sub box design

I am in the process of building a sealed enclosure for 4 12" subs. I have planned on firing two strait back and the other two up. I'm afraid the two firing up toward the rear deck are going to create a lot of noise from the car. I was wondering if anyone had any better suggestions. should I build a baffle above the top two and fire them into the cab? Please help with your opinions.

I usually suggest firing all 4 in the same or near the same direction. Reson for this is if 2 are firing forward and 2 rear, they can actually cancel eachothers sound waves out and make ur system sound like monkey ass."Shiny chrome when used in conjunction with bikini models is particularly effective in inducing brain deficit disorder"

02 Jeep Grand Cherokee

Monster System on its way.

actually if u've ever been to a zoo, its that little squishy sound that the monkeys make when their pissed well, ok so I made that up but still, you got my point hehe."Shiny chrome when used in conjunction with bikini models is particularly effective in inducing brain deficit disorder"

02 Jeep Grand Cherokee

Monster System on its way.