JTR Speakers Captivator 4000ULF vs Power Sound Audio (PSA) T18

Short answer: the JTR Speakers Captivator 4000ULF on measured sound quality, the Power Sound Audio (PSA) T18 on price. The JTR Speakers Captivator 4000ULF ranks #4 of 97 subwoofers at $5000. The Power Sound Audio (PSA) T18 ranks #6 at $4995, $5 cheaper.

Buy the JTR Speakers Captivator 4000ULF if sound quality matters more than the price. Buy the Power Sound Audio (PSA) T18 if the price matters more than sound quality.

Specifications Side By Side

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Prices on this page were last checked September 8, 2026 at 6:02 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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The Two Speakers In Full

JTR Speakers Captivator 4000ULF: $5,000 eBay

Pros: Independent CEA-2010 testing records 122.3 dB at 20 Hz and 130.8 dB through 40-80 Hz. The ported, front enclosure with 2x 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 1041.4H x 520.7W x 1003.3D mm cabinet and 120.2 kg mass make this a serious placement and moving commitment. Ported output does not solve room modes, so careful placement and calibration remain essential.

Full JTR Speakers Captivator 4000ULF review and specifications →

CEA-2010-A Average (40-80Hz)	130.8 dB
Cabinet Color	black, custom
Country	United States
Dimensions	41"H x 20.5"W x 39.5"D (1041.4 x 520.7 x 1003.3 mm)
Drivers	2x 18" (457mm) driver
Enclosure	ported, front
Measurement Source	Data-bass
Output SPL at 10 Hz	111.0 dB
Output SPL at 12.5 Hz	115.3 dB
Output SPL at 15 Hz	119.3 dB
Output SPL at 20 Hz	122.3 dB
Output SPL at 25 Hz	126.1 dB
Output SPL at 31.5 Hz	129.3 dB
Output SPL at 40 Hz	130.7 dB
Output SPL at 50 Hz	131.2 dB
Output SPL at 63 Hz	130.9 dB
Output SPL at 80 Hz	130.6 dB
Output SPL at 100 Hz	130.5 dB
Output SPL at 125 Hz	129.5 dB
Warranty	5/3
Weight	265 lbs / 120.2 kg

• Links
  • JTR Speakers Captivator 4000ULF Website
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  • JTR Speakers Captivator 4000ULF vs JTR Speakers Orbit Shifter PRO
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Power Sound Audio (PSA) T18: $4995 eBay

Pros: Published CEA-2010 specifications list 115.7 dB at 20 Hz and 129.7 dB (avg of 3/4 bands) through 40-80 Hz. The sealed enclosure with 18” (457mm) driver has the headroom for demanding film bass in a large room.

Cons: The 596.9H x 787.4W x 698.5D mm cabinet and 77.1 kg mass make this a serious placement and moving commitment. A sealed cabinet still needs careful placement and calibration to avoid room-mode peaks.

Full Power Sound Audio (PSA) T18 review and specifications →

CEA-2010-A Average (40-80Hz)	129.7 dB (avg of 3/4 bands)
Country	United States
Dimensions	23.5"H x 31"W x 27.5"D (596.9 x 787.4 x 698.5 mm)
Drivers	18" (457mm) driver
Enclosure	sealed
Measurement Source	Manufacturer
Output SPL at 20 Hz	115.7 dB
Output SPL at 25 Hz	115.7 dB
Output SPL at 31.5 Hz	115.7 dB
Output SPL at 40 Hz	129.7 dB
Output SPL at 50 Hz	129.7 dB
Output SPL at 63 Hz	129.7 dB
Warranty	5
Weight	170 lbs / 77.1 kg

• Links
  • Power Sound Audio (PSA) T18 Website
• Reviews, Comparisons and Sound Samples
• Head-to-Head Comparisons
  • Power Sound Audio (PSA) T18 vs JTR Speakers Captivator 215PRO
  • Power Sound Audio (PSA) T18 vs JTR Speakers Captivator S2
  • Power Sound Audio (PSA) T18 vs Power Sound Audio (PSA) V3600I