"Stealth Plus" Behind the Seat Subwoofer Plug & Play System Upgrade (B&O 8-Speaker)
"Stealth Plus" Behind the Seat Subwoofer Plug & Play System Upgrade (B&O 8-Speaker)
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"Stealth Plus" Behind the Seat Subwoofer Plug & Play System Upgrade (All Factory Systems including B&O Unleashed)

Key Features:
  • - "Stealth" Behind the Seat Package that allows for full rear seat functionality
  • - Plus Package Includes Complete Sound Treatment - 6 Boxes (66 sqft) of BlackHole MAT plus 18 BlackHole Tiles
  • - Plus Package also includes our Custom Made Block Off Plates, Front and Rear
  • - The Number one upgrade package we offer at our facility
  • - In-House Vented Design for the Best Low-End Bass Extension
  • - Pre-Tuned in-house by our award winning team
  • - Includes EVERYTHING, shipped to your door
  • - Resolves the "bass roll off" in these trucks
  • - Delivery lead times vary, contact us for details


From $2,629.00 to $2,930.00




Stealth-Plus-Oval-BOUL

Customer Reviews

Based on 63 reviews
95%
(60)
5%
(3)
0%
(0)
0%
(0)
0%
(0)
P
Powerstroke Tech Talk w/ARod (Farmington, MI, US)
THIS was NO Joke! Best kit out there!

TO all who take the time to read this: I bought this unit for my 2020 F350 about 2yrs ago in 2023, during which I opened my own shop up, life got in the way & here my new goodies just sat covered up in the garage. Here we are in almost end of 2025 and I had to make myself an appointment just to finish MY own truck. Install was flawless, except for the instance where I SET THE SPEAKER BOX DOWN ON ONE OF THE STUDS that came up thru the floor and punctured one of the new speakers.....SMH I'm an idiot. Amp kit, the panel for the back wall was awesome. Transferred over the factory amp and it fit right where it was suppose to. I wish I would have made a video for my channel on Powerstroke Tech Talk w/ARod to show you all how I did my wiring. Came out nice. So back to the speakers. I had to tuck my tail between my legs & call up SGS and let the technician know what I had done. He advised me that those speakers have since been updated, my fault...so yes I bought two. Well, now I wanted to see if this stuff worked you know. I felt defeated with the speakers, so now I wanted to see if they at least made some sound. Turned the truck on and the power, hit the bass knob and there wasn't anything. The speakers were barely making any noise. Surely this was not the intended output. At this point the B&O sounded better. So now I need to make another call to SGS and let them know I wasn't pleased. Like man after 2 years, they weren't gonna have anything to do with me. BOY, WAS I WRONG! The technician on the phone was compassionate with my concern and patched me through to the owner Sage. He gave me some instructions after sending him some pictures & would you know I had a bummed out AMP. They 2 day shipped a replacement AMP to me, no questions asked. I CANNOT SAY ENOUGH GREAT THINGS ABOUT MY EXPERIENCE pre and post install. Ohhh and I can't forget, the packaging that this stuff came in was THEE best wrapped components that have come through the mail I have ever seen. I received the AMP 2-days later and immediately installed. I could not get on the phone fast enough with Sage to let him no I was blown away. To ANYONE thinking about OR is on the fence about getting one of these kits, DO IT!!! You will be so happy. To the SGS team, you are true leaders in customer service as I am for all my clients across the US. Thanks so much and have some great holidays coming up!!!

A
A.Beaty (Conyers, GA, US)
Sturdy and well designed

Lots of bass very satisfied

S
Steve from Omaha (Omaha, NE, US)
Stealth sub in 2025 Ford F150

I wanted to maintain my under-seat storage in my Platinum truck, so I ordered the V2 box. In my previous truck, I had the JL Audio Stealthbox with (2) 12" subs, so I was expecting a huge difference in sound. Not the case at all. The V2 won't go as low, but the overall sound is actually quite amazing. People don't believe me when I tell them it's (2) 6.5" subs. If you want clean, crisp bass with punch, purchase the V2!

