Short answer: the HSU Research ULS-15 MK2 for a sealed, controlled design, the Monoprice SW-15 for cheap large-room output. The SW-15 is a 15-inch ported sub with 600W RMS (800W peak) and a Large-room Bassaholic rating, but it has a budget-tier design, ported room gain dependency, a 30 kg (66.1 lbs) mid-size cabinet and limited dynamic headroom. It costs $499.01 less than the ULS-15 MK2, whose sealed design delivers tight, accurate bass with low bloat.
Buy the HSU Research ULS-15 MK2 if sound quality is the priority over the price, or the Monoprice SW-15 if the price is the priority over sound quality.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| HSU Research ULS-15 MK2 | Monoprice SW-15 | |
|---|---|---|
| Price | $999.00 | $499.99 |
| Ranked | #4 of 212 in Medium Home Subwoofers (30-75 lbs) | #14 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 | 90.0 dB |
| Output SPL at 20 Hz | 102.4 dB | 101.2 dB |
| Output SPL at 25 Hz | 107.7 dB | 106.3 dB |
| Output SPL at 31.5 Hz | 113.4 dB | 111.2 dB |
| Output SPL at 40 Hz | 118.3 dB | 116.0 dB |
| Output SPL at 50 Hz | 120.8 dB | 120.2 dB |
| Output SPL at 63 Hz | 121.2 dB | 120.5 dB |
| Output SPL at 80 Hz | 121.1 dB | 119.5 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 | 119.0 dB |
| Dimensions | 19”H x 18”W x 19.5”D (482.6 x 457.2 x 495.3 mm) | 18.1”H x 21”W x 22.7”D (459.7 x 533.4 x 576.6 mm) |
| Weight | 65 lbs (29.5 kg) | 66.1 lbs (30.0 kg) |
| Warranty | 7/2(+3) | 1 |
| Cabinet Color | black, wood | black |
| Country | United States | United States |
| Measurement Source | Audioholics | Audioholics |
| Frequency Response | 20-200Hz, ±1dB | 30-150Hz (-10dB) |
| Amplifier Power | 600W RMS / 2000W peak | 600W RMS / 800W peak |
| Crossover Frequency | 30-90Hz adjustable | 40-150Hz, 18dB/octave |
| Phase Control | 0°-180° | 0° or 180° |
| Features | Q control, sealed subwoofer, EQ1/EQ2 modes | - |
| Drivers | 15” (381mm) driver | 15” (381mm) driver |
| Inputs | - | Stereo line level and speaker level |
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