"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)


OUR PRICE:
From $2,629.00 to $2,930.00
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
$2,659.00

Customer Reviews

Based on 39 reviews
92%
(36)
8%
(3)
0%
(0)
0%
(0)
0%
(0)
D
Darold Anderson (Austin, TX, US)
Big sound in a small package! '22 Ford F-150 Lightning

Purchased the Ford-specific Focal drops-ins from the outlet (well worth the outlet price) as well as the stealth behind the seat sub kit with full sound deadening and block offs. The install took a weekend because the door soundproofing is tedious (not at all hard), but the end result was VERY worth it. I may amp the Focals in the future, but they already sound quite a bit better than stock and the sound deadening / block off plates made a world of difference. The subs hit surprisingly hard for being 6.5" and they go fairly low for house, rap, etc. Country and rock have a great punch, although some rock music that has softer bass notes could use a bit more oomf... but it's a massive improvement over stock B&O system.

Had an issue with the sub box being damaged in shipping and although it's taken a while to get a new box shipped out, it was a no-hassle process. They are very good to work with.

G
George Tallant (Portland, OR, US)
23 F150

I love it! It’s exactly what I wanted for my truck. I carry MX gear and dogs in my truck so anything other than this wouldn’t have worked. It hits hard but doesn’t alert people outside. My only wish was I would it sound better if I had just bought the whole kit instead of building my own? This was my first time building something like that.

J
Jason Johnson (Saint Augustine, FL, US)
Perfect upgrade to the B&O Unleashed system 2023 Ford Raptor

the "Stealth" Behind the Seat Subwoofer Plug & Play System Upgrade (All Factory Systems including B&O Unleashed) has completely changed the sound and feeling inside of my raptor. I highly recommend this to anybody that feels like the factory system is under performing. This will blow you out of the water for what it is. Granite this is not a 10 inch or 12 inch subwoofer, but it is a massive upgrade to the OEM system.

V
Victor Rosales (Grand Junction, CO, US)
Plug & Play

I luckily got my Arealth 9 channel on sale for Black Friday. I watched the install videos on the YouTube several times and followed along step by step during the install which I did myself and didn't take to a stereo shop. Everything is clearly labeled and provided in the kit. A long as you can work an impact gun, razor blade, drill, and trim tool, it literally is 11 connections to make. I've never installed a stereo system before, but in two days, I had the very best system I've ever heard. Highly recommend these guys! I I did have to call in a few times for questions needing answered and they always answered them and walked me through.

J
Jonathan C. (Stafford, VA, US)
2024 F-150 Lariat Stealth V2 Bass Upgrade

Installed the Stealth V2 enclosure in a 2024 F-150 Lariat (14 Speaker B&O). The enclosure fits perfectly behind the rear seat. Note: the two bolts that secure the OEM Sub Enclosure must be removed in order for the Stealth V2 to fit properly. I’m very pleased and impressed with the two 6.5 inch subwoofers! I have the Musway 5 channel (Five.100+) at 1x400w @ 2 ohms driving the Stealth V2, and driving the front and rear speakers at 4x115w @ 4 ohms. In my opinion, this is the perfect option for a very nice bass upgrade, while maintaining the storage space under the rear seat. Great design, and great customer service from the SGS Team!

S
Stan S (Granite Bay, CA, US)
Nice upgrade over factory B&O

Sounds amazing! I have done many car stereo upgrades over the years and this one has been engineered to perfection. Install was very straight forward after watching the full install video twice. Four stars due to the ZEN interface. My backup and front warning sound is not as loud when music is playing and it is a bit delayed which is a problem when I pull into the garage. Also, a little disapointed that the package went on sale a week after I recieved it.

B
Britt (Naperville, IL, US)
The perfect bass upgrade!

I was hesitant at first because I didn’t think a subwoofer upgrade would be too noticeable in my 2023 Raptor with the B&O system and would potentially muddy the sound but I was wrong. You don’t realize how underwhelming the factory system is until you get the SGS stealth kit. The subs hit hard and are extremely precise versus the overly bassy factory woofer.

