The JTR Speakers Captivator 4000ULF is rated 4.5/5 for sound quality, #6 of 143 Large Home Subwoofers (Over 75 lbs). See all Subwoofers rankings for every top pick.
Prices on this page were last checked October 28, 2026 at 1:06 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.
Brand: JTR Speakers
#6 JTR Speakers Captivator 4000ULF: $5,699 each JTR Speakers $5,699 eBay
Pros: A massive dual 18 inch subwoofer with extremely deep, loud bass, for a large home theater. 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.
Is the JTR Speakers Captivator 4000ULF right for you?
Skip it if
- you need to move it often (120 kg each).
- you want the best value: the higher-rated JTR Speakers Orbit Shifter PRO costs about $1,200 less.
| 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
17 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 Power Sound Audio (PSA) T18
- 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 JTR Speakers Captivator 218PRO
- 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
- JTR Speakers Captivator 4000ULF vs Rythmik FV15HP
- JTR Speakers Captivator 4000ULF vs HSU Research VTF-15H MK2
- JTR Speakers Captivator 4000ULF vs HSU Research VTF-3 MK5 HP
- JTR Speakers Captivator 4000ULF vs SVS PB-4000
- JTR Speakers Captivator 4000ULF vs Monoprice Monolith M-15 V2
- JTR Speakers Captivator 4000ULF vs Rythmik F18
- JTR Speakers Captivator 4000ULF vs Monoprice Monolith M15-S
No comparisons match that search.