Zenclosures 2021+ Hyundai PORTED Elantra Subwoofer Box Manufactured in the USA by ZEnclosures Mounting Hole cutout for 15" Sub(s): 14 1/8" Mounting Hole cutout for 12" Sub(s): 11 1/8" Mounting Hole cutout for 10" Sub(s): 9 1/8" Subwoofer Mounting Depth: 9.00" Airspace Volume: 1.80 cubic ft. Per Subwoofer/Chamber Entire Box Made with 3/4" MDF Speaker Wire Terminals Located on Sides of Box: 1 Per Subwoofer Box Type: PORTED Box Finish - Carpet Subwoofers & Amps Not Included