Description

Built for the Lowest Notes That Matter

If you want bass that shows up when most subs fall off, the Captivator 4000ULF is built for that job. With dual 18-inch drivers in a low-tuned bass-reflex cabinet, it delivers real weight down where sound turns physical. It hits hard, stays composed, and doesn’t blur when scenes get heavy.

Power That Keeps Its Grip

A 4000 W RMS DSP-controlled amplifier gives you the headroom to push without sag. The huge slot port keeps airflow clean so output stays strong instead of compressed. You get deep pressure with control, not boom.

Heavy Build, Easy to Dial In

The cabinet is thick Baltic birch with heavy bracing, so vibration stays out of the picture. Everything fires forward for flexible placement. With XLR and RCA inputs, auto turn-on, trigger support, and LF adjust, setup is straightforward and predictable.

Key Features

Dual 18-inch high-excursion drivers
4000 W RMS Class-D amplifier with DSP
Bass-reflex design tuned for very deep output
Strong in-room performance into single digits
Large slot port to reduce turbulence
Front-firing cabinet for flexible placement
Balanced XLR and RCA connectivity
Heavy Baltic birch cabinet construction

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Specifications
Frequency +/- 3db	10.5-125hz
Amplifier	4000 watts RMS
Dimensions (HxWxD)	41″ x 20.5″ x 39.5″ (HxWxD), only 20.5″ deep sideways
Shipping Weight (Less Pallet)	265 lbs
Construction	18mm, 13ply, void free, Baltic Birch (several times stronger and more expensive than MDF)
Exterior Finish	Matte Black Paint
Connectors	RCA and XLR
Warranty	5 year Manufacturer defect (amplifier 3 year)

Sub-10 Hz Output That Shows Up

This sub goes deeper than most for real infrasonic output that you feel, not just hear. The dual eighteen-inch design and low tune point let it move serious air below 20 Hz without flopping around.

DSP Keeps It Practical

The built-in DSP with auto input and low noise floor keeps response clean and consistent. Even when you’re pushing big levels, you don’t get the distortion or harshness some big subs show.

Built to Fit Real Systems

With its heavy cabinet, front-firing layout, and multiple input options, the 4000ULF integrates into real theaters without a lot of guesswork. It stays quietly out of the way while delivering the kind of low-end power that changes the way a room feels.