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Ported box design for 2 Alpine typr R 12 (1242d)


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could you make a cut list for a 5 3/16" port tuned to 33 hz? Do you tihink that it will be loud if i do that?

I tried to make the port wider but the port becomes too large. So this is an alternative but I need to tell you how the port parts have to be cut:

fix.jpg

Also let me know the length of that panel with a question mark -- be aware that the port has to be perfectly in the center for this to work so the left front and the right front panels must be identical in length.

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oops sorry, i meant to say that the front panels are are 15 7/8" i honestly have no idea about how i mis measured and cut it to this length, but does that help you out a little more?

Ok take a lot of care with future measurements, regarding your issue you can repeat the front panels which is best or do this:

fix3.jpg

Just take the center (18 1/2") , cut and place the port parts as shown, the full spec of the parts is as follows:

Shared Port Internal Assembly Parts:

2 x Front to Back = 18 x 12 1/2

2 x Extension = 3 3/8 x 12 1/2

In this case the port must be 4 1/2", since your parts don't fully fit I placed some 45s there to reinforce the corners.

If you have any other questions let me know.

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