RTJ 18Sub Quad Subwoofer - Dreamedia AV
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Dreamedia AV
A towering stack of high-fidelity speakers designed for an immersive home theater experience. Perfect for audiophiles.
A towering stack of high-fidelity speakers designed for an immersive home theater experience. Perfect for audiophiles.
RTJ

RTJ 18Sub Quad Subwoofer

RTJ

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$19,998.00

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Description

RTJ 18Sub Quad is a four-module subwoofer system built around quad 18-inch drivers for deep, high-output bass with serious headroom. Its modular design keeps placement flexible while delivering clean, controlled low end for large home theater and music systems.

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RTJ 18Sub Quad Subwoofer

$19,998.00

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Description

Four 18s, No Holding Back

If you want bass that doesn’t tap out when things get serious, the RTJ 18Sub Quad is built for that job. Four 18-inch sub modules work together to deliver deep pressure with real headroom. Big scenes hit harder, low notes stay solid, and the system doesn’t sound stressed when you turn it up.

Power That Stays Tight

Running four drivers means each one works less to do more. The result is bass that stays controlled instead of smeared, even at higher levels. You get weight and impact without the loose feel that shows up when a single sub is pushed past its comfort zone.

Modular and Easy to Place

Each module keeps a compact footprint, so placement stays flexible. Stack them, hide them behind an acoustically transparent screen, or build them into a baffle wall. Start with the quad and stop there—or expand later if the room demands more. This setup scales without drama.

Key Features

  • Quad 18-inch subwoofer modules

  • Massive headroom with controlled output

  • Deep low-frequency performance in real rooms

  • Compact modules for flexible placement

  • Designed for baffle wall or behind-screen installs

  • Cleaner bass at high volume

  • Built for large home theater systems

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  • 4x 18” Sub Module

  • 1x External Amplifier - 2x Inputs (2x 4000w Internal Amplification)

  • 10hz-200hz (In Room)

  • 20 amp @ 120 volt (1/4 Power)

Four Drivers That Don’t Quit

The quad 18″ setup gives you output and room pressurization that’s hard to beat at this level. Bass hits with authority without sounding muddy or uncontrolled — it stays solid, even when you push it.

Deep Reach Where It Matters

Because the system is tuned for low-frequency output down into the single digits, it brings out effects and notes that smaller or shallower sub setups just don’t produce. You actually feel the impact rather than guess it.

Practical Modules That Work as a Team

Each 18″ module keeps the footprint manageable so you can place these subs where they fit. As a group, they work well for larger rooms or private theaters where deep, powerful bass is a must but you don’t want giant boxes everywhere.

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"I’ve followed Dreamedia on YouTube for many years and have also had family members buy all their av gear through them. Well now it was my turn, and as expected,..."... click to read more
Deepankar Biswas
"Zach and his brother did an awesome job. They were punctual and installation was..." ... click to read more
★★★★★
Deepankar Biswas
Gunnu
"Great stop for all home theater needs and wonderful service"
★★★★★
Gunnu
Michael Kamm
"I am very happy with the services that I received from Dreamedia. These guys..." ... click to read more
★★★★★
Michael Kamm
John Flores
"Seen Zach on Youtube and loved his enthusiasm for home theater. For years my..." ... click to read more
★★★★★
John Flores
L Phillips
"I recently bought a Epson projector and Dragonfly screen from Zach at Dreamedia and cannot..." ... click to read more
★★★★★
L Phillips
Christi Felabom
"Kellen was awesome. Helped me through the whole process and answered all my questions. Wonder..." ... click to read more
★★★★★
Christi Felabom
Bobby Cotten
"Sound system is the best ever and cut the cable cord. Lights, blinds, sound and..." ... click to read more
★★★★★
Bobby Cotten
Alarick Wright
"I had planned to order a pair of Perlisten R5Ms, but got a great deal..." ... click to read more
★★★★★
Alarick Wright
Peter Eichen
"Excellent experience with Zach! I ordered a projector and mount based on his recommendations...." ... click to read more
★★★★★
Peter Eichen
Amy Miller
"Very knowledgeable and helpful! Would highly recommend"
★★★★★
Amy Miller
BJ Broderick
"I’ve followed Dreamedia on YouTube for many years and have also had family members buy..." ... click to read more
★★★★★
BJ Broderick
Anthony Brewer
"Called Dreameadia to acquire about an outdoor sound system for my buddies' place. Kellen helped..." ... click to read more
★★★★★
Anthony Brewer
Deepankar Biswas
"Zach and his brother did an awesome job. They were punctual and installation was..." ... click to read more
★★★★★
Deepankar Biswas
Gunnu
"Great stop for all home theater needs and wonderful service"
★★★★★
Gunnu
Michael Kamm
"I am very happy with the services that I received from Dreamedia. These guys..." ... click to read more
★★★★★
Michael Kamm
John Flores
"Seen Zach on Youtube and loved his enthusiasm for home theater. For years my..." ... click to read more
★★★★★
John Flores
L Phillips
"I recently bought a Epson projector and Dragonfly screen from Zach at Dreamedia and cannot..." ... click to read more
★★★★★
L Phillips
Christi Felabom
"Kellen was awesome. Helped me through the whole process and answered all my questions. Wonder..." ... click to read more
★★★★★
Christi Felabom
Bobby Cotten
"Sound system is the best ever and cut the cable cord. Lights, blinds, sound and..." ... click to read more
★★★★★
Bobby Cotten
Alarick Wright
"I had planned to order a pair of Perlisten R5Ms, but got a great deal..." ... click to read more
★★★★★
Alarick Wright
Peter Eichen
"Excellent experience with Zach! I ordered a projector and mount based on his recommendations...." ... click to read more
★★★★★
Peter Eichen
Amy Miller
"Very knowledgeable and helpful! Would highly recommend"
★★★★★
Amy Miller
BJ Broderick
"I’ve followed Dreamedia on YouTube for many years and have also had family members buy..." ... click to read more
★★★★★
BJ Broderick
Anthony Brewer
"Called Dreameadia to acquire about an outdoor sound system for my buddies' place. Kellen helped..." ... click to read more
★★★★★
Anthony Brewer
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★★★★★

Outstanding Installation

"I am very happy with the services that I received from Dreamedia. These guys..."

Michael Kamm
★★★★★

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"I bought an amp for my subs. The amp arrived quickly and the performance is..."

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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?

Yes! You can schedule a free consultation under our Contact page.

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.