Box Specifications Fits 2008-2016 Infiniti G37 & Q60 Coupe Hole cutout for 8" Sub: 7 1/8" Hole cutout for 10" Sub: 9 1/8" Subwoofer Mounting Depth: 8.25" Total Airspace: 1.00 cubic ft. Made with 0.75" MDF Speaker Wire Terminals: 1 Per Subwoofer Box Type: Sealed Box Box Finish - Carpet Installed Pictures Shown in Charcoal Grey Subwoofers & Amps Not Included Hole Cutouts adjustable per request Airspace for a single sub can be made from 0.50-1.00 cu. ft.