Factory Subwoofer Block Off Plate for Rear Wall (Includes Unleashed) - Required for the 2021-2024 Ford F-150 B&O

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Factory Subwoofer Block Off Plate for Rear Wall (Includes Unleashed) - Required for the 2021-2026 Ford B&O Systems

Key Features:

- Made of high-quality HDPE plastic, CNC Machined in-house
- Includes Laser Cut Foam Gasket for proper seal to the cabin
- Precision machined from 1/2-inch HDPE for a perfect fit
- Required Item when removing the factory subwoofer from the truck
- Smart alternative to those that would like a non-invasive and easy back to factory approach

$55.00

Quantity must be 1 or more

SKU: BOSubPlate

Simple and effective

Well, made easy to install. does a great job.

Reverse it!

When I found the block off plate, it looked to be exactly what I needed. When I received it the fit was just what is needed. The flange with the screw holes could be a little wider, as the screw holes you put in the back wall of your pickup are fairly close to the opening. Also, SGS should have put the inscription on the inside of the pickup rather than exposed to the elements and the chassis on the vehicle. I’m just being nit-picky…it’s just what I needed!

Good product

Just what I needed once I figured out how to turn it from a 4 gauge to a 1 gauge, all was good.

Great block-off plate for Ford trucks!

Fit, finish and plate alignment was excellent. Great product to seal up the rectangular hole in the back of the cab, after removing the Ford B&O Unleashed subwoofer. If you remove your factory B&O subwoofer, you'll need a block off plate to seal off the outside elements and road noise - this does the trick perfectly.

Simple but necessary

Like everything else I’ve ordered from SGS, this was of high quality and shipped to my door quickly. Absolutely necessary when removing the factory “infinite baffle” sub.

Perfect Fit

Great product it fit very well and well made
I'm very happy with it I'll recommend it.

The only proper way to eliminate the factory sub

Great fit, but a little expensive for what it is.

fit great

No Headache, Easy way to cover subwoofer hole

Followed comments from other reviews, and added double stick tape vs using the screws. Simple install when removing the factory sub.

Worth the $$

I saw some reviews complaining about the price for a "piece of plastic." In my opinion, this item was well worth the price. There is quite literally a giant hole in your truck when you remove the factory "subwoofer." this thing is well made, fits perfect and provide a seal to keep the weather out. Well worth the money in my opinion.

Product Description
Fitment Guide
Customer Reviews

Product Description

Upgrading your 2021+ Ford F-150 or 2023+ Super-Duty B&O Stereo system? If so you will need this plate to block off the factory subwoofer hole on the rear wall. This hole is open to the exterior and this custom-made plate along with the laser-cut gasket is the perfect solution. It is CNC machined in-house from 1/2-inch HDPE to our specifications and fits like a glove. Includes 6 Zinc coated machine screws for anti-corrosion on the aluminum chassis and you just need a 1/8-inch drill bit to install.

Any questions, please let us know.

Fitment Guide

Customer Reviews

Simple and effective

Well, made easy to install. does a great job.

Reverse it!

Good product

Just what I needed once I figured out how to turn it from a 4 gauge to a 1 gauge, all was good.

Great block-off plate for Ford trucks!

Simple but necessary

Like everything else I’ve ordered from SGS, this was of high quality and shipped to my door quickly. Absolutely necessary when removing the factory “infinite baffle” sub.

Perfect Fit

Great product it fit very well and well made
I'm very happy with it I'll recommend it.

The only proper way to eliminate the factory sub

Great fit, but a little expensive for what it is.

fit great

No Headache, Easy way to cover subwoofer hole

Followed comments from other reviews, and added double stick tape vs using the screws. Simple install when removing the factory sub.

