Short answer: both are discontinued, so this only matters if you are buying used. Used, the HSU Research VTF-15H MK2 is the better pick: it ranks #57 of 143 subwoofers by sound quality (rated 4.2/5), against #88 (rated 4.1/5) for the Monoprice Monolith M15-S. If you want one new, the HSU Research VTF-TN1 replaces the HSU Research VTF-15H MK2 and is rated 3.9/5 at $1,249.
Buy the HSU Research VTF-15H MK2 only if you find one used in good condition; both are discontinued, and it is the better rated of the two. For a new speaker, buy the HSU Research VTF-TN1, which replaces the HSU Research VTF-15H MK2.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| HSU Research VTF-15H MK2 | Monoprice Monolith M15-S | |
|---|---|---|
| Price | $1,499 Discontinued | $999 Discontinued |
| Ranked | #57 of 143 in Large Home Subwoofers (Over 75 lbs) | #88 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| Output SPL at 15 Hz | 101.6 dB | 100.1 dB |
| Output SPL at 20 Hz | 108.4 dB | 105.6 dB |
| Output SPL at 25 Hz | 114.8 dB | 111.2 dB |
| Output SPL at 31.5 Hz | 119.4 dB | 115.2 dB |
| Output SPL at 40 Hz | 122.9 dB | 118.4 dB |
| Output SPL at 50 Hz | 122.5 dB | 119.3 dB |
| Output SPL at 63 Hz | 121.1 dB | 119.6 dB |
| Output SPL at 80 Hz | 120.5 dB | 118.9 dB |
| CEA-2010-A Average (40-80Hz) | 121.8 dB | 119.0 dB |
| Dimensions | 24”H x 18”W x 26”D (609.6 x 457.2 x 660.4 mm) | 23.5”H x 16.7”W x 19.7”D (596.9 x 424.2 x 500.4 mm) |
| Weight | 110 lbs (49.9 kg) | 80 lbs (36.3 kg) |
| Warranty | 7/2(+3) | 5 |
| Cabinet Color | black, wood | - |
| Country | United States | United States |
| Measurement Source | Manufacturer | Manufacturer |
| Drivers | 15” (381mm) driver | 15” (381mm) driver |
| Output SPL at 100 Hz | - | 119.1 dB |
| Output SPL at 125 Hz | - | 118.9 dB |
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