Short answer: the Rythmik FV15HP, if you are buying new. The JTR Speakers Captivator S2 ranks higher than it (#9 vs #55 of 143 subwoofers, 4.5/5 vs 4.2/5) but is discontinued, so only consider it used; the Rythmik FV15HP is still sold new at $2,127.
Buy the Rythmik FV15HP, since the JTR Speakers Captivator S2 is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Subwoofers rankings.
Prices on this page were last checked November 7, 2026 at 7:34 PM UTC. Product prices and availability are accurate as of that date/time 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.
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Specifications Side By Side
| JTR Speakers Captivator S2 | Rythmik FV15HP | |
|---|---|---|
| Price | $3,995 Discontinued | $2,127 |
| Ranked | #9 of 143 in Large Home Subwoofers (Over 75 lbs) | #55 of 143 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | sealed | ported, front |
| Output SPL at 10 Hz | 100.3 dB | - |
| Output SPL at 12.5 Hz | 103.3 dB | 92.8 dB |
| Output SPL at 15 Hz | 108.7 dB | 105.1 dB |
| Output SPL at 20 Hz | 115.1 dB | 111.1 dB |
| Output SPL at 25 Hz | 119.7 dB | 116.1 dB |
| Output SPL at 31.5 Hz | 124.8 dB | 120.0 dB |
| Output SPL at 40 Hz | 129.3 dB | 122.5 dB |
| Output SPL at 50 Hz | 130.3 dB | 122.1 dB |
| Output SPL at 63 Hz | 129.4 dB | 121.8 dB |
| Output SPL at 80 Hz | 128.5 dB | 121.4 dB |
| Output SPL at 100 Hz | 128.1 dB | 121.2 dB |
| Output SPL at 125 Hz | 128.0 dB | 121.1 dB |
| CEA-2010-A Average (40-80Hz) | 129.4 dB | 122.0 dB |
| Dimensions | 40”H x 21”W x 18”D (1016.0 x 533.4 x 457.2 mm) | 24.5”H x 18.2”W x 24.2”D (622.3 x 463.5 x 615.9 mm) |
| Weight | 220 lbs (99.8 kg) | 115.1 lbs (52.2 kg) |
| Warranty | 5/3 | 5/3 |
| Country | United States | United States |
| Measurement Source | Data-bass | Audioholics |
| Drivers | 2x 18” (457mm) drivers | 15” (381mm) driver |
| Inputs | XLR (balanced), RCA | XLR (2), RCA (line/LFE) |
| XLR Input | Yes | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| Cabinet Color | - | black, white |
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