Alot louder with door open, not enough port area?

[wenn_du_weinst 10+ year member]

Technically it is a very poorly sealed 6th order, but only with you sitting inside the ''enclosure''

That does not mean you can how ever model your car/system as a 6th order to see what will happen.

 

[RangerDangerV2 5,000+ posts]

Exactly //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Ignorant people so quick to say I'm wrong.
Yes in effect your car is working as a 6th order bandpass.. Some cars work but not all cars.. If you get louder with windows open in effect it's a 6th order.

still wrong. read wdw's post.

 

[RangerDangerV2 5,000+ posts]

[quote name='wenn_du_weinst']wow a ton of wrong info on here.

I think @Kangaroux is the only one I saw that got it right.
It's not your windows acting as a port, it's not your cabin acting like an enclosure. It is all to do with wave lengths and phasing. A full length bass wave is much longer then the distance from your subwoofers to windshield. This causes it to double back, and go back forward again, until it reaches maturity and loses strength. This Causes it to become 180 degree's out of phase with the forward moving wave canceling each other out. Opening your windows lowers the amount of the bass waves coming back at the source as it lets them escape out the window. It is 100% to do with cancellation, once you get the perfect alignment between the subwoofer and listening area you are golden. Have you ever noticed that even with very low scores that HT subwoofers are much louder to the ear? That's because they don't suffer the same problem as an in car sub.[/QUOTE]

how does one accomplish this??

 

[Julian 10+ year member]

I am i Still wrong? It is in-effect working as a 6th order..

 

[wenn_du_weinst 10+ year member]

how does one accomplish this??

Ask a burp car guy, testing and testing, and then more testing.

I am i Still wrong? It is in-effect working as a 6th order..

like I said before, technically but not a very good one and you would be inside the 2nd chamber.

 

[Blue Fury 10+ year member]

Technically it is a very poorly sealed 6th order, but only with you sitting inside the ''enclosure'' That does not mean you can how ever model your car/system as a 6th order to see what will happen.

Right, I'm not saying it's exactly, just close to. But the effect is still there. I don't know enough on the long wavelength % change when the longest path (rear to front windsheild) changes to rear to effectively infinite length with the door open so I left that alone. Same with cancellation.. idk the degree to which it's affected at what % or area that opens up from doors or windows. I'm not sure anyone does unless he/she has some substantial acoustical engineering education.

 

[wenn_du_weinst 10+ year member]

I have a general understanding on the subject. It's not all that difficult to understand but it's not really needed to know it.

 

[Blue Fury 10+ year member]

I have a general understanding on the subject. It's not all that difficult to understand but it's not really needed to know it.

Lol you said it. When I was balls deep in this hobby, I started to learn about it but stopped because I couldn't imagine a time where I would need to build an enclosure for myself that took all of this into effect when no one is paying me to do so.

 

[JoshC 10+ year member]

So that means i need to switch to 2 10s with slot port and open my amp up the rest of the way to hear a decent change

 

[Blue Fury 10+ year member]

Model them both with the linkwitz transform on winISD to find your theoretical change. I wouldn't waste my time if it doesn't even increase 3db. Then again, it's theoretical change.

 

[JoshC 10+ year member]

Model them both with the linkwitz transform on winISD to find your theoretical change. I wouldn't waste my time if it doesn't even increase 3db. Then again, it's theoretical change.

I dont see how more cone area and more power wouldnt yield more db. Ill let my builder run the programs lol, possibly contact ram_designs for some prints. But i just saw vegafans old schools RE 10s for sale. 3in VC and Fs of 26.6 //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif

 

[Blue Fury 10+ year member]

I dont see how more cone area and more power wouldnt yield more db. Ill let my builder run the programs lol, possibly contact ram_designs for some prints. But i just saw vegafans old schools RE 10s for sale. 3in VC and Fs of 26.6 //content.invisioncic.com/y282845/emoticons/yumyum.gif.0556df42231b304b9c995aefd13928a8.gif

It should result in higher spl but I don't think that the small gain will be worth the effort.

It's too bad you can't fit the Xcons and box I have for sale in your truck. They'll massage your nuts nicely

 

[Julian 10+ year member]

It should result in higher spl but I don't think that the small gain will be worth the effort.
It's too bad you can't fit the Xcons and box I have for sale in your truck. They'll massage your nuts nicely

How will 8 xcon 10's massage my nuts?

:lol:

8 in my car... team ssa ftw