Short answer: the Rythmik F18. It ranks #85 of 143 subwoofers by sound quality (rated 4.1/5) at $2,344 and is still sold new; the HSU Research VTF-3 MK3 ranks #130 (rated 3.7/5) and is discontinued, so it is only an option used. The HSU Research VTF-3 MK3’s replacement, the HSU Research VTF-3 MK5 HP, is rated 4.2/5 at $1,049.
The Rythmik F18 is the better-sounding option. A massive sealed 18 inch subwoofer with tight, powerful bass and balanced XLR inputs, built for big home theaters. Watch for: The 520.7H x 520.7W x 533.4D mm cabinet and 115.1 lbs (52.2 kg) mass make this a serious placement and moving commitment.
What the HSU Research VTF-3 MK3 does well: A rear ported 12 inch subwoofer with useful deep bass output for its size, now discontinued. Watch for: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority.
Buy the Rythmik F18. It is rated higher for sound quality, and the HSU Research VTF-3 MK3 is discontinued, so it is only available used.
Looking for alternatives? See the complete Subwoofers rankings.
A massive sealed 18 inch subwoofer with tight, powerful bass and balanced XLR inputs, built for big home theaters.
A rear ported 12 inch subwoofer with useful deep bass output for its size, now discontinued.
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Specifications Side By Side
| Rythmik F18 | HSU Research VTF-3 MK3 | |
|---|---|---|
| Price | $2,344 | $1,499 Discontinued |
| Ranked | #85 of 143 in Large Home Subwoofers (Over 75 lbs) | #130 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, rear |
| Output SPL at 10 Hz | 93.7 dB | - |
| Output SPL at 12.5 Hz | 97.4 dB | - |
| Output SPL at 15 Hz | 102.0 dB | 88.5 dB |
| Output SPL at 20 Hz | 106.2 dB | 104.3 dB |
| Output SPL at 25 Hz | 110.9 dB | 108.7 dB |
| Output SPL at 31.5 Hz | 114.3 dB | 109.7 dB |
| Output SPL at 40 Hz | 117.1 dB | 112.1 dB |
| Output SPL at 50 Hz | 119.1 dB | 113.7 dB |
| Output SPL at 63 Hz | 120.5 dB | 114.0 dB |
| Output SPL at 80 Hz | 121.2 dB | 114.0 dB |
| Output SPL at 100 Hz | 121.4 dB | - |
| Output SPL at 125 Hz | 121.4 dB | - |
| CEA-2010-A Average (40-80Hz) | 119.5 dB | 113.5 dB |
| Dimensions | 20.5”H x 20.5”W x 21”D (520.7 x 520.7 x 533.4 mm) | 21.5”H x 17”W x 25”D (546.1 x 431.8 x 635.0 mm) |
| Weight | 115.1 lbs (52.2 kg) | 89.9 lbs (40.8 kg) |
| Warranty | 5/3 | 7/2 |
| Cabinet Color | black | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Ilkka Rissanen |
| Drivers | 18” (457mm) driver | 12” (305mm) driver |
| Inputs | XLR (2), RCA (line/LFE) | - |
| 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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