Pioneer needs box

[Koty]

Thanks now I can start build the box.

[Koty]

So here is a suggestion, wood thickness is 19 mm, power: to sub(s) rated, amp subsonic filter to 28Hz, minimum port clearance 5 centimeters, figure is just an assembly guide:

NOTE: If building outside you need to build a cardboard dummy box to test fit in it's way inside.

Joe X

Is it right that is L port extension is long 44 cm?

[Joe X]

The figure above is just an assembly guide, here's a sketch done to your box dimensions:

44 cm is correct.