Short answer: the Monoprice SW-12. It ranks #32 of 137 subwoofers at $230; the Rythmik F12 ranks #51 and costs $1120, so there is not much of a tradeoff to weigh.
On the Monoprice SW-12 side: 12-inch ported with 400W RMS (600W peak) on a budget at just $230. Hits hard with clean tight transient response. Set against that: Entry-level build quality, ported enclosure room interaction, and lower 112.3 dB output capability.
The case for the Rythmik F12: Sealed 12-inch servo with 370W RMS offers excellent value.
Buy the Monoprice SW-12 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-12 | Rythmik F12 | |
|---|---|---|
| Price | $230 | $1,120 |
| Ranked | #32 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 | 84.6 dB | 95.0 dB |
| Output SPL at 20 Hz | 96.7 dB | 97.6 dB |
| Output SPL at 25 Hz | 105.1 dB | 100.7 dB |
| Output SPL at 31.5 Hz | 109.2 dB | 107.5 dB |
| Output SPL at 40 Hz | 113.0 dB | 112.3 dB |
| Output SPL at 50 Hz | 113.7 dB | 113.1 dB |
| Output SPL at 63 Hz | 116.9 dB | 114.4 dB |
| Output SPL at 80 Hz | 117.0 dB | 113.6 dB |
| CEA-2010-A Average (40-80Hz) | 115.2 dB | 113.3 dB |
| Dimensions | 14.9"H x 18.3"W x 19.1"D (378.5 x 464.8 x 485.1 mm) | 15.75"H x 15.75"W x 17.0"D (400.0 x 400.0 x 431.8 mm) |
| Weight | 50.7 lbs / 23.0 kg | 75 lbs / 34.0 kg |
| Warranty | 1 | 5/3 |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Brent Butterworth |
| Frequency Response | 35-150Hz, -10dB | 14Hz extension |
| Power Output (Watts) | 400W RMS / 600W peak | 370W RMS |
| Drivers | 12" (305mm) driver | 12" (305mm) driver |
The Two Speakers In Full
Monoprice SW-12: $230 Amazon
Pros: 12-inch ported with 400W RMS (600W peak) on a budget at just $230. Hits hard with clean tight transient response. Variable crossover and volume controls for setup flexibility. Speaker-level and line-level inputs for easy integration.
Cons: Entry-level build quality, ported enclosure room interaction, and lower 112.3 dB output capability.
Notes: Product # 41498
| CEA-2010-A Average (40-80Hz) | 115.2 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 14.9"H x 18.3"W x 19.1"D (378.5 x 464.8 x 485.1 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, bottom |
| Frequency Response | 35-150Hz, -10dB |
| Measurement Source | Brent Butterworth |
| Output SPL at 15 Hz | 84.6 dB |
| Output SPL at 20 Hz | 96.7 dB |
| Output SPL at 25 Hz | 105.1 dB |
| Output SPL at 31.5 Hz | 109.2 dB |
| Output SPL at 40 Hz | 113.0 dB |
| Output SPL at 50 Hz | 113.7 dB |
| Output SPL at 63 Hz | 116.9 dB |
| Output SPL at 80 Hz | 117.0 dB |
| Power Output (Watts) | 400W RMS / 600W peak |
| Warranty | 1 |
| Weight | 50.7 lbs / 23.0 kg |
- Head-to-Head Comparisons
- Monoprice SW-12 vs SVS PB-1000 PRO
- Monoprice SW-12 vs SVS SB-3000
- Monoprice SW-12 vs Monoprice SW-15
- Monoprice SW-12 vs HSU Research ULS-15 MK2
- Monoprice SW-12 vs MartinLogan Dynamo 1600X
- Monoprice SW-12 vs JTR Speakers Captivator 212PRO
- Monoprice SW-12 vs RSL (Rogersound Labs) Speedwoofer 10S MKII
- Monoprice SW-12 vs SVS SB-2000
- See all 13 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 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 Monoprice SW-15
- 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.