Worth the $$

(1170)

2024 F150 block off plates

I picked up a set of custom door access block off plates from Sounds Good Stereo for my 2024 Ford F-150 and they exceeded expectations right from delivery.
Shipping was quick and reliable—arrived faster than anticipated with no delays. The packaging was professional and top-tier: everything double-boxed, with custom foam cutouts, bubble wrap, and secure wrapping so the plates showed up in perfect condition, zero scratches or bends. No worries about transit damage at all.
The plates themselves are extremely well made—cut from high-quality, thick HDPE plastic (feels sturdy and premium, not cheap ABS), precisely CNC-machined to fit perfectly without gaps, and finished smoothly. Installation was straightforward (used the alignment holes, added a bit of silicone for seal as recommended), and the difference in sound is immediate: tighter, punchier mid-bass from the doors, less cancellation from the factory holes, and overall cleaner response without swapping speakers. Paired with some sound deadening, it’s a game-changer for factory-ish setups wanting better performance.
Sounds Good Stereo nailed it on quality and service—great communication if needed, and these are a smart, affordable upgrade. Highly recommend for anyone chasing better door speaker output!

T Harness/ RCA ‘19 GMC Sierra w/ Bose

A must have if you’re wanting to add and amp to the Bose system. Makes install so much easier no taping into speaker wire. Sounds Good Stereo were very knowledgeable and shipping was fast and easy ABSOLUTELY would use them again for my next build. 💯 recommend!

Kicker keyloc

Installed the kicker keyloc on my ‘25 Ranger Raptor B&O system. Thank you for a great and easy to install, tech support was very helpful. Thanks again system sounds clean and powerful, JL 500w amp , Rockford T1S2-10 sub loaded into a Skar under seat box.

Quality Sales and Support

I purchased the kit that included the LOC and it was such a simple plug and play device that was all made from high quality parts. I had an issue post install that ended up being completely unrelated to the equipment I purchased, however, a support specialist stayed on the phone with me working through some troubleshooting until it was figured out and fixed. Thanks for the support after the sale. Big PLUS in my book!

2022 Ford F150 B&O Unleashed - factory roll off fixed

Great product. I am so glad I purchased the factory harness with the pre-tuned Kicker Key LOC. I was having trouble tuning my sub addition due to the factory roll off and this solved all my issues.

Awesome product!

Awesome product. Makes it so you are able to keep everything nice and neat. There was some seat back trimming required, but not bad at all.

It works but wires are labeled wrong

I installed this in a 2019 GMC Sierra. I decided to test it out with a tone generator before wiring it to my line out converter and about half of the speaker wire leads were labeled wrong and I had to relabel them. Besides that it worked fine. Just had to spend an extra 20 or 30 minutes trying to figure out all the wiring on it would have made my job a lot easier if it was labeled right in the first place

Important: Don't rely on generic harness labels alone. Each GM vehicle has unique wiring configurations, even though this harness is compatible with hundreds of GM models.

We strongly recommend obtaining the factory wiring diagram specific to your exact vehicle year/make/model. The best resource is acdelcotds.com/subscriptions - their 3-day membership gives you access to official GM wiring diagrams, which will ensure proper installation of this DIY harness.

Having the correct diagram will help you identify the exact wire functions for your specific vehicle and avoid potential installation issues.
Thanks for bringing this up!

Underseat Amp Rack Works Great

I purchased this to secure my amplifier and line output converter underneath my seat and clean up (hide) the wiring. Works great!

Behind-the-Seat >>> Subwoofer Plug & Play System with Sound Treatment

Product was delivered as expected and packaged extremely well. Installation was not difficult but would have been much easier if there was a current video for a 2024 Ford F250 install as they are a little different than the video explains. Placed a call to Sounds Good and they answered the phone with a person and they answered my question over the phone and the rest of the install was a breeze. Quality of the material is very good and the sound is much better than the factory Sub. With the sound material and block off plates the truck sounds like it should and I am very pleased with the purchase. Highly recommend the product if you are looking for extra clean base without breaking the bank.

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Factory Subwoofer Block Off Plate for Rear Wall (Includes Unleashed) - Required for the 2021-2026 Ford B&O Systems

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IN-HOUSE TECH SUPPORT

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