Short answer: the Power Sound Audio (PSA) T18. Both are rated 4.5/5 for sound quality (#8 and #6 of 110 subwoofers), and the Power Sound Audio (PSA) T18 costs $4995 against $5699 for the JTR Speakers Captivator 4000ULF, with sound quality a draw, the lower price decides it.
Buy the Power Sound Audio (PSA) T18. Both are rated the same for sound quality, and it costs $704 less than the JTR Speakers Captivator 4000ULF.
Still deciding? The full Subwoofers rankings cover every ranked option.
Specifications Side By Side
| JTR Speakers Captivator 4000ULF | Power Sound Audio (PSA) T18 | |
|---|---|---|
| Price | $5,000 | $4995 |
| Ranked | #6 of 110 in Large Home Subwoofers (Over 75 lbs) | #8 of 110 in Large Home Subwoofers (Over 75 lbs) |
| Enclosure | ported, front | sealed |
| 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 | 115.7 dB |
| Output SPL at 25 Hz | 126.1 dB | 115.7 dB |
| Output SPL at 31.5 Hz | 129.3 dB | 115.7 dB |
| Output SPL at 40 Hz | 130.7 dB | 129.7 dB |
| Output SPL at 50 Hz | 131.2 dB | 129.7 dB |
| Output SPL at 63 Hz | 130.9 dB | 129.7 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 | - |
| CEA-2010-A Average (40-80Hz) | 130.8 dB | 129.7 dB (avg of 3/4 bands) |
| Dimensions | 41"H x 20.5"W x 39.5"D (1041.4 x 520.7 x 1003.3 mm) | 23.5"H x 31"W x 27.5"D (596.9 x 787.4 x 698.5 mm) |
| Weight | 265 lbs (120.2 kg) | 170 lbs (77.1 kg) |
| Warranty | 5/3 | 5 |
| Cabinet Color | black, custom | - |
| Country | United States | United States |
| Measurement Source | Data-bass | Manufacturer |
| Drivers | 2x 18" (457mm) driver | 18" (457mm) driver |
| Inputs | XLR, RCA | XLR (balanced, with loop output), RCA |
| XLR Input | Yes | Yes |
| RCA Input | Yes | Yes |
| TRS Input | No | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
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- JTR Speakers Captivator 4000ULF vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator 215PRO vs JTR Speakers Captivator 4000ULF
- JTR Speakers Captivator 4000ULF vs JTR Speakers Captivator S2
Prices on this page were last checked September 23, 2026 at 11:24 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 JTR Speakers 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 →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 130.8 dB |
| Cabinet Color | black, custom |
| Coaxial Input | No |
| 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 |
| HDMI Input | No |
| Inputs | XLR, RCA |
| Measurement Source | Data-bass |
| Optical Input | No |
| 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 |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5/3 |
| Weight | 265 lbs (120.2 kg) |
| XLR Input | Yes |
- Links
- 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 4000ULF vs JTR Speakers Captivator 215PRO
- JTR Speakers Captivator 4000ULF vs Power Sound Audio (PSA) TRIAX
- JTR Speakers Captivator 4000ULF vs JTR Speakers Captivator S2
- JTR Speakers Captivator 4000ULF vs JTR Speakers Orbit Shifter LFU
- JTR Speakers Captivator 4000ULF vs JTR Speakers Orbit Shifter PRO
- JTR Speakers Captivator 4000ULF vs Monoprice Monolith 16 THX Ultra
- JTR Speakers Captivator 4000ULF vs Reaction Audio PV-15X
- JTR Speakers Captivator 4000ULF vs Monoprice Monolith M-215
- See all 15 comparisons
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 →
| AES Input | No |
|---|---|
| Aux Input | No |
| CEA-2010-A Average (40-80Hz) | 129.7 dB (avg of 3/4 bands) |
| Coaxial Input | No |
| 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 |
| HDMI Input | No |
| Inputs | XLR (balanced, with loop output), RCA |
| Measurement Source | Manufacturer |
| Optical Input | No |
| 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 |
| RCA Input | Yes |
| TRS Input | No |
| USB Input | No |
| Warranty | 5 |
| Weight | 170 lbs (77.1 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- These figures are manufacturer-specified rather than independently measured.
- 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
- Power Sound Audio (PSA) T18 vs Monoprice Monolith 16 THX Ultra
- Power Sound Audio (PSA) T18 vs HSU Research VTF-3 MK5 HP