HiFi Vector Adapter spacer ring for American Bass HD 12" Subwoofer V2 & V3.
 
This is a custom made 3D printed adapter ring to use with the American Bass HD 12" subwoofer. This subwoofer has a larger mounting hole and will NOT fit into a 11"to 11- 1/4" standard cutout. This adapter makes it fit into the smaller box hole without cutting your box.