Short answer: the HSU Research VTF-15H MK2 ranks #41 of 97 subwoofers at $1499; the XTZ Sound 99 W12S ranks #37 at $1499. Close enough in price that the ranking gap is the deciding factor.
What the HSU Research VTF-15H MK2 gets right: 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 size, and $1,500 price point.
On the XTZ Sound 99 W12S side: 12-inch ported with Bang & Olufsen ICEpower half-kilowatt amplification.
Buy the HSU Research VTF-15H MK2 if the price matters more than the ranking. Buy the XTZ Sound 99 W12S if the ranking matters more than the price.
Specifications Side By Side
| HSU Research VTF-15H MK2 | XTZ Sound 99 W12S | |
|---|---|---|
| Price | $1,499 | $1499 |
| Ranked | #41 of 97 in Large Powered Home Subwoofers (Over 75 lbs) | #37 of 137 in Medium Powered Home Subwoofers (30-75 lbs) |
| Enclosure | ported, front | ported, rear |
| Output SPL at 15 Hz | 101.6 dB | - |
| Output SPL at 20 Hz | 108.4 dB | 74.0 dB |
| Output SPL at 25 Hz | 114.8 dB | 86.5 dB |
| Output SPL at 31.5 Hz | 119.4 dB | 97.7 dB |
| Output SPL at 40 Hz | 122.9 dB | 108.3 dB |
| Output SPL at 50 Hz | 122.5 dB | 114.9 dB |
| Output SPL at 63 Hz | 121.1 dB | 117.3 dB |
| Output SPL at 80 Hz | 120.5 dB | 117.4 dB |
| CEA-2010-A Average (40-80Hz) | 121.8 dB | 114.5 dB |
| Dimensions | 24.0"H x 18.0"W x 26.0"D (609.6 x 457.2 x 660.4 mm) | 19.65"H x 13.77"W x 15.75"D (499.1 x 349.8 x 400.0 mm) |
| Weight | 110 lbs / 49.9 kg | 67.2 lbs / 30.5 kg |
| Warranty | 7/2(+3) | - |
| Cabinet Color | black, wood | - |
| Country | United States | Sweden |
| Measurement Source | Manufacturer | Ilkka Rissanen |
| Drivers | 15" (381mm) driver | 12" (305mm) driver |
| Frequency Response | - | Not fully specified |
| Power Output (Watts) | - | Not fully specified |
The Two Speakers In Full
HSU Research VTF-15H MK2: $1,499
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 $1,500 price point.
Notes: Price includes shipping
| CEA-2010-A Average (40-80Hz) | 121.8 dB |
|---|---|
| Cabinet Color | black, wood |
| Country | United States |
| Dimensions | 24.0"H x 18.0"W x 26.0"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 |
- Head-to-Head Comparisons
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- Links
XTZ Sound 99 W12S: $1499
Pros: 12-inch ported with Bang & Olufsen ICEpower half-kilowatt amplification. Sweepable phase knob with flexible EQ1/EQ2 switches for refined tuning. Excellent value high-output performance with powerful, clean amplification.
| CEA-2010-A Average (40-80Hz) | 114.5 dB |
|---|---|
| Country | Sweden |
| Dimensions | 19.65"H x 13.77"W x 15.75"D (499.1 x 349.8 x 400.0 mm) |
| Drivers | 12" (305mm) driver |
| Enclosure | ported, rear |
| Frequency Response | Not fully specified |
| Measurement Source | Ilkka Rissanen |
| Output SPL at 20 Hz | 74.0 dB |
| Output SPL at 25 Hz | 86.5 dB |
| Output SPL at 31.5 Hz | 97.7 dB |
| Output SPL at 40 Hz | 108.3 dB |
| Output SPL at 50 Hz | 114.9 dB |
| Output SPL at 63 Hz | 117.3 dB |
| Output SPL at 80 Hz | 117.4 dB |
| Power Output (Watts) | Not fully specified |
| Weight | 67.2 lbs / 30.5 kg |
- Head-to-Head Comparisons
- Links
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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.