Square Single 15 Inch Vented Subwoofer Enclosure - $69

Features:

• 15 inch subwoofer cutout
• Vented
• 21" x 15.75" x 18.75" (WxHxD) 
• Air space = 1.75 cubic feet
• MDF Construction 
• Premium Grade Terminal Cups
• Charcoal Carpet