Internal box dimension calculations

[AcidicDreams 10+ year member]

Ok I think I've got this right. I'm calculating the internal dimensions of my next box... here's how I'm doing it

External dimensions in inches. 32lx38wx15h which is 30.5x35.75x13.5 after accounting for the MDF on the outside of the box and one divider/brace in the middle. So this equals:

14720.0625 cubic inches... now divide that by 1728 to get cu ft

8.51 cu ft, divide by 2 so we get each drivers chamber

4.26 - driver displacement of .15

4.11 - bracing (.0373cu ft per brace, 2 per driver + rounding off for extra bracing I might throw in) .10cu ft = 4.01

so total internal air space per driver in a 32x38x15 box would be 4.01cu ft... correct?

Click to read more...

 

[DaGh0st 5,000+ posts]

dont forget to take an extra .75in of wood away from the internal for the middle pannel

 

[AcidicDreams 10+ year member]

I took it from the width part.... I'm using lxwxh like it's in my vehicle so w is actually the largest... 38w - 3(.75) = 35.75

 

[DaGh0st 5,000+ posts]

ok just to make sure i understand you with is 38 -.75 (outside wall 1) - .75(outside wall 2) -.75 (inside divider)

 

[AcidicDreams 10+ year member]

ok just to make sure i understand you with is 38 -.75 (outside wall 1) - .75(outside wall 2) -.75 (inside divider)

yah...

 

[AcidicDreams 10+ year member]

anyone care to say yes or no? I just want to make sure I've got the general idea... just looking for someone to do a quick check...