SKU: 28784141773

KEF Kube8b Subwoofer

Sale price$562.50 Regular price$625.00
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Ships within 48 hours · Estimated delivery Sep 26 - Oct 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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4.8 ★★★★★
Based on 17 reviews
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C
Verified Purchase
Cristianne M
Carnegie, US
★★★★★ 5
HE WON’T STOP PLAYING!!!!! Ha Ha!
Size: 3.5", Size: 3.5"
Just when I thought I couldn’t find a toy that would let me watch a 2 1/2 hour movie without interruption…. This came along!! I had to hide it overnight, but he saw where I hid it and he whined for 20 minutes until he finally went to sleep and they say dogs don’t have long-term memory well, this one as soon as I woke up was sitting right by the closet where the ball was hiding, he hasn’t let it go since ….the disco lights are fun, especially at night!!!The only thing is he’s biting the little spikes off but at least he’s spitting them out which is a good thing. Highly recommend for hours and hours of enjoyment plus it’s very bouncy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 13, 2023
K
Verified Purchase
Katie Porter
Lexington, US
★★★★★ 5
Dog's best friend
Size: 3.5"
Best ball ever! My dog loves it...the only improvement could be made is a tracking device, because when he loses it he is a lost little doggo!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
B
Verified Purchase
Betsy
Port Orchard, US
★★★★★ 3
Not what I received last time!
Size: 3.5"
I ordered this the first time and received a blue spiky squeak ball with LED lights when bounced. We loved this ball - its squeak was great, the bounce, durability, and flashing LED were perfect. Eventually the LED failed, but overall we loved this ball!! So I ordered a second - this time I received a yellow spiky squeak ball (with an insanely loud obnoxious squeak!!) that has no LED light. It’s still a great ball and my dog loves it. But it’s not what I was looking for since we like to play with the ball at night and need it to light up. Durability - 10/10, it’s very sturdy and feels like it will last a long time despite my dog being a heavy chewer. And my dog absolutely loves its obnoxious squeak!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2022
M
Verified Purchase
Miss Woods
Phoenix, US
★★★★★ 5
My dachshund’s new favorite toy!
Size: 3.5"
My dachshund absolutely LOVES this toy! The squeak, the lights, and the texture keep her entertained for long stretches of time. She carries it around nonstop and goes crazy for it every time I bring it out. It’s durable, fun, and definitely worth it if you have a playful pup who needs mental stimulation and something engaging. Highly recommend!
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Reviewed in the United States on November 20, 2025
S
Verified Purchase
Sarah Mason
Battle Creek, US
★★★★★ 5
If you were looking for a sign to buy this, here it is
Color: A) Small 2.5" Ball
If you are looking for a ball that can stand up next to a heavy, aggressive chewer.. this is a good choice. Our Pitbull literally destroyed any and every toy that she gets with the exception of one kind of kong ball. She tore through the kong Frisbees, any kind of squeaker toy, and the wobble wag giggle ball (she usually always ends up destroying these but it takes a few weeks. Today she beat her record and had her brand new ball destroyed within the first 30 minutes of us taking it out of the box). But, this ball she has not been able to destroy. I'd like to believe that the Kong ball she has and this ball are made of the same material. Because they are the only balls she can't ruin. And it's not because of a lack of trying. We have watched her sit there and chew with a side of her mouth for an hour or more, trying to make some kind of indention or tear in it and it just never happened. She loves to chew this thing, chase this thing, sleep with this thing. I most certainly recommend this ball. If it is I'ah proof then it is most certainly, 100% a durable ball and worth every penny
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Reviewed in the United States on May 7, 2026

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