I have a 12'' Alpine type r, swr-1242d dvc sub. Alpines website suggested .75-1.75 cubic ft box for a slotted port at 33hz tuned.

They gave these external dimensions 18x13.5x16.5 and after vent and sub displacement the internal gross volume would be 1.7 cubic ft.

The vent length they give is 22.75'' with no height so I am assuming the height will be the internal height of the box. They also do not give the width of the port, or I might just not understand the part that specifies it.

My question is this, is 1.7 cubic ft tuned to 33hz gonna be perfect for this sub? I see other boxes on here tuned to 32-34 hz and they are over 2.0 cubic ft. I here a lot of people talking about slot ported boxes being bigger and better.

If anyone has any advice or a blueprint for this box or a box that will work for this sub I would greatly appreciate it.

It will be going in a 2000 VW VR6 powered by an ALPINE MRP-M500 at 2ohms 500 watts rms

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