Built to order — one custom underseat enclosure per quantity ordered.

2009+ Ford F-150 Crew Cab Underseat Subwoofer Enclosure

This SMS Precision enclosure is built for compatible 2009-and-newer Ford F-150 Crew Cab trucks and is configured around the exact subwoofer layout, finish, driver dimensions and required rear-seat clearance.

Before You Order

• 2.5-inch rear-seat lift: Required on every configuration.
• Seat-lift hardware: Not included.
• Available layouts: 2×6.5, 4×6.5, 6×6.5, 2×8, 4×8, or 2×10.
• Available finishes: Bare Wood, Carpeted, Bed Lined, or Vinyl Face.
• Exact subwoofer: Select the actual model in the builder or provide the required manufacturer dimensions.
• 10-inch / deep-driver review: Mounting depth is required; drivers over 6.5 inches deep are flagged for additional clearance review.

Add to Cart stays locked until the required truck, layout, seat-lift and driver-fitment checks are complete.

Choose the Layout Around the System

Subwoofer count and nominal size determine the baffle layout and fitment review. They do not change the base enclosure price by themselves. The exact driver still has to fit the available underseat volume and seat-lift geometry.

• 2×6.5 / 4×6.5 / 6×6.5: For systems intentionally built around compatible 6.5-inch subs.
• 2×8 / 4×8: For compatible 8-inch layouts with verified frame, basket and mounting depth.
• 2×10: For a dual-10 system where the exact drivers clear the available space; deep drivers receive additional review.

Choose the Finish

• Bare Wood: Fabricated enclosure with no cosmetic finish.
• Carpeted: Conventional finished enclosure surface.
• Bed Lined: Durable coated finish.
• Vinyl Face: Upgraded visible face treatment.

Base enclosure pricing is controlled by finish, not subwoofer count. Paid fabrication upgrades are added separately when selected.

Built Around the Exact Subwoofer

Two subs with the same nominal diameter can use very different cutouts, frames, baskets, terminals and mounting depths. Listed drivers use the fitment data in the builder; unlisted or incomplete drivers require current manufacturer cutout, outside-frame and mounting-depth measurements before fabrication.

What Happens After Checkout

The order does not go directly into fabrication. SMS Car Audio reviews the truck year, layout, exact subwoofer, finish, required 2.5-inch seat-lift acknowledgement, clearance review and paid upgrades first. If SMS verification is selected, the driver dimensions are confirmed with the customer before cutting begins.

What Comes With It

One custom underseat enclosure in the selected configuration. Subwoofers, amplifier, seat-lift hardware, wiring and installation are not included unless specifically stated elsewhere on the order.

Exact Product Details