Team Ascendant 18s Box design.

[Jeffdachef 5,000+ posts]

So the wall is definitely gonna happen this year.

Plotted out some of the graphs on winisd

ported(white line) looks peaky as fk unless you do 3 cubes tuned to 31hz which aint happening...

subwoofer seems like pure garbage in a 4th order aka the blue Mt. Everest line. Yeah no other number figures or tuning remotely changes how this peak looks.

6th order seems best. green is very flat but not much bandwidth or spl, yellow offers better bandwidth and spl capabilities in the other chart. However there's a dip in the 40hz range, not sure how i feel about that since i like that note.

I got all the space in the world, anyone with experience with these woofers?

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[dbjunior 10+ year member]

Front chamber is way to small for a sixth. Dont trust the bandpass graphs that much. Ive built a few 6ths and they never respond like the graph. Yes b pillar walls started with 4 18's rebuilt as 15's because 43c was not nearly enough for 18's honestly just go flat wall with as much port as you can and test and slowly shrink port until you get where you want.

 

[Jeffdachef 5,000+ posts]

Front chamber is way to small for a sixth. Dont trust the bandpass graphs that much. Ive built a few 6ths and they never respond like the graph. Yes b pillar walls started with 4 18's rebuilt as 15's because 43c was not nearly enough for 18's honestly just go flat wall with as much port as you can and test and slowly shrink port until you get where you want.

its a minivan. I got MORE than enough space 100 cubes+ spare change

 

[Hertz Mafia]

Yea front chamber is way small. If ur doing a 6th order I would do like a 2:1 still which would be 6.5^3 : 13^3.... and graphs like that never work out like that in a vehicle.... if it was My van id do a huge ported wall.

My favorite 6th order was tuned at 25hz rear chamber and 50hz front chamber and was a 2:1

 

[Jeffdachef 5,000+ posts]

Front chamber is way to small for a sixth. Dont trust the bandpass graphs that much. Ive built a few 6ths and they never respond like the graph. Yes b pillar walls started with 4 18's rebuilt as 15's because 43c was not nearly enough for 18's honestly just go flat wall with as much port as you can and test and slowly shrink port until you get where you want.

Ported's always my fall back but I'm really feeling a 6th this time. If i'm going B pillar with 100+ cubes might as well keep it C pillar flat wall and have 2nd row seats.. I was planning on using the whole minivan for a super efficent enclosure.

Yea front chamber is way small. If ur doing a 6th order I would do like a 2:1 still which would be 6.5^3 : 13^3.... and graphs like that never work out like that in a vehicle.... if it was My van id do a huge ported wall.
My favorite 6th order was tuned at 25hz rear chamber and 50hz front chamber and was a 2:1

this is what your suggestion looks like lol

 

[dbjunior 10+ year member]

Try like 6.5 rear tuned to 32. Front 14 tuned to 55 ignore tge graphs just look at port velocity you want a normal amount of rear port and the front will need a ton. Also is this a series 6th or parallel. Series has more potential but might be harder to build.

 

[Hertz Mafia]

this is what your suggestion looks like lol

How can u plot it without port size? All U have is 25hz and 50hz.... I'm telling ya scratch the graphs and go build a shell as big as u can and figure out exactly how much space u will have and go from there. We are building a bpillar 4 sundown team 18 build right now and space gets eaten up FAST.

 

[Jeffdachef 5,000+ posts]

Try like 6.5 rear tuned to 32. Front 14 tuned to 55 ignore tge graphs just look at port velocity you want a normal amount of rear port and the front will need a ton. Also is this a series 6th or parallel. Series has more potential but might be harder to build.

definitely series.

How can u plot it without port size? All U have is 25hz and 50hz.... I'm telling ya scratch the graphs and go build a shell as big as u can and figure out exactly how much space u will have and go from there. We are building a bpillar 4 sundown team 18 build right now and space gets eaten up FAST.

Thats how winisd works, with the box tuning to size. Ports will be a different chart.

well after several layers of wood on top rear sides and bot I still have 60+ cubes to play with.

 

[dbjunior 10+ year member]

Not counting port displacement and inner wall displacement you would need 75c for a decent 6th for 4 18's. Just do a flat wall 5in thick front and back wall 30c build the port as large as possible and slowly shrink.

 

[Jeffdachef 5,000+ posts]

Not counting port displacement and inner wall displacement you would need 75c for a decent 6th for 4 18's. Just do a flat wall 5in thick front and back wall 30c build the port as large as possible and slowly shrink.

yeah... probably what it will boil down to. boring as fk. but life's a lot easier.

 

[kr15 5,000+ posts]

Dont put too much stock in the graph. Ray Maestas is doing 161 on 4 team 18s in a 4th. Its downright nasty.

Its a crazy ratio tho, like 5:1. I believe he has 2 flatline 8k

 

[Jeffdachef 5,000+ posts]

Dont put too much stock in the graph. Ray Maestas is doing 161 on 4 team 18s in a 4th. Its downright nasty. Its a crazy ratio tho, like 5:1. I believe he has 2 flatline 8k

team AAs?

 

[kr15 5,000+ posts]

Yes team AAs

 

[Hertz Mafia]

https://www.youtube.com/shared?ci=omNDpcCIpeQ

 

[Hertz Mafia]

https://www.youtube.com/shared?ci=Rsxt5cJU5zY

Here's another team AA 18 build

 

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https://www.youtube.com/shared?ci=8PYVIMtBkiU

 

---------- Post added at 09:50 PM ---------- Previous post was at 09:49 PM ----------

 

https://www.youtube.com/shared?ci=mbdTeQUmI2U