Questions for tuning a box for 2 12in Kicker L3 Subs

[Mustang563]

I need some help in making a box for 2 12 inch Kicker L3 subs. The box is going to be in a 2005 to 2007 V6 Mustang so I am putting the subs facing up so it will easily fit.

Specs for 1 of my Kicker L3 square subs

2ohm, 800 watt max, 400 rms, 31.37 Hz, 86.3 sensitivity, QMS 9.198, Qes .796, Qts .733, Hole cut-out diameter 11-1/16 inches, mounting depth 6-1/4 inches.

My box dimensions I thought sounded good are Height 9 inches, Width 32 or 34 inches, Depth of 16 inches. The 2 square subs would be on top and they would be facing up. My question is how and where should I port it so my box is tuned to about 31 Hz? I usually listen to rap if that helps at all.I don't have much experience building sub boxes and I need all the help I can get. Thank you!

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[mklett33 10+ year member]

Do subs and port facing backwards. This sticky thread should help you, read through it, and let me know if there are any questions.

http://www.caraudio.com/forums/enclosure-design-construction-help/560833-about-make-thread-about-box-design-read-first.html

Your box volume looks on target but I think you would have trouble with the design by only going 9 inches tall. There would be enough depth for the speakers but Im not sure how you would ever fit a slot port in with the orientation you are mentioning. Thus why I suggest going 15 tall, as wide as the trunk will allow and use the depth as your variable dimension that you adjust based on the volume you need.