The 13 inch sub boxes for JL audio subs will give you the perfect box for the W6 and W7 subwoofers. These boxes are made to perfectly fit JL's unique 13" subwoofers which give you the best qualities of a 12 and 15 inch subwoofers. The 13 inch subwoofer from JL Audio gives you the output of a 15 inch woofer, with the sound quality of a 12 inch subwoofer.