Fit was amazing and the performance is exactly what I needed for the type of music I listen too.

Judge.me YouTube video placeholder
R
RJ B. (Richfield, WI, US)
Sounds Awesome

Love the kit, was easy to install in a 2015 Supercrew. The videos helped a ton to watch before starting the project to get prepared before starting. I started out trying to build my own system but realized how much I didn't know about car audio and this was the perfect solution down to the tools that came with it. My only suggestion is to include a roller with the sound deadening, that was the one thing I forgot to buy ahead of the kit arriving. The $3 one from ebay worked great.

C
Chad Lintner (Hartford, WI, US)
Amazing Sound Great Service!

I bought this stealth kit for my 2022 F150 along with their block off plates, and sound deadening. I had already upgraded my door speakers so I also added another amp from them for the door speakers and Zen interface. I had some issues early on with a harness they supplied but they were quick to respond and ship me a replacement to fix the issue. My only complaint is the pre wired loaded amps are upside down. Maybe by design? But it sure makes it hard to adjust the gains when the rack is bolted to the truck. I’m still tweaking the settings, but this setup gets LOUD! Way better than the stock Ford stuff. The video install they have helped a ton for a do it yourself install. One thing I noticed is the carpet was very close to the subs, so I ended up cutting my carpet out on the floor where the two subs fire down. I also cut the stud down that they tell you to be very careful not to put thru the speaker. For me I’d rather just eliminate that possibility. I definitely will not hesitate to recommend this setup from Sound Good Stereo! It is a very nice complete set!

E
Erik Bengtson (Olalla, WA, US)
Amazing sound, minimal loss in function

Installed the Stealth" Mosconi-Gladen Audio RS 5-channel Passive Pre-Tuned Plug & Play Behind the Seat Stereo Upgrade on my 2021 F150 and first off it sounds absolutely amazing. The small subwoofers pound SIGNIFICANTLY harder than the OEM Ford/Kicker unit I installed when I first got the truck.

Only reason I gave it 4 stars is the driver side seat no longer locks in the full upward position, which can be frustrating when loading larger items on the floor.

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 39 reviews
92%
(36)
8%
(3)
0%
(0)
0%
(0)
0%
(0)
D
Darold Anderson (Austin, TX, US)
Big sound in a small package! '22 Ford F-150 Lightning

Purchased the Ford-specific Focal drops-ins from the outlet (well worth the outlet price) as well as the stealth behind the seat sub kit with full sound deadening and block offs. The install took a weekend because the door soundproofing is tedious (not at all hard), but the end result was VERY worth it. I may amp the Focals in the future, but they already sound quite a bit better than stock and the sound deadening / block off plates made a world of difference. The subs hit surprisingly hard for being 6.5" and they go fairly low for house, rap, etc. Country and rock have a great punch, although some rock music that has softer bass notes could use a bit more oomf... but it's a massive improvement over stock B&O system.

Had an issue with the sub box being damaged in shipping and although it's taken a while to get a new box shipped out, it was a no-hassle process. They are very good to work with.

G
George Tallant (Portland, OR, US)
23 F150

I love it! It’s exactly what I wanted for my truck. I carry MX gear and dogs in my truck so anything other than this wouldn’t have worked. It hits hard but doesn’t alert people outside. My only wish was I would it sound better if I had just bought the whole kit instead of building my own? This was my first time building something like that.

J
Jason Johnson (Saint Augustine, FL, US)
Perfect upgrade to the B&O Unleashed system 2023 Ford Raptor

the "Stealth" Behind the Seat Subwoofer Plug & Play System Upgrade (All Factory Systems including B&O Unleashed) has completely changed the sound and feeling inside of my raptor. I highly recommend this to anybody that feels like the factory system is under performing. This will blow you out of the water for what it is. Granite this is not a 10 inch or 12 inch subwoofer, but it is a massive upgrade to the OEM system.

