Kicker L7 15 enclosure question.

[devil4u2c]

Okay so I will be starting a build pretty quickly and I am wondering where to start. Basically I dont have alot of experience with L7's and need some input. I am putting an L7 15 into a fiberglass enclosure, and a buddy of mine told me that I should build it to around 4.2 CF and tuned to around 34 hz. He said that is their sweet spot.

Anyways I am just wondering what anyone else has to say on it. I am putting it where my back seat used to be, so air space should be no problem. I will be running a ppi pdx 2200 to it for now. So basically the question is for one L7 15 how large of a box would you do and how would you tune it for daily grinding (aka music)