Short answer: both are discontinued, and they are rated the same for sound quality (#57 and #69 of 143 subwoofers). Either one is only an option used, so choose on condition and price. If you want one new, the SVS PB-5000 R-Evolution replaces the SVS PB-4000 and is rated 4.2/5 at $2,399.

Buy the HSU Research VTF-15H MK2 or the SVS PB-4000, whichever you find used in better condition; both are discontinued. For a new speaker, buy the SVS PB-5000 R-Evolution, which replaces the SVS PB-4000.
Want more options? Browse the full Subwoofers rankings.
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Specifications Side By Side
| HSU Research VTF-15H MK2 | SVS PB-4000 | |
|---|---|---|
| Price | $1,499 Discontinued | $2,158.97 Discontinued |
| Ranked | #57 of 143 in Large Home Subwoofers (Over 75 lbs) | #69 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | ported, front |
| Output SPL at 15 Hz | 101.6 dB | 102.1 dB |
| Output SPL at 20 Hz | 108.4 dB | 115.3 dB |
| Output SPL at 25 Hz | 114.8 dB | 116.3 dB |
| Output SPL at 31.5 Hz | 119.4 dB | 117.8 dB |
| Output SPL at 40 Hz | 122.9 dB | 119.8 dB |
| Output SPL at 50 Hz | 122.5 dB | 121.7 dB |
| Output SPL at 63 Hz | 121.1 dB | 120.7 dB |
| Output SPL at 80 Hz | 120.5 dB | 119.2 dB |
| CEA-2010-A Average (40-80Hz) | 121.8 dB | 120.3 dB |
| Dimensions | 24”H x 18”W x 26”D (609.6 x 457.2 x 660.4 mm) | 23.4”H x 20.5”W x 27.7”D (594.4 x 520.7 x 703.6 mm) |
| Weight | 110 lbs (49.9 kg) | 153.2 lbs (69.5 kg) |
| Warranty | 7/2(+3) | 5 |
| Cabinet Color | black, wood | black |
| Country | United States | United States |
| Measurement Source | Manufacturer | Audioholics |
| Drivers | 15” (381mm) driver | 13.5” (343mm) driver with ported design |
| Output SPL at 100 Hz | - | 118.1 dB |
| Output SPL at 125 Hz | - | 117.5 dB |
| Inputs | - | XLR (balanced), RCA (LFE/stereo) |
| XLR Input | - | Yes |
| RCA Input | - | Yes |
| TRS Input | - | No |
| Optical Input | - | No |
| Coaxial Input | - | No |
| USB Input | - | No |
| HDMI Input | - | No |
| AES Input | - | No |
| Aux Input | - | No |
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