Short answer: the Rythmik F18, if you are buying new. The Harbinger V2218S ranks higher than it (#15 vs #85 of 143 subwoofers, 4.5/5 vs 4.1/5) but is discontinued, so only consider it used; the Rythmik F18 is still sold new at $2,344.
Why pick the Rythmik F18: 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.
The Harbinger V2218S is the better-sounding choice. A pro style 18 inch ported subwoofer with hard hitting upper bass for movie effects and music, relatively light for its output. The tradeoff: 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 new; the Harbinger V2218S is no longer sold new, so it only makes sense as a used find.
Still deciding? The full Subwoofers rankings cover every ranked option.
A massive sealed 18 inch subwoofer with tight, powerful bass and balanced XLR inputs, built for big home theaters.
A pro style 18 inch ported subwoofer with hard hitting upper bass for movie effects and music, relatively light for its output.
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Specifications Side By Side
| Rythmik F18 | Harbinger V2218S | |
|---|---|---|
| Price | $2,344 | $3,495 Discontinued |
| Ranked | #85 of 143 in Large Home Subwoofers (Over 75 lbs) | #15 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, front |
| 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 | - |
| Output SPL at 20 Hz | 106.2 dB | 81.7 dB |
| Output SPL at 25 Hz | 110.9 dB | 99.7 dB |
| Output SPL at 31.5 Hz | 114.3 dB | 118.0 dB |
| Output SPL at 40 Hz | 117.1 dB | 122.8 dB |
| Output SPL at 50 Hz | 119.1 dB | 129.0 dB |
| Output SPL at 63 Hz | 120.5 dB | 132.2 dB |
| Output SPL at 80 Hz | 121.2 dB | 131.7 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 | 128.9 dB |
| Dimensions | 20.5”H x 20.5”W x 21”D (520.7 x 520.7 x 533.4 mm) | 32.5”H x 26.5”W x 29.7”D (825.5 x 673.1 x 754.4 mm) |
| Weight | 115.1 lbs (52.2 kg) | 89.9 lbs (40.8 kg) |
| Warranty | 5/3 | - |
| Cabinet Color | black | black |
| Country | United States | United States |
| Measurement Source | Data-bass | Brent Butterworth |
| Drivers | 18” (457mm) driver | 18” (457mm) 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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