Short answer: the Rythmik FV18. It ranks #60 of 143 subwoofers by sound quality, rated 4.2/5, at $2,670; the SVS SB17-Ultra R-Evolution ranks #102, rated 4.1/5, and costs $2,699, so there is little reason to consider the other one.
What the SVS SB17-Ultra R-Evolution does well: A flagship sealed 17 inch subwoofer with a very powerful amplifier, app control and automatic room calibration. The catch: No independent measurements yet, so its output can’t be compared with ranked subwoofers.
What the Rythmik FV18 does well: An 18 inch ported subwoofer with deep, powerful bass for large rooms and flexible balanced and RCA inputs. The catch: The 838.2H x 533.4W x 558.8D mm cabinet and 160.1 lbs (72.6 kg) mass make this a serious placement and moving commitment.
Buy the Rythmik FV18. It is rated higher for sound quality than the SVS SB17-Ultra R-Evolution and costs less, which makes it the one to get unless you need something the other one does better.
About the ratings: the SVS SB17-Ultra R-Evolution’s rating is estimated from measured siblings and predecessors rather than its own measurements, with a likely range of 3.9 to 4.3, so this verdict could change once it is measured.
Looking for alternatives? See the complete Subwoofers rankings.
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Specifications Side By Side
| SVS SB17-Ultra R-Evolution | Rythmik FV18 | |
|---|---|---|
| Price | $2,699.00 | $2,670 |
| Ranked | #102 of 143 in Large Home Subwoofers (Over 75 lbs) Estimated | #60 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Weight | 124 lbs (56.25 kg) | 160.1 lbs (72.6 kg) |
| Dimensions | 20”H x 19.5”W x 21.1”D (507 x 495 x 537 mm) | 33”H x 21”W x 22”D (838.2 x 533.4 x 558.8 mm) |
| Enclosure | sealed | ported, front |
| Drivers | 17” driver, dual 8” voice coils | 18” (457mm) driver |
| Amplifier Power | 2800W RMS | - |
| Frequency Response | 15Hz extension (manufacturer specified) | - |
| Cabinet Color | Piano Gloss Black, Black Oak Veneer | black |
| Country | United States | United States |
| Output SPL at 12.5 Hz | - | 102.0 dB |
| Output SPL at 15 Hz | - | 109.5 dB |
| Output SPL at 20 Hz | - | 114.3 dB |
| Output SPL at 25 Hz | - | 117.6 dB |
| Output SPL at 31.5 Hz | - | 119.2 dB |
| Output SPL at 40 Hz | - | 120.4 dB |
| Output SPL at 50 Hz | - | 121.3 dB |
| Output SPL at 63 Hz | - | 121.7 dB |
| Output SPL at 80 Hz | - | 121.9 dB |
| Output SPL at 100 Hz | - | 122.4 dB |
| Output SPL at 125 Hz | - | 121.9 dB |
| CEA-2010-A Average (40-80Hz) | - | 121.3 dB |
| Warranty | - | 5/3 |
| Measurement Source | - | Data-bass |
| 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 |
Where the Ratings Come From
- SVS SB17-Ultra R-Evolution: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
- Rythmik FV18: manufacturer specifications and listening comparisons; no independent measurement has been published yet.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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