Good Design?

[kfx450r 10+ year member]

This box is for 2x 15" Fi SSD's i want it to slam. Going to be pushing atleast 800watts to each sub.

Box is as follows:

9.15 cu ft after sub displacement but before port.

Wedge box 48" wide, 26" tall, 20" bottom depth, 12" top depth.

4x 3" diameter pvc tubing cut to tune to 35 hz. which will be mounted at the top of the box coming to 130 cu inches of port area.

Click to read more...

 

[kfx450r 10+ year member]

Heres my first google sketchup attempt. This is how i plan for it to look.

 

[thegreatestpenn 5,000+ posts]

you need WAY more port area. try 4" ports at least instead of 3"ers

 

[kfx450r 10+ year member]

you need WAY more port area. try 4" ports at least instead of 3"ers

scratch

 

[mazdakid 5,000+ posts]

4 3" ports is nowhere near 130" of port area

4 6" ports wouldnt even be that much

 

[kfx450r 10+ year member]

4 3" ports is nowhere near 130" of port area

how do i accuratly calculate port area with pvc

 

[dappa5 10+ year member]

what is this thing going in?

 

[kfx450r 10+ year member]

what is this thing going in?

ext. cab colorado truck. What if I did a slot port 19" wide, 6" deep and 9" into the box for 35hz. would that be enuff port area. I dunno how to calculate t i just did length times height came to like 170. Calculator says for these 2 i need 150 ish port area

 

[dappa5 10+ year member]

slot port will do you right and usualy it's 12-16 in sq per cu ft so hats you total cubes?

 

[kfx450r 10+ year member]

slot port will do you right and usualy it's 12-16 in sq per cu ft so hats you total cubes?

the box is 9.15 cubes counting the subs displacement but not the port displacement. Fi says 3.5-4 for each ported so i shuld be good even after port displacement

Guess i need a little less port if its 12-16 cuz 170 would be 18. 18"x6" port that goes 8.39" into the box would be 151 sq inches i think? at 35 hz.

 

[dappa5 10+ year member]

tht is still to big you only need 12-16sq in per cube so 9.15 x 16 =54.9 sq in tht box is massive i 'd try 6x 12(72 in sq) using the rear wall as rear of port (to cut down on displacement) adjust length to appropriate freq

 

[kfx450r 10+ year member]

tht is still to big you only need 12-16sq in per cube so 9.15 x 16 =54.9 sq in tht box is massive i 'd try 6x 12(72 in sq) using the rear wall as rear of port (to cut down on displacement) adjust length to appropriate freq

9.15 x 16 is like 146

 

[dappa5 10+ year member]

srry

meant try 9x 18

 

[mazdakid 5,000+ posts]

your 19x6 port would be 114" of port area.

 

[93dakota 10+ year member]

how are you calculating the port length. If i got the right numbers with the port being tuned to 35hz and having a port of 18x6 your port would need to be closer to 17 inches not 8.