Short answer: the Monoprice SW-15. It ranks #8 of 137 subwoofers at $374.99; the Rythmik F12 ranks #51 and costs $1120, so there is not much of a tradeoff to weigh.
The case for the Monoprice SW-15: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Set against that: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.
What the Rythmik F12 gets right: Sealed 12-inch servo with 370W RMS offers excellent value.
Buy the Monoprice SW-15 if the ranking matters more than the price. Buy the Rythmik F12 if the price matters more than the ranking.
Specifications Side By Side
| Monoprice SW-15 | Rythmik F12 | |
|---|---|---|
| Price | $374.99 | $1,120 |
| Ranked | #8 of 137 in Medium Powered Home Subwoofers (30-75 lbs) | #51 of 137 in Medium Powered Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | sealed |
| Output SPL at 15 Hz | 90.0 dB | 95.0 dB |
| Output SPL at 20 Hz | 101.2 dB | 97.6 dB |
| Output SPL at 25 Hz | 106.3 dB | 100.7 dB |
| Output SPL at 31.5 Hz | 111.2 dB | 107.5 dB |
| Output SPL at 40 Hz | 116.0 dB | 112.3 dB |
| Output SPL at 50 Hz | 120.2 dB | 113.1 dB |
| Output SPL at 63 Hz | 120.5 dB | 114.4 dB |
| Output SPL at 80 Hz | 119.5 dB | 113.6 dB |
| CEA-2010-A Average (40-80Hz) | 119.0 dB | 113.3 dB |
| Dimensions | 18.1"H x 21.0"W x 22.7"D (459.7 x 533.4 x 576.6 mm) | 15.75"H x 15.75"W x 17.0"D (400.0 x 400.0 x 431.8 mm) |
| Weight | 66.1 lbs / 30.0 kg | 75 lbs / 34.0 kg |
| Warranty | 1 | 5/3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 30-150Hz (-10dB) | 14Hz extension |
| Power Output (Watts) | 600W RMS / 800W peak | 370W RMS |
| Crossover | 40-150Hz, 18dB/octave | - |
| Phase Control | 0° or 180° | - |
| Input Connections | Stereo line level and speaker level | - |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
The Two Speakers In Full
Monoprice SW-15: $374.99 Amazon
Pros: 15-inch ported with 600W RMS (800W peak) delivers Large-room Bassaholic rating. Unrivaled mid-bass punch for $375. Strong output with clean control. Dual speaker-level inputs and 40-150Hz crossover for flexible hookup.
Cons: Budget-tier design, ported room gain dependency, 30 kg mid-size, and limited dynamic headroom.
Notes: Product # 41499
| CEA-2010-A Average (40-80Hz) | 119.0 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Crossover | 40-150Hz, 18dB/octave |
| Dimensions | 18.1"H x 21.0"W x 22.7"D (459.7 x 533.4 x 576.6 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 30-150Hz (-10dB) |
| Input Connections | Stereo line level and speaker level |
| Measurement Source | Audioholics |
| Output SPL at 15 Hz | 90.0 dB |
| Output SPL at 20 Hz | 101.2 dB |
| Output SPL at 25 Hz | 106.3 dB |
| Output SPL at 31.5 Hz | 111.2 dB |
| Output SPL at 40 Hz | 116.0 dB |
| Output SPL at 50 Hz | 120.2 dB |
| Output SPL at 63 Hz | 120.5 dB |
| Output SPL at 80 Hz | 119.5 dB |
| Phase Control | 0° or 180° |
| Power Output (Watts) | 600W RMS / 800W peak |
| Warranty | 1 |
| Weight | 66.1 lbs / 30.0 kg |
- Head-to-Head Comparisons
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15SEICE-BASE
- Monoprice SW-15 vs SVS SB-3000
- Monoprice SW-15 vs Power Sound Audio (PSA) XS15
- Monoprice SW-15 vs Power Sound Audio (PSA) XV15-BASE
- Monoprice SW-15 vs HSU Research ULS-15 MK2
- Monoprice SW-15 vs MartinLogan Dynamo 1600X
- Monoprice SW-15 vs JTR Speakers Captivator 212PRO
- Monoprice SW-15 vs SVS PB-1000 PRO
- See all 18 comparisons
- Links
Rythmik F12: $1,120
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.
| CEA-2010-A Average (40-80Hz) | 113.3 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 15.75"H x 15.75"W x 17.0"D (400.0 x 400.0 x 431.8 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | sealed |
| Frequency Response | 14Hz extension |
| Measurement Source | Brent Butterworth |
| Output SPL at 15 Hz | 95.0 dB |
| Output SPL at 20 Hz | 97.6 dB |
| Output SPL at 25 Hz | 100.7 dB |
| Output SPL at 31.5 Hz | 107.5 dB |
| Output SPL at 40 Hz | 112.3 dB |
| Output SPL at 50 Hz | 113.1 dB |
| Output SPL at 63 Hz | 114.4 dB |
| Output SPL at 80 Hz | 113.6 dB |
| Power Output (Watts) | 370W RMS |
| Warranty | 5/3 |
| Weight | 75 lbs / 34.0 kg |
- Head-to-Head Comparisons
- Rythmik F12 vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- Rythmik F12 vs SVS SB-2000
- Rythmik F12 vs Monoprice SW-12
- Rythmik F12 vs Klipsch R-121SW
- Rythmik F12 vs SVS PB-1000 PRO
- Rythmik F12 vs Monoprice Monolith M-10 V2
- Rythmik F12 vs SVS SB-3000
- Rythmik F12 vs HSU Research ULS-15 MK2
- See all 14 comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.