Systems ListJTR SpeakersCaptivator 4000-ULF

ManufactureJTR Speakers
System typeVented
Driver Size18 "
Number of drivers2
External volume19.21 ft3
Dimentions (Width Height Depth)41 " 20.5 " 39.5 "
Weight265 lbs
Native Tuning Frequency10 Hz
Power4000 W
Aprox. Price$3199 USD


JTR Speakers newest and largest dreadnaught of a subwoofer is the Captivator 4000-ULF. This hulking sub combines: Two high excursion 18" drivers ,each weighing 60lbs or more, a 4000w Speakerpower Torpedo plate amplifier and a 10Hz tuned vented cab, measuring a full 41x40x20.5", into one manly 265lb bass maker. Unsurprisingly the $3199+shipping, Captivator 4000-ULF, rates about a -1 on the WAF scale. However it makes up for that by producing a ton of bass down all of the way down to 10Hz. The rest of the design and build details are per usual with JTR Speakers...Matte black finish (premiums available for an upcharge), made and sourced in the USA, void free Baltic birch construction, extensive bracing and efficient, yet powerful, dsp enabled amplification. The Captivator 4000-ULF is one of the most powerful subs that have come across the test bench and should be an excellent option for those on the market for an uber sub or two for a large dedicated space.