable! They provide the perfect balance between support and fluffiness, making them great for any sleeping position. The quality feels premium, and they stay cool throughout the night. Definitely a great purchase!
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Reviewed in the United States on April 21, 2026
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Eslaine Alvarez
Cuba, US
★★★★★ 5
Very comfortable
Size: Queen / 2 Packs, Color: White/Soft
These pillows are the best investment I could have possibly made. They are of incredible quality and are soft—qualities that allow you to rest much better, as prioritizing such things is essential for achieving deep sleep. And with a super soft fabric.
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Joandra Dobao
Charlottesville, US
★★★★★ 4
Okay pillows
Size: King / 2 Packs, Color: White/Soft
Soft and comfortable, the only downside to the pillows is that the feathers pop out from the cover and pinch
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Reviewed in the United States on March 5, 2026

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