C
Curtis (Malden, MA, US)
Exceeds expectations Surprised my pro tuner

I took my F150 to pro tuner after finishing my install, 9 channel DSP. The guy went on and on about the sub performance during the tune he set the crossover at 25 Hz. Today I got a follow up message from him.
“it’s honestly a great setup you have. I’m very surprised by how low the subs play as well, plus it doesn’t take up any space at all”

R
Ryan Baker (Miami, FL, US)
High quality all the way and sounds amazing

You can tell this is a quality product the moment you open the box. Extremely well packaged with items clearly labeled. If you have even the slightest technical ability this system can be installed in a few hours. No physical instructions are included but you can find what you need on the website or via YouTube. Once the system is in, it sounds amazing. I was a little concerned how it would sound, but I couldn’t be more impressed.

J
Johnathon (Owasso, OK, US)
2024 F150 B&O 8 speaker

I Upgraded my 2019 F150 w/ JL audio stealth box to a 2024 f150 and the standard B&O 8 speaker just does not have enough sub.
So I picked up the Stealth v2" Behind the Seat Subwoofer Plug & Play System Upgrade & I love it. I will definitely recommend if you’re looking for a stealth box. No one will know you have subs until you want them too.
one suggestion to the sound good team the 2024 f150 back wall is different than your must recent video. so your install video needs updated for new location of the amp, the power & the sub controller. But The team was awesome I called with a few questions and they walked me right through it.

Other than it’s a super easy install , true plug in play and they provide everything but the sockets .
Thank you sound good stereo team .

C
Curtis L (Providence, RI, US)
Can’t imagine believe it

I bought the sub and amp rack last year. Ran it for awhile and then decided I needed to upgrade to DSP. I had doubt about the size of the subs . It had great base with the Key amp but now I put an Audison mono amp 1000 watt at 1 ohm, turned down gain to match sub. And wow. I had to go to empty parking lot to listen to some EDM.

Awesome product backed up by even better customer service. When choosing a new amp I called and a real person answered! He took the time to look up some amps and gave me suggestions. Thank you!!

M
Matt (Bentonville, AR, US)
A must have

This is how the B&O Unleashed bass should have been setup from the factory. If you’re on the fence just do it, you won’t regret it.

C
Clint Dawson (San Antonio, TX, US)
"Stealth v2" Behind the Seat Subwoofer Plug & Play System

this is an amazing add to the B&O Unleashed system on my 2025 F250. Wow.... Sounds like you have two 10" subs under the seat and extremely crisp! You have to hear to believe. Very happy!

J
James (Simpsonville, SC, US)
You need this

2024-F-150 B&O 8 speaker. I bought the stealth box, kicker keyloc with harness for roll off correction, rear door and rear wall block-off plate, and two rear JL audio speakers for the rear doors. I added one 5 channel amplifier to power the stealth box and 2 rear JL Audio door speakers. It was easy to reroute the two rear door speakers in the provided harness to the amp and back in the other side. Basically, front speakers are still B&O and the rear is Sounds Good Stereo. I'm really happy with it.

Are you looking for a well-engineered, great-performing enclosure that goes behind your rear seat in your F-Series? If so, you have come across the right solution. What makes this enclosure unique is that it allows full functionality of the rear seat, without touching your subwoofers when lifted in the upright position.

While you may think a larger subwoofer is better, you are half right. Larger subwoofers require larger enclosures if you want a high level of performance, without internal airspace, the low bass will fall on its face. Bigger is better, but what you mean to say, is Bigger the Enclosure the better, not subwoofer size.

So how are we able to squeeze out so much performance from small-diameter drivers? It's a mix of science and experience. The main benefit of our enclosure is its vented (Ported) design, this allows higher efficiency over a traditional sealed enclosure. Think turbocharger on an engine, the displacement of the engine might be smaller, but horsepower goes up. This vent we can manipulate to work with the acoustics of the truck, whereas a sealed enclosure, you have very limited ways to "tune" the output.

