2021+ Ford F150 Behind Seat Subwoofer Box

If you want serious bass in your 2021+ Ford F-150 without giving up usable space, this enclosure was built for that exact job.

This is a sealed subwoofer box designed specifically for the Stereo Integrity BM-11 and made to fit behind the rear seat of 2021+ Ford F-150 Crew Cab/SuperCrew trucks. The enclosure includes integrated side mounting provisions for a Kicker Key 500.1 amplifier, with easy access to the amp’s controls and settings once installed.

With 0.54 ft³ internal volume, this box is designed to deliver tight, controlled bass from the BM-11 in a compact behind-seat package. Each enclosure is built to order and includes the brackets, mounting hardware, and speaker terminal needed to get started.

The enclosure is 3D printed from a very durable plastic, resulting in an extremely stiff and sturdy box. Because the enclosure is printed in two sections and then plastic welded together, there will be a visible cosmetic seam down the center. This does not affect strength or performance in any way.

Important fitment note:
The box fits in the truck as-is, but a seat recline kit is required if you want enough clearance for the lower rear seat cushion to fold fully into the upright position without interference. Generic seat recline kits are commonly available on eBay. 

Foam tape is recommended to properly seal the subwoofer to the enclosure. Buyer is responsible for wiring and proper installation. Basic problem solving and experience may be required for proper installation.

This has been tested and verified to fit 2021-2026 model F150 Crew Cab Pickups.

Not verified to fit vehicles equipped with Premium audio B&O system.

It should fit the following but has not been verified.

• Ford F-150 2015-2026
• Ford F-250 Super Duty 2017-2026
• Ford F-350 Super Duty 2026
• Ford F-450 Super Duty 2026
• Ford F-550 Super Duty 2026

  
  

Features

• Designed for 2021+ Ford F-150 Crew Cab/SuperCrew
• Built specifically for the Stereo Integrity BM-11
• Fits behind the rear seat
• Sealed enclosure
• 0.54 ft³ internal volume
• Integrated side mount for Kicker Key 500.1 amplifier
• Amp mount allows easy access to settings
• Extremely stiff, durable construction
• Includes brackets, mounting hardware, and speaker terminal
• Built to order

What’s Included

• Sealed subwoofer enclosure
• Mounting brackets
• Mounting hardware
• Speaker terminal

What’s Not Included

• Stereo Integrity BM-11 subwoofer( see our bundled option here)
• Kicker Key 500.1 amplifier
• Wiring or wiring harness
• Foam tape
• Seat recline kit
• Installation incidentals

Fitment / Installation Notes

• Fits 2021+ Ford F-150 Crew Cab/SuperCrew
• Installs behind the rear seat
• A seat recline kit is recommended/required for enough clearance to allow the lower seat cushion to fold upright without interference
• Foam tape is suggested between the subwoofer and box for proper sealing
• Buyer is responsible for confirming fitment and performing proper installation

Lead Time
Please allow up to 2 weeks for shipment, as each enclosure is built to order.

Condition / Manufacturing Note
This enclosure is 3D printed in two separate sections and then welded together. A visible cosmetic parting line will be present down the center. This is normal and does not affect performance, stiffness, or durability.