Short answer: the Pro Audio Technology LFC-24sm. It ranks #4 of 143 subwoofers by sound quality (rated 4.6/5) at $10,000 and is still sold new; the JTR Speakers Captivator S2 ranks #9 (rated 4.5/5) and is discontinued, so it is only an option used.
What the JTR Speakers Captivator S2 does well: A tall sealed subwoofer with two 18 inch drivers and serious deep bass output for demanding movies in a large room. The tradeoff: The 1016.0H x 533.4W x 457.2D mm cabinet and 220 lbs (99.8 kg) mass make this a serious placement and moving commitment.
What the Pro Audio Technology LFC-24sm does well: A giant 24 inch ported subwoofer with enormous deep bass output, built for large dedicated cinema rooms. The catch: The 660.4H x 1536.7W x 533.4D mm cabinet and 266.1 lbs (120.7 kg) mass still need deliberate placement and calibration.
Buy the Pro Audio Technology LFC-24sm. It is rated higher for sound quality; the JTR Speakers Captivator S2 is no longer sold new.
Still deciding? The full Subwoofers rankings cover every ranked option.
A tall sealed subwoofer with two 18 inch drivers and serious deep bass output for demanding movies in a large room.
A giant 24 inch ported subwoofer with enormous deep bass output, built for large dedicated cinema rooms.
Prices on this page were last checked October 29, 2026 at 4:42 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 | Pro Audio Technology LFC-24sm | |
|---|---|---|
| Price | $3,995 Discontinued | $10,000 Passive |
| Ranked | #9 of 143 in Large Home Subwoofers (Over 75 lbs) | #4 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 | - |
| Output SPL at 15 Hz | 108.7 dB | - |
| Output SPL at 20 Hz | 115.1 dB | 123.7 dB |
| Output SPL at 25 Hz | 119.7 dB | 131.4 dB |
| Output SPL at 31.5 Hz | 124.8 dB | 133.6 dB |
| Output SPL at 40 Hz | 129.3 dB | 135.4 dB |
| Output SPL at 50 Hz | 130.3 dB | 136.0 dB |
| Output SPL at 63 Hz | 129.4 dB | 135.2 dB |
| Output SPL at 80 Hz | 128.5 dB | - |
| Output SPL at 100 Hz | 128.1 dB | - |
| Output SPL at 125 Hz | 128.0 dB | - |
| CEA-2010-A Average (40-80Hz) | 129.4 dB | 135.5 dB (avg of 3/4 bands) |
| Dimensions | 40”H x 21”W x 18”D (1016.0 x 533.4 x 457.2 mm) | 26”H x 60.5”W x 21”D (660.4 x 1536.7 x 533.4 mm) |
| Weight | 220 lbs (99.8 kg) | 266.1 lbs (120.7 kg) |
| Warranty | 5/3 | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Brent Butterworth |
| Drivers | 2x 18” (457mm) drivers | 24” (610mm) driver |
| Inputs | XLR (balanced), RCA | - |
| 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 | - |
| Passive | - | Yes |
| Cabinet Color | - | black |
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