Short answer: the Monoprice Monolith M-215. It ranks #24 of 143 subwoofers by sound quality (rated 4.4/5) at $1,499.99 and is still sold new; the HSU Research VTF-15H MK2 ranks #57 (rated 4.2/5) and is discontinued, so it is only an option used. The HSU Research VTF-15H MK2’s replacement, the HSU Research VTF-TN1, is rated 3.9/5 at $1,249.
Buy the Monoprice Monolith M-215. It is rated higher for sound quality, and the HSU Research VTF-15H MK2 is discontinued, so it is only available used.
Looking for alternatives? See the complete Subwoofers rankings.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| HSU Research VTF-15H MK2 | Monoprice Monolith M-215 | |
|---|---|---|
| Price | $1,499 Discontinued | $1,499.99 |
| Ranked | #57 of 143 in Large Home Subwoofers (Over 75 lbs) | #24 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 15 Hz | 101.6 dB | 113.1 dB |
| Output SPL at 20 Hz | 108.4 dB | 118.9 dB |
| Output SPL at 25 Hz | 114.8 dB | 122.6 dB |
| Output SPL at 31.5 Hz | 119.4 dB | 125.2 dB |
| Output SPL at 40 Hz | 122.9 dB | 126.4 dB |
| Output SPL at 50 Hz | 122.5 dB | 126.1 dB |
| Output SPL at 63 Hz | 121.1 dB | 125.6 dB |
| Output SPL at 80 Hz | 120.5 dB | 125.6 dB |
| CEA-2010-A Average (40-80Hz) | 121.8 dB | 125.9 dB |
| Dimensions | 24”H x 18”W x 26”D (609.6 x 457.2 x 660.4 mm) | 42.3”H x 20”W x 27.6”D (1074.4 x 508.0 x 701.0 mm) |
| Weight | 110 lbs (49.9 kg) | 216.1 lbs (98.0 kg) |
| Warranty | 7/2(+3) | 5 |
| Cabinet Color | black, wood | black |
| Country | United States | United States |
| Measurement Source | Manufacturer | Brent Butterworth |
| Drivers | 15” (381mm) driver | 2x 15” (381mm) drivers |
| Output SPL at 12.5 Hz | - | 103.9 dB |
| Output SPL at 100 Hz | - | 125.7 dB |
| Output SPL at 125 Hz | - | 126.3 dB |
Related Speaker Comparisons
More worthwhile head-to-heads for Monoprice Monolith M-215:
