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So I'm building a common chamber box for two of the new Alpine R series D4 12" subs and wanted to know what you guys think. I believe it's all planned out to recommended specs but I didnt have any 3/4 laying around so I'm just using some 5/8 MDF

Here are the specs

32Wx15Hx16D

For an internal volume of 3.4cf after woofer displacement of .1 per sub (so .2 total) but before port displacement which I'm having trouble calculating..

Port is 3.25W (3-1/4) for 14.5" from the front of the box towards the back and splits to each side at 1.63W (1-5/8) for 11" for a total port length of 25.5"

It should be tuned at 35Hz I believe

Does this sound correct?

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26 minutes ago, W3BL4Z3D4NK said:

But are the specs good? Haven't glued it yet just wanna get some input first. 

Specs are off. I'm getting 2.86ft³ before woofer displacement. 

32x15x16

Port would be 13¾x 3.25x25.5

2 common port walls ( center port) 

.625 baffle

.625 port thickness

.625 material

=3.61 gross volume 44.69 port area, 15.62 port area/foot

Net volume 2.86ft³ before woofer displacement. 

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22 minutes ago, DiBo said:

Specs are off. I'm getting 2.86ft³ before woofer displacement. 

32x15x16

Port would be 13¾x 3.25x25.5

2 common port walls ( center port) 

.625 baffle

.625 port thickness

.625 material

=3.61 gross volume 44.69 port area, 15.62 port area/foot

Net volume 2.86ft³ before woofer displacement. 

Okay well they call for 1 to 1.5cf per sub so that's still within specs tho at 1.33 each after woofer displacement. Should be good right? Port and tuning sound correct? 

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