So i made an earlier thread and decided to just make a single larger aeroport.
originally it was a puny 4" with a shit rigged set up.
so i went to Lowes and picked up a 2' tube of 6" PVC pipe and here's the difference.
now the green PVC is just the left over pipe and the rest is of course installed.
i had a 40"x16"x16" box, and a gross with displacement an overall ~4.5ft^3 box.
now with that puny 4" this called for a 4"x~4.5"(35Hz) aeroport. this was horrendous with port noise and low output.
i changed out to the 6" which called for a 6"x~14.5"(32Hz) aeroport and it made a world of difference.
it was much louder on lower volumes, and before i could only feel the bass in my hands when they were vibrating with the rest of the car.
with the 6", i can literally feel my throat caving in(not really) and my ears having sharp pain.
now this was just a box upgrade(doing the Big 3 upgrade with 0AWG and a Kinetik HC1800) but it was felt almost twice as loud!!