SKU: 87456204644

KEF Kube8b Subwoofer

Sale price$562.50 Regular price$625.00
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Ships within 48 hours · Estimated delivery Sep 12 - Sep 17

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Description

KEF Kube8b Subwoofer8 inches bass driver 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 inches driver the Kube8b is perfect for smaller living rooms. It shares the 300 Watts Class D amp from the bigger Kubes and has iBX technology to extend the bass depth dynamically. Hear new dimensions in sound with Kube subwoofers The Kube 8b effortlessly unleashes explosive power.

8 inches bass driver 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 inches driver the Kube8b is perfect for smaller living rooms. It shares the 300 Watts Class D amp from the bigger Kubes and has 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.

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 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
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: 87456204644

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4.7 ★★★★★
Based on 28 reviews
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María Mondeja
San Leandro, 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
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
D
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Daine
Phoenix, 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
E
Verified Purchase
Eslaine Alvarez
Chelsea, 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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Reviewed in the United States on April 17, 2026
J
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Joandra Dobao
Grantham, 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
M
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Molly
Chelsea, US
★★★★★ 1
Do not recommend
Size: Standard / 2 Packs, Color: White/Soft
At an Airbnb in Marine CA, these pillows were on my bed. They were so wonderful, I took a picture of the label so I could order them for myself. After a few weeks, the feathers began working out of casing and would poke my head. I then put them in two pillowcases thinking that would make a difference- nope. When I removed the outer pillowcase to launder, there were 69-80 little feathers between the two layers. I went back to my old pillows and although they aren’t as great as down pillows, I don’t miss being poked and finding little feathers between the pillowcases and in my bedroom. Four months later, I am still finding a few random feathers in my bedroom.
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Reviewed in the United States on February 11, 2026

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