Short answer: the Monoprice Monolith M-215 on measured sound quality, the HSU Research VTF-15H MK2 on price. The Monoprice Monolith M-215 ranks #23 of 110 subwoofers, rated 4.4/5, at $2999.99. The HSU Research VTF-15H MK2 ranks #50, rated 4.2/5, at $1499, $1500.99 cheaper.
On the HSU Research VTF-15H MK2 side: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series. The catch: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg (110.2 lbs) size, and $1,500 price point.
Buy the HSU Research VTF-15H MK2 if the price is the priority over sound quality, or the Monoprice Monolith M-215 if sound quality is the priority over the price.
Looking for alternatives? See the complete Subwoofers rankings.
Specifications Side By Side
| HSU Research VTF-15H MK2 | Monoprice Monolith M-215 | |
|---|---|---|
| Price | $1,499 | $2999.99 |
| Ranked | #50 of 110 in Large Home Subwoofers (Over 75 lbs) | #23 of 110 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 |
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Prices on this page were last checked September 23, 2026 at 11:24 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.
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The Two Speakers In Full
HSU Research VTF-15H MK2: $1,499 eBay
Pros: 15-inch ported driver delivers 121.8dB CEA-2010-A average from HSU Research’s long-running VTF series.
Cons: Ported enclosure prone to room modes at certain frequencies, mid-large 50 kg size, and $1499 price point.
Notes: Price includes shipping
Full HSU Research VTF-15H MK2 review and specifications →
| CEA-2010-A Average (40-80Hz) | 121.8 dB |
|---|---|
| Cabinet Color | black, wood |
| Country | United States |
| Dimensions | 24"H x 18"W x 26"D (609.6 x 457.2 x 660.4 mm) |
| Drivers | 15" (381mm) driver |
| Enclosure | ported, front |
| Measurement Source | Manufacturer |
| Output SPL at 15 Hz | 101.6 dB |
| Output SPL at 20 Hz | 108.4 dB |
| Output SPL at 25 Hz | 114.8 dB |
| Output SPL at 31.5 Hz | 119.4 dB |
| Output SPL at 40 Hz | 122.9 dB |
| Output SPL at 50 Hz | 122.5 dB |
| Output SPL at 63 Hz | 121.1 dB |
| Output SPL at 80 Hz | 120.5 dB |
| Warranty | 7/2(+3) |
| Weight | 110 lbs (49.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- Head-to-Head Comparisons
- HSU Research VTF-15H MK2 vs SVS PB-3000
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- HSU Research VTF-15H MK2 vs Rythmik FV15HP
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Monoprice Monolith M-215: $2999.99 Monoprice eBay
Pros: Independent CEA-2010 testing records 118.9 dB at 20 Hz and 125.9 dB through 40-80 Hz. The ported, front enclosure with 2x 15” (381mm) drivers has the headroom for demanding film bass in a large room.
Cons: The 1074.4H x 508.0W x 701.0D mm cabinet and 98.0 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.
Notes: Product # 38543
Full Monoprice Monolith M-215 review and specifications →
| CEA-2010-A Average (40-80Hz) | 125.9 dB |
|---|---|
| Cabinet Color | black |
| Country | United States |
| Dimensions | 42.3"H x 20"W x 27.6"D (1074.4 x 508.0 x 701.0 mm) |
| Drivers | 2x 15" (381mm) drivers |
| Enclosure | ported, front |
| Measurement Source | Brent Butterworth |
| Output SPL at 12.5 Hz | 103.9 dB |
| Output SPL at 15 Hz | 113.1 dB |
| Output SPL at 20 Hz | 118.9 dB |
| Output SPL at 25 Hz | 122.6 dB |
| Output SPL at 31.5 Hz | 125.2 dB |
| Output SPL at 40 Hz | 126.4 dB |
| Output SPL at 50 Hz | 126.1 dB |
| Output SPL at 63 Hz | 125.6 dB |
| Output SPL at 80 Hz | 125.6 dB |
| Output SPL at 100 Hz | 125.7 dB |
| Output SPL at 125 Hz | 126.3 dB |
| Warranty | 5 |
| Weight | 216.1 lbs (98.0 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Independently measured by Brent Butterworth; the published figures above come from this ASR subwoofer measurement thread.
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