- 8″ active subwoofer
Ensures robust bass with low distortion. - 300W Class-D amplifier with DSP preamplifier/EQ
Delivers immersive music and home theater sounds that drive you deeper into the heart of the performance. - Intelligent Bass Extension (iBX) algorithm
Creates an extended depth that unlocks the full potential of the custom driver. - KEF smartConnect intelligent inputs
Automatically detect mono or stereo and adjust the subwoofer volume level accordingly. - Placement tuning presets
Include freestanding, wall/in-cabinet, and corner, which means this Kube subwoofer sounds perfect wherever it’s installed. - Sealed enclosure
Provides greater accuracy and delicate musical detail while allowing Kube to be installed in a cabinet. - LFE (RCA), line-in (RCA) and speaker-level inputs (Phoenix-type terminal)
Ensure a secure connection. - 34 – 140Hz (±3dB) frequency response
Delivers booming lows for an immersive soundscape.
-36%
KEF – Kube 8″ 300W Powered Subwoofer – Black
$288.00 Save:$161.00(36%)
Available in stock
Description
Additional information
| Weight | 11.5 lbs |
|---|---|
| Dimensions | 17 × 15 × 16 in |
| Wireless Multi-Room Audio | No |
| Amplifier Class | D |
| Product Depth | 17 inches |
| Remote Control Included | No |
| Wi-Fi Built-in | No |
| Color | Black |
| High-Pass Crossover | None |
| Maximum Frequency Response | 0.14 kilohertz |
| Manufacturer's Warranty - Labor | 2 years |
| Controls | Cut frequency |
| Enclosed | Yes |
| Enclosure Type | Sealed |
| Low-Pass Crossover | Variable |
| Manufacturer's Warranty - Parts | 2 Years |
| Wireless | No |
| Product Weight | 11.5 pounds |
| Input(s) | Speaker |
| Integrated Amplifier | Yes |
| Model Number | KUBE8B |
| Woofer Size | 8 inches |
| Speaker Type | Floorstanding |
| Minimum Frequency Response | 34 hertz |
| Product Height | 16 inches |
| Indoor Or Outdoor Use | Indoor |
| Product Name | Kube 8" 300W Powered Subwoofer |
| Brand | KEF |
| Subwoofer Type | Powered |
| Color Category | Black |
| Cable(s) Included | None |
| RMS Power | 300 watts |
| Product Width | 15 inches |
| UPC | 637203215223 |
Reviews (20)
No products in the cart. 
chef55 –
I use this KEF subwoofer in a big room and it is way more than enough. I highly recommend because of its compact size and quality. This is a very high end sounding piece of equipment. I also have a KEF subwoofer in our bedroom set up and it works great there as well.
Myc1 –
Very impressed with the kef Kube 8b subwoofer. Perfect for a small to midsize room. This sub packs a punch and produces low but tonally controlled bass notes. Sounds great paired with my KEF LS50 wireless setup. Definitely worth it.
Oldman65 –
This is the perfect size woofer for a medium size room excellent quality great sound
BondJamesBond –
I like the size. It’s a little larger than a one foot cube but produces a tremendous low frequency sound that is not boomie and is capable of filling a 14×22 foot room. I don’t like the fact that it does not have auto on/off capability. Other than that it is great.
USNSailor –
I added this to go with the KEF floorstanding and center channel speakers I purchased. Was initially concerned that the KUBE8 wouldn’t be strong enough to fill my 24 x 17 open living room, but I was pleasantly surprised with this subwoofer. I had listened to SVS and a few others in the magnolia room and was leaning towards one of the other brands. Once I got this into my room, it filled the room with more bass than I was expecting from this little sub. The little KEF KUBE8 did a great job for me and I’ll be keeping it!
ILK1 –
Compared to other less expensive, similarly sized sub-woofers I have owned, this is by far the best bass sounds I have experienced. Thanks to Jon Hatcher for his recommendation.
Billshometv –
Great sound without taking up a lot of floor space
Alex –
KEF is the leader in sound products and my KEF-Kube 8″ 300w Powered Subwoofer is a complement for my Audio-Video System.
KEF is the Best!
1968 –
KEF Kube 8″ 300W Powered Subwoofer they both sound great
UNCLEAR –
Good bass response, seems to enhance the low end especially with music.
BKSchoffner –
Having a smaller, open family room space I didn’t want, or need, a 10 or 12 inch sub-woofer. Keeping the nails in the walls, and pictures hanging seemed to be a good thing.
I spent some time with the BB salesperson and once he understood where I was at, he went right to the KEF 8” unit. This thing has more than enough juice to make sure you experience Maverick at his best or Smaug in all his glory without making the windows wish they were better quality.
Smaller unit can be tucked away and it’s beautiful black finish makes it easy on the eyes if you do see it. Brits did a nice job with this product. Just follow the instruction suggestions to get great bass and low end response.
MichelleW –
You don’t even know it’s there until it’s there! Packs a boom and we like it
TechNovice –
The salesperson ann in-home consult recommended KEF. I also have KEF in-ceiling speakers, which are great. However, the subwoofer seems to be lacking in sound quality. I do not know anything about audio other than that I like good-quality surround sound. So considering my expectation of having a booming subwoofer similar to a rocking car that passes you on the road, I am disappointed, assuming that expectation is correct. If it is not, then I guess it does the trick. At least, I am not rocking the house down.
RobertS –
Great product. Fills room with sound. Would buy again.
Sammy –
I have a set of Definitive Technology Mythos that I purchased in 2004. I set them up in my home gym, but needed an appropriate subwoofer to compliment them. The KEF Kube8b was a wonderful choice. The room is the size of a large bedroom. The Kube8b has plenty of punch, while blending beautifully with the DefTecs.
MikeG –
You get a big sound from this little subwoofer. It is the perfect size if you have a small room.
user545770 –
It compact power sub with clear dynamic sound. Easy to set up
Denononon –
perfect size and power. I will be getting a second one to complete a 7.2 set up later this year
Kelsey –
Very solid subwoofer. Works great for movies and music.
Unknown –
Great sound quality for a great looking speaker. Worth it