JTR Speakers Captivator S2 vs REL Acoustics HT/1510 Predator II

Short answer: the JTR Speakers Captivator S2 for better sound quality, the REL Acoustics HT/1510 Predator II for the lower price. The JTR Speakers Captivator S2 ranks #9 of 110 subwoofers at $3995. The REL Acoustics HT/1510 Predator II ranks #82 at $2526.62, $1468.38 cheaper.

What the JTR Speakers Captivator S2 offers: Independent CEA-2010 testing records 115.1 dB at 20 Hz and 129.4 dB through 40-80 Hz. The sealed enclosure with 2x 18” (457mm) drivers has the headroom for demanding film bass in a large room. Watch for: The 1016.0H x 533.4W x 457.2D mm cabinet and 99.8 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

What the REL Acoustics HT/1510 Predator II offers: Independent CEA-2010 testing records 98.0 dB at 20 Hz and 118.1 dB through 40-80 Hz. The sealed enclosure with 15” (381mm) driver delivers substantial upper-bass output for movie effects and music. Watch for: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 457.2H x 541.0W x 492.8D mm cabinet and 45.2 kg mass still require deliberate placement and calibration.

Buy the JTR Speakers Captivator S2 when sound quality outweighs the price for you, and the REL Acoustics HT/1510 Predator II when the price outweighs sound quality instead.

Want more options? Browse the full Subwoofers rankings.

Specifications Side By Side

Related Speaker Comparisons

More top alternatives to JTR Speakers Captivator S2:

• JTR Speakers Captivator S2 vs JTR Speakers Orbit Shifter PRO
• JTR Speakers Captivator S2 vs JTR Speakers Orbit Shifter LFU
• JTR Speakers Captivator S2 vs WW Speaker Cabinets X21 - B&C 21DS115-4
• JTR Speakers Captivator S2 vs Pro Audio Technology LFC-24sm
• JTR Speakers Captivator S2 vs Power Sound Audio (PSA) TRIAX

Prices on this page were last checked September 16, 2026 at 12:41 AM 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.

As an eBay Partner, we may be compensated if you make a purchase.

The Two Speakers In Full

JTR Speakers Captivator S2: $3995 eBay

Pros: Independent CEA-2010 testing records 115.1 dB at 20 Hz and 129.4 dB through 40-80 Hz. The sealed enclosure with 2x 18” (457mm) drivers has the headroom for demanding film bass in a large room.

Cons: The 1016.0H x 533.4W x 457.2D mm cabinet and 99.8 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

Notes: Replaced by “RS2”

Full JTR Speakers Captivator S2 review and specifications →

CEA-2010-A Average (40-80Hz)	129.4 dB
Country	United States
Dimensions	40"H x 21"W x 18"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)

• Links
  • JTR Speakers Captivator S2 Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Data-bass; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • JTR Speakers Captivator S2 vs Power Sound Audio (PSA) T18
  • JTR Speakers Captivator S2 vs Power Sound Audio (PSA) V3600I
  • JTR Speakers Captivator S2 vs Funk Audio Ultra 24.0
  • JTR Speakers Captivator S2 vs JTR Speakers Captivator 215PRO
  • JTR Speakers Captivator S2 vs JTR Speakers Captivator 4000ULF
  • JTR Speakers Captivator S2 vs Funk Audio Custom 21.0
  • JTR Speakers Captivator S2 vs Power Sound Audio (PSA) TRIAX
  • JTR Speakers Captivator S2 vs JTR Speakers Growler (2015)
  • See all 48 comparisons

REL Acoustics HT/1510 Predator II: $2,526.62 eBay

Pros: Independent CEA-2010 testing records 98.0 dB at 20 Hz and 118.1 dB through 40-80 Hz. The sealed enclosure with 15” (381mm) driver delivers substantial upper-bass output for movie effects and music.

Cons: Deep-bass output is more limited than the strong 40-80 Hz result suggests, so it is not the right choice when the lowest movie effects are the priority. The 457.2H x 541.0W x 492.8D mm cabinet and 45.2 kg mass still require deliberate placement and calibration.

Full REL Acoustics HT/1510 Predator II review and specifications →

CEA-2010-A Average (40-80Hz)	118.1 dB
Cabinet Color	black
Country	United Kingdom
Dimensions	18"H x 21.3"W x 19.4"D (457.2 x 541.0 x 492.8 mm)
Drivers	15" (381mm) driver
Enclosure	sealed
Measurement Source	Audioholics
Output SPL at 15 Hz	91.4 dB
Output SPL at 20 Hz	98.0 dB
Output SPL at 25 Hz	104.4 dB
Output SPL at 31.5 Hz	111.1 dB
Output SPL at 40 Hz	116.9 dB
Output SPL at 50 Hz	118.5 dB
Output SPL at 63 Hz	118.5 dB
Output SPL at 80 Hz	118.4 dB
Output SPL at 100 Hz	118.5 dB
Output SPL at 125 Hz	118.0 dB
Warranty	3
Weight	99.6 lbs (45.2 kg)

• Links
  • REL Acoustics HT/1510 Predator II Website
• Reviews, Comparisons and Sound Samples
  • Independently measured by Audioholics; the published figures above come from this ASR subwoofer measurement thread.
• Head-to-Head Comparisons
  • REL Acoustics HT/1510 Predator II vs Outlaw Audio Ultra-X13
  • REL Acoustics HT/1510 Predator II vs SVS PB12-Plus
  • REL Acoustics HT/1510 Predator II vs HSU Research VTF-3 MK5 HP
  • REL Acoustics HT/1510 Predator II vs Monoprice Monolith 16 THX Ultra