MTI Acoustics Stage 3 Under-Seat Enclosure

Custom finish. Custom lighting. Same performance-first engineering.

Stage 3 builds upon the upgraded finish of our Stage 2 enclosure while adding RGB accent lighting for a more customized appearance.

Every MTI Acoustics enclosure is made to order around your vehicle and specific subwoofer(s). Please provide all requested vehicle and subwoofer information in the build notes. Missing or incomplete information may delay production.

Stage 3 Lead Time: 20-25 Business Days

Standard Features

• Vinyl wrapped perimeter (Black Katzkin standard)
• Black stitching on upper perimeter
• RGB accent lighting
• 3/4" MDF construction
• Structural internal bracing
• Rounded-edge design
• Clean, unobstructed front panel

Available Upgrades

• OEM badge or custom etching
• Ported Design — Limited to a maximum of (2) 10" subwoofers without a 2.5" or greater seat lift
• SMD TCR-1 Terminal for higher-power applications
• Storage Cubby with single sealed-subwoofer configurations; available storage space varies based on the subwoofer selected

Built to order in College Station, Texas.

Maximum Subwoofer Mounting Depth

Mounting depth varies based on subwoofer diameter and whether the enclosure is being used with a 2.5" seat lift.

Mounting depth is measured from the subwoofer mounting surface to the deepest point of the driver.

Maximum Gross Internal Volume

Final internal volume is dependent on the specific subwoofer(s) being used. Internal chambering and/or additional bracing may be incorporated to achieve the proper net airspace for the selected drivers.

*Volumes shown are gross internal volumes, with consideration given to our 3/4" structural bracing. Final usable/net volume will vary based on the specific subwoofer(s), displacement, and enclosure design.

Floor-to-Baffle Clearance

Standard clearance: 2"

The 2" floor-to-baffle spacing is our standard starting point, but it is not a fixed dimension. Clearance may be adjusted during the design process when necessary based on the specific subwoofer(s) being used, including surround clearance and excursion requirements.

Important Fitment Information

Enclosures are designed for installation without a floor mat or floor liner, as either may affect proper fitment.

Trucks equipped with OEM under-seat storage require its removal, with the factory mounting bolts either removed or cut flush.

Subwoofers are not included in the listed price.

Due to the custom, made-to-order nature of this product, all sales are final.