please help wit box

[fast85_gt 1]

i have 2 18" treo ssx's my box now is 9.99cf gross with a 100sqin port port is 4x25x21.5 deep after all dissplacements im at 7.68cuft treo reconmends 8cubes after dissplacment im doing a 150.7db at 34hz burp with 1 rd audio d9 amp but can you help me with my new box i plan on keeping it 8 cubes net but what can i do with the port to get more spl but still play low notes and keep it a dailey driver here is a link to treo ssx page click on the view specifications at the bottom of this page for the specs treo web site im running the amp at .5 ohms and this is a hatchback car im doing subs up port back please help me out thanks

[Duran 387]

Increase port area, about 120 sq. inches is the largest I would go though.

[fast85_gt 1]

Increase port area, about 120 sq. inches is the largest I would go though.

so i can go with 8cubes after diss, and 120sqin of port do i keep it 21.5" deep or shorten it? thanks for the fast reply

[Duran 387]

Increase port area, about 120 sq. inches is the largest I would go though.

so i can go with 8cubes after diss, and 120sqin of port do i keep it 21.5" deep or shorten it? thanks for the fast reply

What are all the dimensions for your enclosure?

[fast85_gt 1]

Increase port area, about 120 sq. inches is the largest I would go though.

so i can go with 8cubes after diss, and 120sqin of port do i keep it 21.5" deep or shorten it? thanks for the fast reply

What are all the dimensions for your enclosure?

the inside mess, is 14.5h x 34.5 wide x 34.5 deep and the port is 4 x 25 x 21.5 deep this is now but with the new box im going with the 120 sqin of port

[Duran 387]

You'll want to make the port 5" x 24" x 30" long for your 120 sq inches and a tuning of 34 HZ.

[fast85_gt 1]

You'll want to make the port 5" x 24" x 30" long for your 120 sq inches and a tuning of 34 HZ.

i dont think i can ues 5" tall port but i can do 4"x30"x21.5deep should be around 35hz or so and 8 cubes net will this be a good box

[Duran 387]

You'll want to make the port 5" x 24" x 30" long for your 120 sq inches and a tuning of 34 HZ.

i dont think i can ues 5" tall port but i can do 4"x30"x21.5deep should be around 35hz or so and 8 cubes net will this be a good box

That sounds good, I just checked the numbers, go for it.

[fast85_gt 1]

You'll want to make the port 5" x 24" x 30" long for your 120 sq inches and a tuning of 34 HZ.

i dont think i can ues 5" tall port but i can do 4"x30"x21.5deep should be around 35hz or so and 8 cubes net will this be a good box

That sounds good, I just checked the numbers, go for it.

thanks for all your help bro

[Duran 387]

You'll want to make the port 5" x 24" x 30" long for your 120 sq inches and a tuning of 34 HZ.

i dont think i can ues 5" tall port but i can do 4"x30"x21.5deep should be around 35hz or so and 8 cubes net will this be a good box

That sounds good, I just checked the numbers, go for it.

thanks for all your help bro

No problem Bobby.

[KU40 173]

Do those 18s really like having only 3.7 cubes per sub? If you increase the box size the system will become more efficient.

[fast85_gt 1]

Do those 18s really like having only 3.7 cubes per sub? If you increase the box size the system will become more efficient.

with the new box it will be 4 cubes per sub after all dissplacments and right now they are at 3.7 or 3.8 cube thats why im building the new box this was my first box and some how i did not include the .60 displacment for the subs

[KU40 173]

What size does the manufacturer recommend? I've never seen an 18" recommended for less than 5 cubes per sub.

[fast85_gt 1]

What size does the manufacturer recommend? I've never seen an 18" recommended for less than 5 cubes per sub.

its on the treo website the ssx's dont requier alot of cuft per sub