As you might know, we work with an amazing brand JL Audio that makes some pretty amazing shallow subwoofers. So why do we not utilize those drivers in our enclosures? Simply put, the vented design of our enclosure delivers better performance in this exact application. The second part, is if you face a subwoofer forward, it will touch the seat and damage the subwoofer, nobody wants that.

Hand-Crafted Enclosure Details:
 - Pre-loaded with Two 6.5-inch Subwoofers in our vented enclosure, pre-wired
 - Premium Materials (Premium MDF, High-Grade Carpet)
 - The only enclosure that honestly fits behind the seat without damage to the subwoofers that still delivers a high level of performance
 - Hand-made by our Award Winning Team

The Loaded Subwoofer Rack "Ingredients":

Electronics:
 - Kicker Key500.1 Mono-Block Subwoofer Amplifier
 - Kicker CXARC Remote Subwoofer Level Knob

Sound Treatment:
 - 6 Boxes (66 sqft) of 3-Layer CLD BlackHole MAT (All Doors + Rear Wall)
 - 18 BlackHole Acoustical Tiles


Custom Made In-House Components:
 - Ten87 Design Custom Made Amplifier Rack
 - Front and Rear Set of Block-off Plates
 - Vehicle Specific Plug and Play T-Harness
 - Full-length Power + Ground 8ga OFC Copper Wiring Kit
 - Subwoofer harness with quick disconnect connectors
 - Factory Subwoofer Block Off Plate

Additional Touches:
 - Tool Kit with helpful installation components
 - Pre-tuned and Tested In-House by the Sounds Good Stereo Team
 - Over-packaged to ensure safe arrival
 - Includes Free Shipping in the U.S.


Looking for an overview of the package? Here is a short 15-minute video that explains how this enclosure fits behind the seat and retains full functionality:





Check out the installation video below for a walk-through:



Installation requires slight modification to the rear carpet panel. The photo below shows the section that needs to be removed. 


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Customer Reviews

Based on 63 reviews
95%
(60)
5%
(3)
0%
(0)
0%
(0)
0%
(0)
P
Powerstroke Tech Talk w/ARod (Farmington, MI, US)
THIS was NO Joke! Best kit out there!

TO all who take the time to read this: I bought this unit for my 2020 F350 about 2yrs ago in 2023, during which I opened my own shop up, life got in the way & here my new goodies just sat covered up in the garage. Here we are in almost end of 2025 and I had to make myself an appointment just to finish MY own truck. Install was flawless, except for the instance where I SET THE SPEAKER BOX DOWN ON ONE OF THE STUDS that came up thru the floor and punctured one of the new speakers.....SMH I'm an idiot. Amp kit, the panel for the back wall was awesome. Transferred over the factory amp and it fit right where it was suppose to. I wish I would have made a video for my channel on Powerstroke Tech Talk w/ARod to show you all how I did my wiring. Came out nice. So back to the speakers. I had to tuck my tail between my legs & call up SGS and let the technician know what I had done. He advised me that those speakers have since been updated, my fault...so yes I bought two. Well, now I wanted to see if this stuff worked you know. I felt defeated with the speakers, so now I wanted to see if they at least made some sound. Turned the truck on and the power, hit the bass knob and there wasn't anything. The speakers were barely making any noise. Surely this was not the intended output. At this point the B&O sounded better. So now I need to make another call to SGS and let them know I wasn't pleased. Like man after 2 years, they weren't gonna have anything to do with me. BOY, WAS I WRONG! The technician on the phone was compassionate with my concern and patched me through to the owner Sage. He gave me some instructions after sending him some pictures & would you know I had a bummed out AMP. They 2 day shipped a replacement AMP to me, no questions asked. I CANNOT SAY ENOUGH GREAT THINGS ABOUT MY EXPERIENCE pre and post install. Ohhh and I can't forget, the packaging that this stuff came in was THEE best wrapped components that have come through the mail I have ever seen. I received the AMP 2-days later and immediately installed. I could not get on the phone fast enough with Sage to let him no I was blown away. To ANYONE thinking about OR is on the fence about getting one of these kits, DO IT!!! You will be so happy. To the SGS team, you are true leaders in customer service as I am for all my clients across the US. Thanks so much and have some great holidays coming up!!!

