how big of port holes for a big box for 4 15" cvrs in a jeep grand cherokee

[kickercvrboss]

I'm building my box out of mdf I got it all cut out now time for the port any ideas going by inches

[SnowDrifter]

You didn't plan for the port?

[n8ball2013]

You may want to just stick those pieces on the scrap pile.

[CJ18]

Wasnt there a video awhile back with a kid showing off his shit and saying that him and his dad cut some "port holes" in the box so it would hit harder?

Scrap whatever you already cut and learn how to design a box the right way and then start over.