Need help designing 1st 4th order

[SicAudio 5,000+ posts]

yes Ryan does great work. big fan of his.

I myself prefer doing my own... thats how I learned. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[05fronty 5,000+ posts]

yes Ryan does great work. big fan of his.
I myself prefer doing my own... thats how I learned. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

most people are better than me at this. i'm ssssstttuuuuppidd when it comes to boxes lol

 

[SicAudio 5,000+ posts]

well good thing for you that so many of us like ya then huh? lolz

 

[Flastrongman 10+ year member]

Or just take my free advice and thank me later. It will get you where you want to be.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[THATpurpleKUSH 5,000+ posts]

yes Ryan does great work. big fan of his.
I myself prefer doing my own... thats how I learned. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Though I do appreciate the designs he does, I kinda prefer to do it on my own so I can learn. Like the title says, its my first 4th order and I was just looking for some advice to nudge me in the right direction.

Someone mentioned that the t line can be tuned differently and not just to fs, I would love to learn more about t lines if anyone cares to share some knowledge.

Whats the best way to be able to remove the speaker in a 4th order? Should I just use some thin strips of wood to create a lip that a removeable panel can sit on?

 

[Flastrongman 10+ year member]

yup, I've done that on many occasions. Now I usually just make an entire panel removable. On my current box the entire top is removable which basically make the entire box easy to modify.

 

[05fronty 5,000+ posts]

well good thing for you that so many of us like ya then huh? lolz

fuuuuu lol

 

[wenn_du_weinst 10+ year member]

are you sure a 4th order is best for your car?

 

[THATpurpleKUSH 5,000+ posts]

are you sure a 4th order is best for your car?

4th order will be fine for my car, Im looking to get the highest numbers possible.

Thanks for everyones help, I really appreciate all the feedback //content.invisioncic.com/y282845/emoticons/suave.gif.858fc102f7646e678ee8af7e1fbc41d1.gif

 

[SicAudio 5,000+ posts]

Though I do appreciate the designs he does, I kinda prefer to do it on my own so I can learn. Like the title says, its my first 4th order and I was just looking for some advice to nudge me in the right direction.
Someone mentioned that the t line can be tuned differently and not just to fs, I would love to learn more about t lines if anyone cares to share some knowledge.

Whats the best way to be able to remove the speaker in a 4th order? Should I just use some thin strips of wood to create a lip that a removeable panel can sit on?

since a tline is based on the sd and the speed of sound quartered ( for a 1/4 wave ) you adjust the length to adjust the tuning. typically length is based on the fs but to tune higher that length is shorter and lower is longer etc..

 

[THATpurpleKUSH 5,000+ posts]

Ok, so you would keep the cross sectional area the same and just shorten the length.... makes sense. Now if I was to use a t line for spl, would I still wanna tune fairly high, like 40-50hz? And would it be the same as a regular ported box, where a higher tune yeilds a more limitied bandwidth aka not good on music?

 

[Moble Enclosurs 10+ year member]

I figured I can jump in on this. I noticed you are talking about Tlines as well. If you are looking for numbers, do not go with a tline. They can produce great numbers, by all means, but the response is geared mainly towards a broader response curve. Even a simple ported bass reflex design might do well for you, depending on certain parameters that need to be looked at. Im sure the 4th order will do great, even a 6th can be figured for a concentrated freqeuncy range about 3-5Hz band, which some prefer if they are unsure of their vehicles peak resonances.

But overall, if you want to do a 4th, then do it. As far as helping with the actual design, that is not something I can do in a post, lol. It will take a lot of work to get it right. You can get something great with general information, as we are talking about LF response in a small area, but fine figuring the design will do wonders for it. Just adding that in there for thought.

Oh, and Proper tlines do not inherit a tuning frequency, more so a low impedance dip depending on the phase of the enclosures mouth in relation to the driver position, but again I would not recommend a tline for that, so do not worry about that.

 

[Moble Enclosurs 10+ year member]

Ok, so you would keep the cross sectional area the same and just shorten the length.... makes sense. Now if I was to use a t line for spl, would I still wanna tune fairly high, like 40-50hz? And would it be the same as a regular ported box, where a higher tune yeilds a more limitied bandwidth aka not good on music?

No, not at all. The higher tuning will actually help with sound quality in most cases, when you consider the transfer function of the vehicles resonances in the response. Though, this can be used for narrow-band response, it is less efficient in that type of design for most setups.

 

[THATpurpleKUSH 5,000+ posts]

Thanks for all the help, I cant give out anymore "thanks" wtf is up with that, you can only thank x amount per thread?

 

[THATpurpleKUSH 5,000+ posts]

but fine figuring the design will do wonders for it. Just adding that in there for thought.

Would this be with a legit box modeling software or building and testing and rebuilding and more testing or what?