Short answer: the Rythmik F12 for value, the Kef KC62 for size. The F12 is a sealed 12-inch servo sub with 370W RMS that offers excellent value. The KC62 counters with a basketball-sized sealed cabinet, dual 6.5-inch force-canceling drivers and 1000W, but it costs $1699.99 against the F12’s $1439.
What the Kef KC62 gets right: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure.
On the Rythmik F12 side: Sealed 12-inch servo with 370W RMS offers excellent value.
Buy the Rythmik F12. It is rated higher for sound quality than the Kef KC62 and costs less, so the other one has nothing left to offer.
Want more options? Browse the full Subwoofers rankings.
Specifications Side By Side
| Kef KC62 | Rythmik F12 | |
|---|---|---|
| Price | $1,699.99 | $1,120 |
| Ranked | #145 of 145 in Medium Home Subwoofers (30-75 lbs) | #20 of 145 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 20 Hz | 80.0 dB | 103.6 dB |
| Output SPL at 25 Hz | 84.6 dB | 106.7 dB |
| Output SPL at 31.5 Hz | 88.5 dB | 113.5 dB |
| Output SPL at 40 Hz | 92.2 dB | 118.3 dB |
| Output SPL at 50 Hz | 95.1 dB | 119.1 dB |
| Output SPL at 63 Hz | 97.7 dB | 120.4 dB |
| Output SPL at 80 Hz | 102.6 dB | 119.6 dB |
| Output SPL at 100 Hz | 104.2 dB | - |
| CEA-2010-A Average (40-80Hz) | 96.9 dB | 119.3 dB |
| Dimensions | 9.7"H x 10.1"W x 9.8"D (245.9 x 255.8 x 247.9 mm) | 15.7"H x 15.7"W x 17"D (400.0 x 400.0 x 431.8 mm) |
| Weight | 30.9 lbs (14.0 kg) | 75 lbs (34.0 kg) |
| Warranty | 5/2/5 | 5/3 |
| Cabinet Color | black, white | black |
| Country | United Kingdom | United States |
| Measurement Source | ErinsAudioCorner | Brent Butterworth |
| Amplifier Power | 1000W RMS | 370W RMS |
| Frequency Response | 11-200Hz | 14Hz extension |
| Drivers | 2x 6.5" (165mm) driver | 12" (305mm) driver |
| Output SPL at 16 Hz | - | 101.0 dB |
| Inputs | - | XLR (2), RCA (line/LFE) |
| XLR Input | - | Yes |
| RCA Input | - | Yes |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
Related Speaker Comparisons
How Rythmik F12 compares with other leading options:
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- Monoprice SW-12 vs Rythmik F12
- Rythmik F12 vs Power Sound Audio (PSA) XV15
Prices on this page were last checked September 23, 2026 at 11:24 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 KC62: $1,699.99 Amazon eBay
Pros: Dual 6.5-inch force-canceling drivers with 1000W in ultra-compact basketball-sized sealed enclosure. Deep extension to 11Hz with five room placement EQ presets. Elegant design fits any décor.
Full Kef KC62 review and specifications →
| Amplifier Power | 1000W RMS |
|---|---|
| CEA-2010-A Average (40-80Hz) | 96.9 dB |
| Cabinet Color | black, white |
| Country | United Kingdom |
| Dimensions | 9.7"H x 10.1"W x 9.8"D (245.9 x 255.8 x 247.9 mm) |
| Drivers | 2x 6.5" (165mm) driver |
| Enclosure | sealed |
| Frequency Response | 11-200Hz |
| Measurement Source | ErinsAudioCorner |
| Output SPL at 20 Hz | 80.0 dB |
| Output SPL at 25 Hz | 84.6 dB |
| Output SPL at 31.5 Hz | 88.5 dB |
| Output SPL at 40 Hz | 92.2 dB |
| Output SPL at 50 Hz | 95.1 dB |
| Output SPL at 63 Hz | 97.7 dB |
| Output SPL at 80 Hz | 102.6 dB |
| Output SPL at 100 Hz | 104.2 dB |
| Warranty | 5/2/5 |
| Weight | 30.9 lbs (14.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by ErinsAudioCorner; the published figures above come from this ASR subwoofer measurement thread.
- Head-to-Head Comparisons
Rythmik F12: $1,120 Rythmik Audio eBay
Pros: Sealed 12-inch servo with 370W RMS offers excellent value. Very musical and can disappear in small rooms. Digs to 14Hz with excellent build quality and well-braced cabinet.
Full Rythmik F12 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 370W RMS |
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 119.3 dB |
| Cabinet Color | black |
| Coaxial Input | No |
| Country | United States |
| Dimensions | 15.7"H x 15.7"W x 17"D (400.0 x 400.0 x 431.8 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 14Hz extension |
| HDMI Input | No |
| Inputs | XLR (2), RCA (line/LFE) |
| Measurement Source | Brent Butterworth |
| Optical Input | No |
| Output SPL at 16 Hz | 101.0 dB |
| Output SPL at 20 Hz | 103.6 dB |
| Output SPL at 25 Hz | 106.7 dB |
| Output SPL at 31.5 Hz | 113.5 dB |
| Output SPL at 40 Hz | 118.3 dB |
| Output SPL at 50 Hz | 119.1 dB |
| Output SPL at 63 Hz | 120.4 dB |
| Output SPL at 80 Hz | 119.6 dB |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5/3 |
| Weight | 75 lbs (34.0 kg) |
| XLR Input | Yes |
- 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