A
A.Beaty (Conyers, GA, US)
Sturdy and well designed

Lots of bass very satisfied

S
Steve from Omaha (Omaha, NE, US)
Stealth sub in 2025 Ford F150

I wanted to maintain my under-seat storage in my Platinum truck, so I ordered the V2 box. In my previous truck, I had the JL Audio Stealthbox with (2) 12" subs, so I was expecting a huge difference in sound. Not the case at all. The V2 won't go as low, but the overall sound is actually quite amazing. People don't believe me when I tell them it's (2) 6.5" subs. If you want clean, crisp bass with punch, purchase the V2!

C
Curtis (Malden, MA, US)
Exceeds expectations Surprised my pro tuner

I took my F150 to pro tuner after finishing my install, 9 channel DSP. The guy went on and on about the sub performance during the tune he set the crossover at 25 Hz. Today I got a follow up message from him.
“it’s honestly a great setup you have. I’m very surprised by how low the subs play as well, plus it doesn’t take up any space at all”

R
Ryan Baker (Miami, FL, US)
High quality all the way and sounds amazing

You can tell this is a quality product the moment you open the box. Extremely well packaged with items clearly labeled. If you have even the slightest technical ability this system can be installed in a few hours. No physical instructions are included but you can find what you need on the website or via YouTube. Once the system is in, it sounds amazing. I was a little concerned how it would sound, but I couldn’t be more impressed.

J
Johnathon (Owasso, OK, US)
2024 F150 B&O 8 speaker

I Upgraded my 2019 F150 w/ JL audio stealth box to a 2024 f150 and the standard B&O 8 speaker just does not have enough sub.
So I picked up the Stealth v2" Behind the Seat Subwoofer Plug & Play System Upgrade & I love it. I will definitely recommend if you’re looking for a stealth box. No one will know you have subs until you want them too.
one suggestion to the sound good team the 2024 f150 back wall is different than your must recent video. so your install video needs updated for new location of the amp, the power & the sub controller. But The team was awesome I called with a few questions and they walked me right through it.

Other than it’s a super easy install , true plug in play and they provide everything but the sockets .
Thank you sound good stereo team .

C
Curtis L (Providence, RI, US)
Can’t imagine believe it

I bought the sub and amp rack last year. Ran it for awhile and then decided I needed to upgrade to DSP. I had doubt about the size of the subs . It had great base with the Key amp but now I put an Audison mono amp 1000 watt at 1 ohm, turned down gain to match sub. And wow. I had to go to empty parking lot to listen to some EDM.

Awesome product backed up by even better customer service. When choosing a new amp I called and a real person answered! He took the time to look up some amps and gave me suggestions. Thank you!!

M
Matt (Bentonville, AR, US)
A must have

This is how the B&O Unleashed bass should have been setup from the factory. If you’re on the fence just do it, you won’t regret it.

C
Clint Dawson (San Antonio, TX, US)
"Stealth v2" Behind the Seat Subwoofer Plug & Play System

this is an amazing add to the B&O Unleashed system on my 2025 F250. Wow.... Sounds like you have two 10" subs under the seat and extremely crisp! You have to hear to believe. Very happy!

J
James (Simpsonville, SC, US)
You need this

2024-F-150 B&O 8 speaker. I bought the stealth box, kicker keyloc with harness for roll off correction, rear door and rear wall block-off plate, and two rear JL audio speakers for the rear doors. I added one 5 channel amplifier to power the stealth box and 2 rear JL Audio door speakers. It was easy to reroute the two rear door speakers in the provided harness to the amp and back in the other side. Basically, front speakers are still B&O and the rear is Sounds Good Stereo. I'm really happy with it.

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