Short answer: the Rythmik F12. It ranks #21 of 212 subwoofers by sound quality (rated 4.1/5) at $1,439 and is still sold new; the Monitor Audio RXW12 ranks #135 (rated 3.6/5) and is discontinued, so it is only an option used.
The Rythmik F12 is the better-sounding pick. A sealed servo subwoofer with deep, musical bass and excellent build quality, a strong value for music lovers. The tradeoff: The sealed 12-inch driver cannot reproduce the deepest cinema effects, so a pair is advised for theater.
What the Monitor Audio RXW12 does well: A sealed 12 inch subwoofer with a strong amplifier for small to medium rooms, now discontinued. Watch for: Output drops to 97.9dB at 31.5Hz and 88.9dB at 20Hz, so deep bass is limited.
Buy the Rythmik F12. It is rated higher for sound quality, and the Monitor Audio RXW12 is discontinued, so it is only available used.
Still deciding? The full Subwoofers rankings cover every ranked option.
A sealed servo subwoofer with deep, musical bass and excellent build quality, a strong value for music lovers.
A sealed 12 inch subwoofer with a strong amplifier for small to medium rooms, now discontinued.
Prices on this page were last checked October 31, 2026 at 7:11 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Rythmik F12 | Monitor Audio RXW12 | |
|---|---|---|
| Price | $1,439 | $799 Discontinued |
| Ranked | #21 of 212 in Medium Home Subwoofers (30-75 lbs) | #135 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | sealed |
| Output SPL at 20 Hz | 103.6 dB | 88.9 dB |
| Output SPL at 25 Hz | 106.7 dB | 92.0 dB |
| Output SPL at 31.5 Hz | 113.5 dB | 97.9 dB |
| Output SPL at 40 Hz | 118.3 dB | 111.5 dB |
| Output SPL at 50 Hz | 119.1 dB | 114.9 dB |
| Output SPL at 63 Hz | 120.4 dB | 106.3 dB |
| Output SPL at 80 Hz | 119.6 dB | - |
| CEA-2010-A Average (40-80Hz) | 119.3 dB | 110.9 dB (avg of 3/4 bands) |
| Dimensions | 15.7”H x 15.7”W x 17”D (400.0 x 400.0 x 431.8 mm) | 15”H x 16.9”W x 16.9”D (381.0 x 430.0 x 430.0 mm) |
| Weight | 75 lbs (34.0 kg) | 49.8 lbs (22.6 kg) |
| Warranty | 5/3 | 5 |
| Cabinet Color | black | - |
| Country | United States | United Kingdom |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Amplifier Power | 370W RMS | 500W RMS |
| Frequency Response | 14Hz extension | 21-40Hz |
| Drivers | 12” (305mm) 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
More top alternatives to Rythmik F12: