JTR Captivator 4000ULF-ST Subwoofer - Dreamedia AV
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JTR Captivator 4000ULF-ST Subwoofer
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JTR

JTR Captivator 4000ULF-ST Subwoofer

JTR

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$5,899.00

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877-417-9000 Hannah

Description

JTR Captivator 4000ULF-ST is a bass-reflex subwoofer with dual 18-inch drivers and a 4000 W DSP-controlled amplifier designed for very deep, controlled low-end output. Built with a tall, braced Baltic birch cabinet and front-firing design, it delivers strong, clean bass pressure for serious home theater and music systems.

Estimated Lead Time

4 to 6 weeks

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JTR Captivator 4000ULF-ST Subwoofer

$5,899.00

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Description

Built for Bass That Doesn’t Back Off

If you want low end that shows up and stays solid, the Captivator 4000ULF-ST is built for that job. With dual 18-inch drivers in a tall, low-tuned bass-reflex cabinet, it delivers deep pressure that hits right away and keeps going when scenes get heavy.

Power That Holds Together

A 4000 W RMS DSP-controlled amplifier gives you the headroom to push without sag. The large slot port keeps airflow clean, so output stays strong instead of compressed. You get depth and punch together, not boom.

Heavy Build, Easy to Dial In

The cabinet is thick Baltic birch with heavy bracing, keeping vibration 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

  • Tall cabinet for stronger low-frequency reach

  • 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 +/- 3db10.5-125hz
Amplifier4000 watts RMS
Dimensions (HxWxD)28″ x 58″ x 20.5″ (HxWxD)
Shipping Weight (Less Pallet)265 lbs
Construction18mm, 13ply, void free, Baltic Birch (several times stronger and more expensive than MDF)
Exterior FinishMatte Black Paint
ConnectorsRCA and XLR
Warranty5 year Manufacturer defect (amplifier 3 year)

Punch Where It Matters

The dual 18″ drivers and powerful Class-D amplifier give this subroom pressure that shows up in deep scenes and heavy bass passages. It’s not just loud — it stays clean and controlled, even when you push levels.

Low Tuning Means Reach

Because the cabinet is bass-reflex tuned to around 10 Hz and uses a large slot port, the 4000ULF-ST digs deeper than most ported designs without choking. That gives you usable output in the lowest audible frequencies.

Practical Build and Setup

The Baltic birch enclosure stays quiet under load, and the front-firing layout makes placement less of a puzzle. With balanced inputs, trigger support, and LF Adjust, you get control over how it fits into your system without guesswork

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Kevin Flynn
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Kevin Flynn
Michael Kamm
"I am very happy with the services that I received from Dreamedia. These guys..." ... click to read more
★★★★★
Michael Kamm
Luke Evans
"Fantastic prices and customer service. I would definitely recommend giving them a call!"
★★★★★
Luke Evans
L Phillips
"I recently bought a Epson projector and Dragonfly screen from Zach at Dreamedia and cannot..." ... click to read more
★★★★★
L Phillips
Amy Miller
"Very knowledgeable and helpful! Would highly recommend"
★★★★★
Amy Miller
Jacob Cuellar
"I been following Dreamedia on YouTube for while now Zach audio installed video really..." ... click to read more
★★★★★
Jacob Cuellar
Bretnea Harvey
"Kellen is trustworthy and I have no doubt this is the best stop for your..." ... click to read more
★★★★★
Bretnea Harvey
BJ Broderick
"I’ve followed Dreamedia on YouTube for many years and have also had family members buy..." ... click to read more
★★★★★
BJ Broderick
Jeremy McCurdy
"Best in the business! While researching home theater equipment and options, I watched all of..." ... click to read more
★★★★★
Jeremy McCurdy
Peter Eichen
"Excellent experience with Zach! I ordered a projector and mount based on his recommendations...." ... click to read more
★★★★★
Peter Eichen
C dawg swizzle
"Bought a complete home system including a 75” QLED TV. Zach and his brother..." ... click to read more
★★★★★
C dawg swizzle
Mike H
"Answered and recommended Focal in wall speakers for my media room setup."
★★★★★
Mike H
Kevin Flynn
"I’ve been an avid Projector user for 25 years. I’m on my 3rd JVC PROJECTOR..." ... click to read more
★★★★★
Kevin Flynn
Michael Kamm
"I am very happy with the services that I received from Dreamedia. These guys..." ... click to read more
★★★★★
Michael Kamm
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Depending on location, there is a good chance one of our preferred partners can do the installation. We have over 20+ installers in our network across the country.