HELP! part 2

[Bggd_GMC 10+ year member]

How many subs are you using? That port area is small for one sub already if you are going to try and use more then you really need to open up that port.

everything i posted was for 1 sub in its own chamber.... im doing 2 subs in there own chamber with a 1.75 port each

 

[pro-rabbit 5,000+ posts]

everything i posted was for 1 sub in its own chamber.... im doing 2 subs in there own chamber with a 1.75 port each

Try and do a single port if you can. Also what is the over all size of the port?

I personally wouldn't use a 1.75 wide port unless it was 100% necessary.

 

[Bggd_GMC 10+ year member]

Try and do a single port if you can. Also what is the over all size of the port?
I personally wouldn't use a 1.75 wide port unless it was 100% necessary.

what about 3.5cf after all displacements single chamberd with a 3" wide port tuned to 30hz? theres pics in the 2nd page

 

[Bggd_GMC 10+ year member]

anyone >_

 

[Bggd_GMC 10+ year member]

......

 

[Bggd_GMC 10+ year member]

just need a confirmation and ill get to building

 

[pro-rabbit 5,000+ posts]

Looks good, but how far is the T part of the enclosure from the back wall? And if you could, I would try to get a 4" wide port if the length and displacement is not to much for your space.

 

[Bggd_GMC 10+ year member]

Looks good, but how far is the T part of the enclosure from the back wall? And if you could, I would try to get a 4" wide port if the length and displacement is not to much for your space.

the port is also 3.5 from the back wall... ill see if i can mess with a 4in port

 

[pro-rabbit 5,000+ posts]

It needs to be half the width from the back wall when you do a T port like that. If you do a 4" that puts the back part 2" from the back wall which is what I would shoot for in your build.

 

[Bggd_GMC 10+ year member]

It needs to be half the width from the back wall when you do a T port like that. If you do a 4" that puts the back part 2" from the back wall which is what I would shoot for in your build.

like this??? i dont think the 4in port will work lol

 

[pro-rabbit 5,000+ posts]

On the 4" version you have to turn the end to come back forward to keep the 2" width available. Also are you dividing out the remainder of the port length(When the T starts) correctly? Looks like you are just putting each side to the full length.

 

[Bggd_GMC 10+ year member]

On the 4" version you have to turn the end to come back forward to keep the 2" width available. Also are you dividing out the remainder of the port length(When the T starts) correctly? Looks like you are just putting each side to the full length.

so how would i do that??? port length is 55.5" so 13.5 deep and 21" for each side 13.5 + 21 +21 = 55.5

 

[pro-rabbit 5,000+ posts]

What are the dims on your enclosure you working with? Let me check what you have and I will let you know.

 

[Bggd_GMC 10+ year member]

what are the dims on your enclosure you working with? Let me check what you have and i will let you know.

15h, 14.25d, 50.75w

 

[pro-rabbit 5,000+ posts]

I'm only getting 4.9 gross. Can you go any larger? Just a bit to 5.2-5.3(ish) gross. Port would be 13.5 x 4.5 and 27-28 long depending on tuning.

When you get to the back of the enclosure you subtract your port you already have so you have a total of 27" needed. If you stay with 14.25 deep you would have a 10.5 length. So you still need to create another 16.5" of port. Being that your port would be 2.25" from the back wall you divide your 16.5 by 2. This gives you 8.25 per side you need for length.

And that is my free design/lesson for the week haha.