All MTI Acoustics enclosures are made to order, at time of order. Please be sure to include all necessary information on the final page of checkout. This Stage 1 enclosure will ship within 15-20 business days of your order date. Lead times can be impacted if proper/complete information is not included in your order notes. Thank you.

Want some great sounding bass in your GMC Sierra HD Crew Cab and want your subwoofer enclosure to look great? The MTI Acoustics Stage 1 Under Seat Enclosure is the perfect solution!

Standard features include:
-Black Premium Carpet Wrap.
-3/4" MDF construction.
-Rounded edge design.
-Smooth, unobstructed front panel.

Available upgrades for your Stage 1:
-Acrylic insert with OEM badge of choice.
-Ported enclosure. No more than (2) 10" subwoofers without using a 2.5" (or more) seatlift.
-SMD TCR-1 Upgraded Speaker terminal for use with higher power amps.
-Internal damping. This closed cell foam aids in killing any unwanted resonance within the enclosure.

Enclosure Depths:
-Maximum downfire subwoofer depth (without use of a seat lift): 4.5” (2.2cu ft)
-Maximum downfire subwoofer depth (with use of LMI 1920CB): 6.5" (3.1cu ft)
-Maximum upfire subwoofer depth (without use of a seat lift): 6" (2.5cu ft)
-Maximum upfire subwoofer depth (with use of LMI 1920CB): 8" (3.4cu ft)

-Storage "cubby" when running a single sealed subwoofer. Sizing of storage dependent on subwoofer being used.