Absolute USA PDEB10BK Dual 10-Inch, 3/4-Inch MDF Twin Port Subwoofer Enclosure with Black High Gloss Face Board Dual 10", 3/4" MDF Twin Port Subwoofer Enclosure with Black High Gloss Face Board Dual 10" 3/4 MDF Dual 10" Slot Ported Subwoofer Enclosure, 3/4" MDF