Short answer: the Monoprice SW-12 on value, the HSU Research ULS-15 MK2 on build and output. The SW-12 is a 12-inch ported sub with 400W RMS (600W peak) that costs $634.01 less and hits hard with clean, tight transient response, but it has entry-level build quality, ported enclosure room interaction and lower 112.3 dB output capability. The ULS-15 MK2’s sealed design delivers tight, accurate bass with low bloat.
Buy the Monoprice SW-12. Both are rated the same for sound quality, and it costs $634.01 less than the HSU Research ULS-15 MK2.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| HSU Research ULS-15 MK2 | Monoprice SW-12 | |
|---|---|---|
| Price | $999.00 | $364.99 |
| Ranked | #4 of 212 in Medium Home Subwoofers (30-75 lbs) | #6 of 212 in Medium Home Subwoofers (30-75 lbs) |
| Enclosure | sealed | ported, bottom |
| Output SPL at 12.5 Hz | 93.7 dB | - |
| Output SPL at 15 Hz | 98.0 dB | - |
| Output SPL at 20 Hz | 102.4 dB | 102.7 dB |
| Output SPL at 25 Hz | 107.7 dB | 111.1 dB |
| Output SPL at 31.5 Hz | 113.4 dB | 115.2 dB |
| Output SPL at 40 Hz | 118.3 dB | 119.0 dB |
| Output SPL at 50 Hz | 120.8 dB | 119.7 dB |
| Output SPL at 63 Hz | 121.2 dB | 122.9 dB |
| Output SPL at 80 Hz | 121.1 dB | 123.0 dB |
| Output SPL at 100 Hz | 120.7 dB | - |
| Output SPL at 125 Hz | 120.7 dB | - |
| CEA-2010-A Average (40-80Hz) | 120.3 dB | 121.2 dB |
| Dimensions | 19”H x 18”W x 19.5”D (482.6 x 457.2 x 495.3 mm) | 14.9”H x 18.3”W x 19.1”D (378.5 x 464.8 x 485.1 mm) |
| Weight | 65 lbs (29.5 kg) | 50.7 lbs (23.0 kg) |
| Warranty | 7/2(+3) | 1 |
| Cabinet Color | black, wood | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Brent Butterworth |
| Frequency Response | 20-200Hz, ±1dB | 35-150Hz, -10dB |
| Amplifier Power | 600W RMS / 2000W peak | 400W RMS / 600W peak |
| Crossover Frequency | 30-90Hz adjustable | - |
| Phase Control | 0°-180° | - |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes | - |
| Drivers | 15” (381mm) driver | 12” (305mm) driver |
| Output SPL at 16 Hz | - | 90.6 dB |
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