Four SA-8 Box Tuning and Size

[bballstarx124x 10+ year member]

I'm in the process of designing a box for four SA-8s and I was looking for some recommendations for size. I remember Jacob saying something about .6 cu. ft. per sub but I wanted to get some more input. As for tuning, I was thinking somewhere around 32Hz. Any opinions on that? Its for daily only.

For port area should I stay between somewhere between 14-16 sq in/ cu ft or go bigger or smaller?

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[stangman67 10+ year member]

2 cubes at 32-35. Jacob recommends .5 cubes each across the board now, Especially if you are running lots of power. My box is 2.5 at 35 hz with 40 inches of port area. I would say the low end performance is pretty darn well tuned at 35hz, I really wouldn't go lower than 33

 

[bballstarx124x 10+ year member]

Ok thanks man.

 

[RAM_Designs 5,000+ posts]

2-2.25ft^3 at 33-35hz.

 

[TrlcKed_OuT 10+ year member]

yea itd say no more than 2.5ft^3...my four were in 3.6ft^3 at 32hz and it sounds great but the box is just too big!! when i build another it will be 2.25ft^3 at 35hz.....at 32 it gets low and still sounds great but i bet it would be even better around 34-38hz!!