JTR Speakers Captivator S2 vs Rythmik F18

Short answer: the JTR Speakers Captivator S2 for the higher ranking, the Rythmik F18 for the lower price. The JTR Speakers Captivator S2 ranks #7 of 97 subwoofers at $3995. The Rythmik F18 ranks #60 at $1850, $2145 cheaper.

Buy the JTR Speakers Captivator S2 if the ranking matters more than the price. Buy the Rythmik F18 if the price matters more than the ranking.

Specifications Side By Side

The Two Speakers In Full

JTR Speakers Captivator S2: $3995

Notes: Replaced by “RS2”

CEA-2010-A Average (40-80Hz)	129.4 dB
Country	United States
Dimensions	40.0"H x 21.0"W x 18.0"D (1016.0 x 533.4 x 457.2 mm)
Drivers	2x 18" (457mm) drivers
Enclosure	sealed
Measurement Source	Data-bass
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
Output SPL at 25 Hz	119.7 dB
Output SPL at 31.5 Hz	124.8 dB
Output SPL at 40 Hz	129.3 dB
Output SPL at 50 Hz	130.3 dB
Output SPL at 63 Hz	129.4 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
Warranty	5/3
Weight	220 lbs / 99.8 kg

• Head-to-Head Comparisons
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  • See all 17 comparisons
• Links
  • JTR Speakers Captivator S2 Website
  • Reddit Search for JTR Speakers Captivator S2
  • Direct Speakerranking Link

Rythmik F18: $1,850

CEA-2010-A Average (40-80Hz)	119.5 dB
Cabinet Color	black
Country	United States
Dimensions	20.5"H x 20.5"W x 21.0"D (520.7 x 520.7 x 533.4 mm)
Drivers	18" (457mm) driver
Enclosure	sealed
Measurement Source	Data-bass
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
Output SPL at 25 Hz	110.9 dB
Output SPL at 31.5 Hz	114.3 dB
Output SPL at 40 Hz	117.1 dB
Output SPL at 50 Hz	119.1 dB
Output SPL at 63 Hz	120.5 dB
Output SPL at 80 Hz	121.2 dB
Output SPL at 100 Hz	121.4 dB
Output SPL at 125 Hz	121.4 dB
Warranty	5/3
Weight	115.1 lbs / 52.2 kg

• Head-to-Head Comparisons
  • Rythmik F18 vs Monoprice Monolith M15-S
  • Rythmik F18 vs Monoprice Monolith M-15 V2
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  • Rythmik F18 vs HSU Research VTF-15H MK2
  • Rythmik F18 vs Rythmik FV15HP
  • Rythmik F18 vs Monoprice Monolith M-215
  • Rythmik F18 vs Reaction Audio PV-15X
  • See all 13 comparisons
• Links
  • Rythmik F18 Website
  • Reddit Search for Rythmik F18
  • Direct Speakerranking Link

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Product prices and availability were last checked August 9, 2026 at 6:57 AM UTC 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.