JTR Speakers Captivator S2 vs Rythmik F18

Last updated: October 21, 2026

Short answer: the Rythmik F18, if you are buying new. The JTR Speakers Captivator S2 ranks higher than it (#9 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.

JTR Speakers Captivator S2 vs Rythmik F18

Buy the Rythmik F18, since the JTR Speakers Captivator S2 is discontinued and only worth hunting down used.

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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 F18
Price$3,995 Discontinued$2,344
Ranked#9 of 143 in Large Home Subwoofers (Over 75 lbs)#85 of 143 in Large Home Subwoofers (Over 75 lbs)
Enclosuresealedsealed
Output SPL at 10 Hz100.3 dB93.7 dB
Output SPL at 12.5 Hz103.3 dB97.4 dB
Output SPL at 15 Hz108.7 dB102.0 dB
Output SPL at 20 Hz115.1 dB106.2 dB
Output SPL at 25 Hz119.7 dB110.9 dB
Output SPL at 31.5 Hz124.8 dB114.3 dB
Output SPL at 40 Hz129.3 dB117.1 dB
Output SPL at 50 Hz130.3 dB119.1 dB
Output SPL at 63 Hz129.4 dB120.5 dB
Output SPL at 80 Hz128.5 dB121.2 dB
Output SPL at 100 Hz128.1 dB121.4 dB
Output SPL at 125 Hz128.0 dB121.4 dB
CEA-2010-A Average (40-80Hz)129.4 dB119.5 dB
Dimensions40”H x 21”W x 18”D (1016.0 x 533.4 x 457.2 mm)20.5”H x 20.5”W x 21”D (520.7 x 520.7 x 533.4 mm)
Weight220 lbs (99.8 kg)115.1 lbs (52.2 kg)
Warranty5/35/3
CountryUnited StatesUnited States
Measurement SourceData-bassData-bass
Drivers2x 18” (457mm) drivers18” (457mm) driver
InputsXLR (balanced), RCAXLR (2), RCA (line/LFE)
XLR InputYesYes
RCA InputYesYes
TRS InputNoNo
Optical InputNoNo
Coaxial InputNoNo
USB InputNoNo
HDMI InputNoNo
AES InputNoNo
Aux InputNoNo
Cabinet Color-black

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