Got 2 box designs to choose from and need some help.

[Syphlyn]

Finally got my two box options done. The box is going in the rear of my 2000 f150 extended cab truck with the sub/port both firing up. The Zv4 12 will be running off my SAZ-2000D.

Box Number 1

Box Number 2

Box 1 is 2.5 cubic feet tuned to 32hz

Box 2 is 2.8 cubic feet tuned to 30hz

Both have very similar port area, within 0.2 sq inches/cubic foot of each other. Only difference really is the height and the tuning. The first box sits 3 inches below the rear window line, while the second box sits right at the rear window line.

Which one should I use? Will I run into any issues with the second box being closer to the roof?

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[skdooley 10+ year member]

2.5 will be plenty on the power it'll be seeing.