Short answer: a real tradeoff between driver size and amplifier headroom. The Monoprice SW-12 gives you a 12-inch ported cabinet with 400W RMS (600W peak), clean tight transients and a 112.3 dB output figure, at the cost of entry-level build and ported room interaction. The RSL Speedwoofer 10S MKII is smaller at 10 inches but brings 400W RMS with a 1020W peak XDR amplifier.
Buy the Monoprice SW-12. It is rated higher for sound quality than the RSL (Rogersound Labs) Speedwoofer 10S MKII and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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Specifications Side By Side
| Monoprice SW-12 | RSL (Rogersound Labs) Speedwoofer 10S MKII | |
|---|---|---|
| Price | $364.99 | $499 |
| Ranked | #6 of 212 in Medium Home Subwoofers (30-75 lbs) | #124 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | ported, bottom | ported, rear |
| Output SPL at 20 Hz | 102.7 dB | 100.0 dB |
| Output SPL at 25 Hz | 111.1 dB | 105.0 dB |
| Output SPL at 31.5 Hz | 115.2 dB | 107.7 dB |
| Output SPL at 40 Hz | 119.0 dB | 110.3 dB |
| Output SPL at 50 Hz | 119.7 dB | 112.9 dB |
| Output SPL at 63 Hz | 122.9 dB | 113.0 dB |
| Output SPL at 80 Hz | 123.0 dB | 112.1 dB |
| CEA-2010-A Average (40-80Hz) | 121.2 dB | 112.1 dB |
| Dimensions | 14.9”H x 18.3”W x 19.1”D (378.5 x 464.8 x 485.1 mm) | 15.5”H x 15”W x 15.7”D (393.7 x 381.0 x 400.0 mm) |
| Weight | 50.7 lbs (23.0 kg) | 40.6 lbs (18.4 kg) |
| Warranty | 1 | 5/2 |
| Cabinet Color | black | black, white |
| Country | United States | United States |
| Measurement Source | Brent Butterworth | Audioholics |
| Frequency Response | 35-150Hz, -10dB | 21-200Hz |
| Amplifier Power | 400W RMS / 600W peak | 400W RMS |
| Drivers | 12” (305mm) driver | 10” (254mm) driver |
| Output SPL at 16 Hz | 90.6 dB | - |
| Output SPL at 15 Hz | - | 89.0 dB |
| Output SPL at 100 Hz | - | 111.4 dB |
| Output SPL at 125 Hz | - | 110.7 dB |
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