4 subs, 4 boxes, and 1 carpenter looking for technical help

[DadMiller]

I have 4 subs in 4 cars and hoping someone is bored enough to help me revamp my box sizes. I don't have box building software, nor know how to use it. BUT I have my own wood shop and love to build. Currently all subs are in the manufacture’s suggested small sealed box. I’m wondering if I could be getting better/deeper bass in a slightly bigger box or even a small vented box?

For example, Alpine suggests a .45cf sealed. Is that just so consumers can use a very small box? Would a .6-.7 sound better? Or would bigger box tear up the driver? Or would it sound amazingly better in say a 1cf vented box? I"m just going off what I was told. The dealer said my Kicker 8 would be pretty boomy in a vented box... again, just what I was told.

Here’s what I have...

CompR 8: currently .5cf box 300w with amp
Fs 42.5 — Qts 0.739 — Qms 11.0 — Qes 0.792 — Vas 9.8  — Xmax 10.5

CompR 10: currently .9cf box 350w with amp
Fs 34.0 — Qts 0.516 — Qms 12.4 — Qes 0.538 — Vas 24.4  — Xmax 14

Alpine SWT-10S2: currently .45cf box with 300w amp
Fs 27.0 — Qts 0.41— Qms 3.73 — Qes 0.46 — Vas 44.4  — Xmax 11

Fosgate P3D4-10: currently .6cf box with 600w amp
Fs 28.0 — Qts 0.56— Qms 5.0 — Qes 0.63 — Vas 27.0  — Xmax 15.9

Thanks in advance.