For you subwoofer box Guru's

[platour22]

L X W X H = / 1728 / number of subs

Example with 2 subs:

49 x 21 x 30 = 30870 / 1728 = 17.86 / 2 = 8.93 cuft per sub.

This is non chambered. chambered box have to be calculated on both sides.

This is also sealed. If you wanted a ported box you have to determine what you wanted it tuned to ( 35hz) then calculate the port displacement.

 

[droppedHoe]

L X W X H = / 1728 / number of subs

Example with 2 subs:

49 x 21 x 30 = 30870 / 1728 = 17.86 / 2 = 8.93 cuft per sub.

This is non chambered. chambered box have to be calculated on both sides.

This is also sealed. If you wanted a ported box you have to determine what you wanted it tuned to ( 35hz) then calculate the port displacement.

after having some pros tell me how to calculate box volume and showing me using a app, i found out the re calculator is a little off, but as much as 7hz off too. thats not good when i want a box tuned to 38hz and it may end up as high as 45hz.

be sure to calculate wood thickness too
so if the box is 49L, internal volume is really 47.5. thats if each side is 3/4 mdf. if its thicker, you have to calculate that

 

[killer20072001]

Whew I was thinkin that was gonna be one tall ass box. Thank you guys for your input its all very helpful. That link that lilsolo68 posted has a calculator for port tunning, and yes I plan on putting in a port was gonna go with 3/4 mdf also.

 

[lilsolo68]

Whew I was thinkin that was gonna be one tall ass box. Thank you guys for your input its all very helpful. That link that lilsolo68 posted has a calculator for port tunning, and yes I plan on putting in a port was gonna go with 3/4 mdf also.

glad i was able to help. post up build pics of the box and the end results