4 sundown e8v3s in 01 silverado.

[Synastr]

Ok so I'm I'm building a box to house 4 sundown e8v3s. Currently I have 2 subs but am getting to more later. So my first question.

Since I only have 2 should I baffle the box for 2 per chamber and port each side? Or make it one chamber/ one port. And cut out two other holes later?

Next question, I've going round port but I'm unsure if I'll need a 3 or 4 inch port and if I need one long one or two shorter ones. I plan on tuning at 28-32hz I want it to be SQL.

Final question, with these subs, should I build the box as big as possible for the most airspace? Or is there a sweet spot for these. The box will be under the seAt and forward firing.

Thanks again.

If it matters, it'll be dual 2ohms wired to 1ohm on my ampere audio 1000.1

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[Synastr]

So I've done some measurements and it looks like I can get about 2.6 cft before subs and port. So what size port would be best? 4 or 5? It will be round and firing towards a rear door. Or would it be better to run adjacent ports since it's a four door truck and if so, what size then?