SKU: 28784141773

KEF Kube8b Subwoofer

Sale price$562.50 Regular price$625.00
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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

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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: 28784141773

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Frank R.
Chelsea, US
★★★★★ 4
Not bad for the money
Color: Blue, Size: X-Large
Not bad for the money, BUT, not high quality fabric (KINDA wrinkles easily, but Ironed nicely.. Stitching was decent.. Only washed one time (inside out and in cold), so it's kinda early to fully rate, but I will not over -wash it...For a musician, it's kinda nice ...Might buy a couple more for the stage👍
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Reviewed in the United States on September 23, 2025
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Aleya Signor
Massapequa, US
★★★★★ 5
Sexy Shirt!
Color: White, Size: Large
My husband loves it. He says it’s soft and very comfortable. Flexible with his body but not tight at all. He’s a size large, 180# with welding pipes! He’s a welder by trade so his biceps are decent, this shirt doesn’t strangle them. He looks amazing in it and it wears well and comfortably under a suit or sports jacket. True to size and color.
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Reviewed in the United States on January 16, 2026
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Celticsgyrl34
San Leandro, US
★★★★★ 5
5/5 Stars
Color: 01-black, Size: Large, Color: 01-black, Size: Large
I absolutely love this black cowboy shirt! The first time I put it on, I could feel the quality. The material is comfortable but sturdy, and the embroidery on the front and sleeves is just beautiful. It gives that true Western vibe while still looking classy and modern. What I really like most is the fit — it’s sharp and clean but still gives me room to move and stay comfortable. I paired it with my boots and belt, and the whole outfit came together perfectly. I’ve gotten so many compliments wearing this shirt, and it definitely makes me feel confident and put together. Whether I’m dressing up for an event or just want to rock a casual cowboy look, this shirt never misses. It’s definitely one of my favorite pieces in my closet now!
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Reviewed in the United States on September 7, 2025
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Amazolia
Grantham, US
★★★★★ 3
Too loose
Color: Black (Retro Rose), Size: Small
I really like this shirt, but unfortunately it is way too loose for a size S. It looks like a XL. A shirt like that should be tight.
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Reviewed in the United States on May 7, 2026
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I bought these on Sept 23rd and they fell apart on me already not even 45 days. Won’t be buying any Lugz shoes again
Charlottesville, US
★★★★★ 5
Excellent choice
Love this shirt looked better in person then on the picture fit perfectly and true to size
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Reviewed in the United States on March 31, 2026

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