Short answer: the Rythmik LV12 has been measured and ranked among subwoofers; the KEF Kube 10 MIE has not been independently measured yet, so until it is, this comes down to features and price.
The case for the KEF Kube 10 MIE: Sealed cabinet with a 10-inch driver and 300W of amplification, tuned by KEF’s Music Integrity Engine DSP.
On the Rythmik LV12 side: 12-inch ported with 300W RMS, direct servo control extends 19Hz.
Buy the Rythmik LV12 if you want a speaker whose sound quality has been measured and ranked.
Buy the KEF Kube 10 MIE if you prefer its design or features, and you can wait for measurements to confirm how it sounds.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| KEF Kube 10 MIE | Rythmik LV12 | |
|---|---|---|
| Price | $899.99 | $899 |
| Ranked | - | #7 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, front |
| Drivers | 10” driver | 12” (305mm) driver |
| Amplifier Power | 300W | 300W RMS |
| Cabinet Color | black | black |
| Country | United Kingdom | United States |
| Output SPL at 20 Hz | - | 107.7 dB |
| Output SPL at 25 Hz | - | 113.2 dB |
| Output SPL at 31.5 Hz | - | 116.6 dB |
| Output SPL at 40 Hz | - | 120.2 dB |
| Output SPL at 50 Hz | - | 120.4 dB |
| Output SPL at 63 Hz | - | 121.2 dB |
| Output SPL at 80 Hz | - | 119.3 dB |
| CEA-2010-A Average (40-80Hz) | - | 120.3 dB |
| Dimensions | - | 19.5”H x 15”W x 18.5”D (495.3 x 381.0 x 469.9 mm) |
| Weight | - | 69 lbs (31.3 kg) |
| Warranty | - | 5/3 |
| Measurement Source | - | Brent Butterworth |
| Frequency Response | - | 19Hz-300Hz |
| Output SPL at 16 Hz | - | 101.0 dB |
Prices on this page were last checked September 29, 2026 at 3:43 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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The Two Speakers In Full
KEF Kube 10 MIE: $899.99 KEF eBay
Older model: the Kef Kube 10B (rated 3.7/5).
Pros: Sealed cabinet with a 10-inch driver and 300W of amplification, tuned by KEF’s Music Integrity Engine DSP. The sealed design is easier to place than a ported one and suits music.
Cons: No independent measurements yet, so its output can’t be compared with ranked subwoofers. A single 10-inch sealed driver limits deep output in a large room.
Full KEF Kube 10 MIE review and specifications →
| Amplifier Power | 300W |
|---|---|
| Cabinet Color | black |
| Country | United Kingdom |
| Drivers | 10” driver |
| Enclosure | sealed |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
Rythmik LV12: $899 Rythmik Audio eBay
Pros: 12-inch ported with 300W RMS, direct servo control extends 19Hz. Switchable Q settings (19Hz Low/22Hz Med/24Hz High) adjust bass response and loudness. 5-year driver warranty. Phase and crossover controls for flexible integration.
Full Rythmik LV12 review and specifications →
| Amplifier Power | 300W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 120.3 dB |
| Cabinet Color | black |
| Country | United States |
| Dimensions | 19.5”H x 15”W x 18.5”D (495.3 x 381.0 x 469.9 mm) |
| Drivers | 12” (305mm) driver |
| Enclosure | ported, front |
| Frequency Response | 19Hz-300Hz |
| Measurement Source | Brent Butterworth |
| Output SPL at 16 Hz | 101.0 dB |
| Output SPL at 20 Hz | 107.7 dB |
| Output SPL at 25 Hz | 113.2 dB |
| Output SPL at 31.5 Hz | 116.6 dB |
| Output SPL at 40 Hz | 120.2 dB |
| Output SPL at 50 Hz | 120.4 dB |
| Output SPL at 63 Hz | 121.2 dB |
| Output SPL at 80 Hz | 119.3 dB |
| Warranty | 5/3 |
| Weight | 69 lbs (31.3 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons