The KEF Kube 8 MIE ranks #20 out of 55 total Small Home Subwoofers (Under 30 lbs) for sound quality. See all Subwoofers rankings for every top pick.
Brand: KEF
Prices on this page were last checked October 3, 2026 at 10:26 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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#20 KEF Kube 8 MIE: $699.99 Estimated Amazon KEF eBay
Larger models: the KEF Kube 10 MIE (ranked higher, rated 3.8/5), the KEF Kube 12 MIE (rated 3.9/5) and the KEF Kube 15 MIE (rated 4/5).
Pros: Compact sealed enclosure with an 8-inch front-firing long-throw driver powered by a 300W Class-D amplifier. KEF Music Integrity Engine (MIE) DSP algorithm applies real-time iBX dynamic bass extension and three room-position EQ presets (wall/corner/cabinet). Accepts speaker-level and line-level inputs, plus KEF KW1 wireless kit integration.
Cons: 8-inch sealed driver rolls off below 34Hz (-6dB) and tops out at 105dB max SPL, which limits visceral home-theater infrasonic punch in medium to large rooms compared with larger subwoofers.
How it compares: Just above it: OSD (Optimal Speaker Design) SS8 - $451 cheaper. Just below it: Klipsch Flexus Sub 100 - $420 cheaper.
| Amplifier Power | 300W |
|---|---|
| Cabinet Color | black |
| Country | United Kingdom |
| Dimensions | 11.5”H x 11.5”W x 12.2”D (293 x 293 x 310 mm) |
| Drivers | 8” driver |
| Enclosure | sealed |
| Frequency Response | 34Hz - 140Hz (-6dB) (manufacturer specified) |
| Maximum SPL | 105 dB |
| Weight | 20.7 lbs (9.4 kg) |
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- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.