2018 GMC Sierra Crew Cab 2 Massive Audio Hippo 8s underseat subwoofer box plan

 
 
Subwoofer Box Plans for 2 Massive Audio Hippo 8s
Save Money! Build Your Own Subwoofer Box. These subwofer box plans are perfect if your looking to DIY! Plans make it a breeze! Dont waste Materials! Get BANGIN BASS!
Included- 
Downloadable Zip File
Multiple 3-D Rendering Images 
Specs sheet W/ Subwoofer and Enclosure Specs 
Professional Optimized Cut Sheet W/Parts List

Designed for 2 Massive Audio Hippo 8s
Outside Dimensions-FH10” x RH6” x W52” x D15”
Enclosure is Based on Reccomended Manufature Specs
*May work for other 8"woofers, user caution advised*