JTR Captivator 4000ULF-ST Subwoofer - Dreamedia AV
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Dreamedia AV
Dual-driver subwoofer designed for high-performance audio in home theater systems, delivering deep, immersive sound quality.
Dual-driver subwoofer designed for high-performance audio in home theater systems, delivering deep, immersive sound quality.
Back panel of a home theater subwoofer showing input connections and settings for optimal audio performance.
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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Lucas Henry
"Can’t go wrong with Dreamedia!"
★★★★★
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Joseph Weatherly
"Great experience ordering a Stewart Firehawk G5 screen for my basement theater room from Dreamedia!..." ... click to read more
★★★★★
Joseph Weatherly
Michael Brewington
"Good, Honest, Professional, People. They are the sort of people you "Dream" of working..." ... click to read more
★★★★★
Michael Brewington
Tim Thompson
"I first discovered Dreammedia on YouTube when I was researching media equipment and how to..." ... click to read more
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Tim Thompson
Jason Doty
"Zach and Grayson went above and beyond on our large project. They were very..." ... click to read more
★★★★★
Jason Doty
Martin
"I ordered my end game movie playback device from Dreamedia during a promotion almost a..." ... click to read more
★★★★★
Martin
Thomas W. Hutson IV
"The whole crew at DreaMedia is awesome. Zach called back very quickly after leaving a..." ... click to read more
★★★★★
Thomas W. Hutson IV
Swaminathan Venkatramanan
"I recently ordered a jvc rs540 from Zach and they have been nothing but great...." ... click to read more
★★★★★
Swaminathan Venkatramanan
Mustaq Siddique
"I started my project just by exploring ideas but at the end it turned out..." ... click to read more
★★★★★
Mustaq Siddique
Archangels 4You
"Do not underestimate the value and service of DreamMedia. I know they're a small company, but..." ... click to read more
★★★★★
Archangels 4You
Ben Byers
"I purchased my projector from Kellen at Dreamedia a few years ago, and I couldn’t..." ... click to read more
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Ben Byers
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"Sound system is the best ever and cut the cable cord. Lights, blinds, sound and..." ... click to read more
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Bobby Cotten
Lucas Henry
"Can’t go wrong with Dreamedia!"
★★★★★
Lucas Henry
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FAQ

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How long are the lead times on orders?

Lead times generally take 3-5 days to ship and arrive. However, there are several items that may have unique ordering and freight conditions that vary.

Do you offer in-depth consultations?

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Do you offer bundles?

We have bundles that can be a one size fits most. However, we would prefer to schedule a consult to talk through your exact project. Determining what is best for your space, timeline and budget.

Can you install my system?

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.