4th Order for Z v.3 12" - Car Audio Classifieds!
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Old 08-08-2012, 03:28 PM
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Default 4th Order for Z v.3 12"

I've attached a 4th order design for a Z v.3 12" that I picked up recently. Wondering what anyone's thoughts are on this. It's .75cf sealed and 2.25cf @ 50hz with 60in^2 of port. Does anyone have experience with this particular sub in a 4th order?

The image I attached is ridiculously small. Here's a link to the full-size version => https://www.dropbox.com/s/mu0uc7j673...zv3_12_4th.png
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File Type: jpg zv3_12_4th.jpg (16.7 KB, 44 views)

Last edited by brandon_s0854; 08-08-2012 at 03:31 PM.
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Old 08-08-2012, 03:31 PM
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that's a weird looking forth order
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Old 08-08-2012, 03:36 PM
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Quote:
Originally Posted by justchill0ut View Post
that's a weird looking forth order
How so?

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Old 08-08-2012, 03:38 PM
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I've seen several like that. Makes the best use of space for single sub 4th orders. My biggest concern at this point is if these subs work well in 4th orders. I'm pretty confident the design is not bad. Still would like some input from community!
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Old 08-08-2012, 03:38 PM
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Sealed section might be a tad small. What kind of passband and peak tuning are you looking for?
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Old 08-08-2012, 03:42 PM
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Quote:
Originally Posted by Ronmeister View Post
Sealed section might be a tad small. What kind of passband and peak tuning are you looking for?
I'd like to peak around 50hz. Would like to be fairly flat from 30-70hz.
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Old 08-08-2012, 03:43 PM
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they do work well in 4th orders, a buddy of mine has 4 z3 18's in a 4th wall, he made his have a huge sealed side and they do very well in it.
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Old 08-08-2012, 03:47 PM
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Quote:
Originally Posted by perfect_prefect View Post
they do work well in 4th orders, a buddy of mine has 4 z3 18's in a 4th wall, he made his have a huge sealed side and they do very well in it.
Does the fact that the 18" version works well mean the 12" will? I'm not sure. Based on that statement, maybe I should do something more like 1cf sealed, 2cf ported. Go with a 2:1 ratio with a slightly larger sealed section over a 3:1 ratio with a smaller sealed section.
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Old 08-08-2012, 03:50 PM
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Quote:
Originally Posted by badmofo529 View Post
How so?

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personally too many turns. I tried a box like that and it farted, but I had only 1inch opening on an sa-8. 4" looks better and might work okay, just risky is why I said weird.
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Old 08-08-2012, 03:53 PM
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Quote:
Originally Posted by justchill0ut View Post
personally too many turns. I tried a box like that and it farted, but I had only 1inch opening on an sa-8. 4" looks better and might work okay, just risky is why I said weird.
There's only one 180* turn. This seems to be a highly debated subject. I've heard some people say they've built a box with three 180* turns and it sounded great, and I've heard others say that one 180* turn is too much.
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