V
Victor Rosales (Grand Junction, CO, US)
Plug & Play

I luckily got my Arealth 9 channel on sale for Black Friday. I watched the install videos on the YouTube several times and followed along step by step during the install which I did myself and didn't take to a stereo shop. Everything is clearly labeled and provided in the kit. A long as you can work an impact gun, razor blade, drill, and trim tool, it literally is 11 connections to make. I've never installed a stereo system before, but in two days, I had the very best system I've ever heard. Highly recommend these guys! I I did have to call in a few times for questions needing answered and they always answered them and walked me through.

J
Jonathan C. (Stafford, VA, US)
2024 F-150 Lariat Stealth V2 Bass Upgrade

Installed the Stealth V2 enclosure in a 2024 F-150 Lariat (14 Speaker B&O). The enclosure fits perfectly behind the rear seat. Note: the two bolts that secure the OEM Sub Enclosure must be removed in order for the Stealth V2 to fit properly. I’m very pleased and impressed with the two 6.5 inch subwoofers! I have the Musway 5 channel (Five.100+) at 1x400w @ 2 ohms driving the Stealth V2, and driving the front and rear speakers at 4x115w @ 4 ohms. In my opinion, this is the perfect option for a very nice bass upgrade, while maintaining the storage space under the rear seat. Great design, and great customer service from the SGS Team!

S
Stan S (Granite Bay, CA, US)
Nice upgrade over factory B&O

Sounds amazing! I have done many car stereo upgrades over the years and this one has been engineered to perfection. Install was very straight forward after watching the full install video twice. Four stars due to the ZEN interface. My backup and front warning sound is not as loud when music is playing and it is a bit delayed which is a problem when I pull into the garage. Also, a little disapointed that the package went on sale a week after I recieved it.

B
Britt (Naperville, IL, US)
The perfect bass upgrade!

I was hesitant at first because I didn’t think a subwoofer upgrade would be too noticeable in my 2023 Raptor with the B&O system and would potentially muddy the sound but I was wrong. You don’t realize how underwhelming the factory system is until you get the SGS stealth kit. The subs hit hard and are extremely precise versus the overly bassy factory woofer.

Fit was amazing and the performance is exactly what I needed for the type of music I listen too.

Judge.me YouTube video placeholder
R
RJ B. (Richfield, WI, US)
Sounds Awesome

Love the kit, was easy to install in a 2015 Supercrew. The videos helped a ton to watch before starting the project to get prepared before starting. I started out trying to build my own system but realized how much I didn't know about car audio and this was the perfect solution down to the tools that came with it. My only suggestion is to include a roller with the sound deadening, that was the one thing I forgot to buy ahead of the kit arriving. The $3 one from ebay worked great.

C
Chad Lintner (Hartford, WI, US)
Amazing Sound Great Service!

I bought this stealth kit for my 2022 F150 along with their block off plates, and sound deadening. I had already upgraded my door speakers so I also added another amp from them for the door speakers and Zen interface. I had some issues early on with a harness they supplied but they were quick to respond and ship me a replacement to fix the issue. My only complaint is the pre wired loaded amps are upside down. Maybe by design? But it sure makes it hard to adjust the gains when the rack is bolted to the truck. I’m still tweaking the settings, but this setup gets LOUD! Way better than the stock Ford stuff. The video install they have helped a ton for a do it yourself install. One thing I noticed is the carpet was very close to the subs, so I ended up cutting my carpet out on the floor where the two subs fire down. I also cut the stud down that they tell you to be very careful not to put thru the speaker. For me I’d rather just eliminate that possibility. I definitely will not hesitate to recommend this setup from Sound Good Stereo! It is a very nice complete set!

E
Erik Bengtson (Olalla, WA, US)
Amazing sound, minimal loss in function

Installed the Stealth" Mosconi-Gladen Audio RS 5-channel Passive Pre-Tuned Plug & Play Behind the Seat Stereo Upgrade on my 2021 F150 and first off it sounds absolutely amazing. The small subwoofers pound SIGNIFICANTLY harder than the OEM Ford/Kicker unit I installed when I first got the truck.

Only reason I gave it 4 stars is the driver side seat no longer locks in the full upward position, which can be frustrating when loading larger items on the floor.

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