Sidebar

is a 4" port enough for a 12" bm???

Reply
Jump to latest
~Magick_Man~

~Magick_Man~
10+ year member

CarAudio.com Veteran
2,261
0
bedford,Tx
i am building a box tomorrow and it turns out i have the room to make it a ported box so i want to go that route.

the box will house 2 12" si BM's

there is no good area to place 2 ports next to each other so i am planning on seperateing the 2 subs and each chamber will have a 4" pvc port

does this sound like it would work?

i will have some pictures of what i am trying to do in a little while

Thanks,

~Magick_Man~

Click to read more...
 
here is the basic idea i have right now.

it might change a bit but that is pretty much it.

iso1.jpg


iso2.jpg


iso3.jpg


iso4.jpg


so if i dont make 2 seperate chambers will the subs really utilize the area in the middle?

Thanks,

~Magick_Man~

 
you need double that port area.

have fun trying to make it fit //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 
you need double that port area.
have fun trying to make it fit //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif
Click to expand...
//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

i am using a port calculator and for 2 4" ports in a 2 cube box tuned to 34 it says they need to be 26.xx"

is that each?

if it is then that *****.

because i can fit in up to 14" long ports.

would i be better off with 2 3" instead of 1 4" ?

~Magick_Man~

 
did yo use those port tubes on NoLimits box?
Click to expand...
no i used a mdf slot port on his.

i am trying to stay away from that on this box because i dont want to mess with angling the port like it is on your box.

and i have a ton of 4" pvc pipe so i might as well use some of it.

~Magick_Man~

 
um, what's the volume of the box (after displacement) and how long are the ports?

adding two ports like that (and keeping them the same length) is going to make the tuning A LOT higher (10hz +) possibly.

 
um, what's the volume of the box (after displacement) and how long are the ports?
adding two ports like that (and keeping them the same length) is going to make the tuning A LOT higher (10hz +) possibly.
Click to expand...
i dont have the exact number yet but i have about 2.2ish per driver after the port is taken out.

i was looking at a single 4" at 11.xx" long which would supposedly give me 34hz with a 2cube box

now i am looking at 2 10.12" long with 2cubes after displacement which should give me ~36hz

i will end up with as close to 2.0 per chamber after the port and sub is taken out.

~Magick_Man~

 
yeah, thats probably not going to work... the port calc is EACH port, so adding more is just making your problem worse
Click to expand...
yeah i figured that.

i was using one at 11.xx long shooting for 34hz

now i am using 2 at 10.12 (i think) shooting for 36hz

~Magick_Man~

 
so i guess the real question is will 2 4" ports 10.14" long in a box 2.0 cubes after displacement give me a 36hz tuning?

i am judging this off the port calculator from carstereo.com

~Magick_Man~

 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.
Previous topic Next topic

Similar threads

Justin Salaro
Bass port recommendation
Yeah, saw that too, was like ??? wtf! They do know there stuff, I usually just roll with it!
13
867
Subwoofers
Doxquzme
Doxquzme
Manu
Modify port enclosure
You could try to make the port longer, but there might be other reasons with the box won't extend lower, or even the sub. You'd have to reverse...
3
567
Enclosure Design & Construction
Buck
Buck
JuiceTin
Internal Volume and Port tunning+Area
While that program is pretty neat, it assumes you know the values. I was just recapping the numbers you provided. RS recommends the following...
4
726
Enclosure Design & Construction
Doxquzme
Doxquzme
M
Dual 10" front face slot port in making
Whoa, that will be one skinny port. The width of the back wall ports will be 1.08" wide (27.5mm), but the front port will be shared by 2 subs so...
5
707
Enclosure Design & Construction
1aespinoza
1
Ridinhi
Will this be enough port?
Yup. That is the bread truck that Richard Clark built for MTX many years ago . 60 inch subwoofer. The problem was that the truck wasn’t...
14
2K
Enclosure Design & Construction
dragon.breath
dragon.breath

About this thread

~Magick_Man~

~Magick_Man~

10+ year member
CarAudio.com Veteran
Thread starter
~Magick_Man~
Joined
Location
bedford,Tx
Start date
Participants
Who Replied
Replies
32
Views
1,567
Last reply date
Last reply from
~Magick_Man~
Share thread
IMG_0632.jpg

just call me KeV

    Apr 19, 2024
  • 0
  • 0
IMG_0629.jpg

just call me KeV

    Apr 19, 2024
  • 0
  • 0

Latest topics

Top
Menu
Home
Refresh