PDA

View Full Version : RE calculator help

Unfortunate
03-17-2009, 09:00 PM
edit: everyone here says use winisd but i can't figure that **** out.

Anyone want to help me out here?

bonesninja estimated .65 cubes displacement

that's for baffle/ 4" aero ports / subs

Going with whichever enclosure is smaller that will work

(ROUTE 1)

According to the psp calculator to fit (2) 4" ports i would need atleast 20in of length to the back wall for clearance which pushes me to 3.6 cubes and 3 cubes after displacement.

(ROUTE 2) 3 cubes slot port box with about 2.5 cubes after displacement. ((40^in of port))

Any good box designers you'd suggest to figure this out because i do need a design and cutsheet today

mobileaudio219
03-17-2009, 10:51 PM
what do i enter for square port width / length

trying to build a box that's 3 cubes gross so about 2.5 net after sub/port displacement.

How do i go about doing so? anyone want to help with dimensions along the times of

30 width
13 height
?? depth

40 sq in of port tuned to 38 hz *

The re caculator isnt very accurate, I'd use winISD if I were you!

DonH
03-17-2009, 11:17 PM
the best calculator is you brain!

schackel
03-17-2009, 11:30 PM
the best calculator is you brain!

definatly not!
what is the integral of xsin(2x)????
ya try calculus butt hole!

schackel
03-17-2009, 11:30 PM
what is winISD

GAM3OVR
03-17-2009, 11:34 PM
what is winISD

Just about the Best Thing EVAR!

DonH
03-18-2009, 12:20 AM
definatly not!
what is the integral of xsin(2x)????
ya try calculus butt hole!

ben there done that bro!

also bolded lettering...Real mature haha how old are you 12?

also your brain being the best calculator is oh so true my friend!! every second you calculate. YOu calculate to opt to pick up a scientific calc. you c where im going with this??

seriously thou WinIsd is TEH ****! haha

ascitiesburn69
03-18-2009, 11:42 AM
definatly not!
what is the integral of xsin(2x)????
ya try calculus butt hole!

Integral of xsin(2x) is -(X/2)cos2x + (1/4)sin2x + c

I think......my brain hurts now....

Unfortunate
03-18-2009, 01:02 PM
Integral of xsin(2x) is -(X/2)cos2x + (1/4)sin2x + c

I think......my brain hurts now....

no, e = mc^2 ?

9BlackN*Black6
03-18-2009, 01:48 PM
Yea, I tried to use winisd when I built my box, didnt like it, I think its very poorly/confusing designed software and the re calculator is much easier to use.
As far as it being inaccurate, Im not sure how punching in 2+2 on one calculator is any different than putting it in on another one.

Anyways back to your box, what is your total sub(s) displacement?

Unfortunate
03-18-2009, 01:51 PM
Yea, I tried to use winisd when I built my box, didnt like it, I think its very poorly/confusing designed software and the re calculator is much easier to use.
As far as it being inaccurate, Im not sure how punching in 2+2 on one calculator is any different than putting it in on another one.

Anyways back to your box, what is your total sub(s) displacement?

bonesninja estimated .65 cubes displacement

that's for baffle/ 4" aero ports / subs

Going with whichever enclosure is smaller

(ROUTE 1)

According to the psp calculator to fit (2) 4" ports i would need atleast 20in of length to the back wall for clearance which pushes me to 3.6 cubes and 3 cubes after displacement.

(ROUTE 2) 3 cubes slot port box with about 2.5 cubes after displacement. ((40^in of port))

Any good box designers you'd suggest to figure this out because i do need a design and cutsheet today

9BlackN*Black6
03-18-2009, 02:01 PM
Sounds like you got the right idea w/ slot ported, what are you lookin for as far as tuning? Again what is your subs(just subs) total displacement, you dont need to know the baffle/port size that will vary depending on how big the box is. Im working right now but ill try to help as much as i can.

Unfortunate
03-18-2009, 02:09 PM
Sounds like you got the right idea w/ slot ported, what are you lookin for as far as tuning? Again what is your subs(just subs) total displacement, you dont need to know the baffle/port size that will vary depending on how big the box is. Im working right now but ill try to help as much as i can.

Thanks appreciate it.

(2) dd 1510's (displacements = .216 cubic ft total)

baffle = 11.5 x 28.5 inches (3/4" mdf)

Tuned to 38hz

9BlackN*Black6
03-18-2009, 02:25 PM
Ok got your box, type this in the re calculator. W=30 H=13 D=17.5(top and bottom depth) Port Width=3.5 Port Length 2=6.25......you get 38.076hz....this help?

Unfortunate
03-18-2009, 02:40 PM
Ok got your box, type this in the re calculator. W=30 H=13 D=17.5(top and bottom depth) Port Width=3.5 Port Length 2=6.25......you get 38.076hz....this help?

perfect!

thanks bro