Box for 4 JL 8" W7's

[xXxKUMQUATxXx]

Hey guys, so I want to get 4 JL 8" W7's but i'm limited on space, this is the box (link here) I have been looking at. Is this box going to hit hard? Should I have one custom built? If these 8's aren't i'm going to get an additional 12" W7

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[Jroo 10+ year member]

I assume since you are looking at an under seat truck box, you have a truck. Are you trying to run 4 8's and a 12"? Either way, a custom box is always going to be better than a generic box that looks like it was built for kicker squares sealed. If you are limited on space, W7s arent the sub to be looking even in the 8". They are a pretty deep speaker and the box that i have heard when the sound best were larger ported, like up to a cube ported on a single 8".