1999 Suburban: C-pillar 4 18 4th Order - Car Audio Classifieds!
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  #1  
Old 06-11-2014, 10:13 PM
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Default 2000 Suburban: C-pillar 4 18 4th Order

So, just before Spring Break Nationals a friend wanted me to build him something to take down. He has a suburban, he had some equipment he had gathered and he had a few weekends i didnt have anything else to do, so i helped him out! This was the beginning, right now, we are switching things up .. He was happy with the results, but, like always in this hobby .. more more more

Equipment rundown:

Pioneer Head Unit
4 Sundown X-18s D4
2 Skar 4500s Strapped @ 2 ohm
PPI 2x250 old school on rear mids
3 XS Power Batteries in rear - 2 XP3000s, 1 d3100
Mechman 370 externally regged
4th Order Scott Boland Design idea, tweaked by myself
8 6.5s and 2 Selenium Super Tweets
Execution Wire

Before we start im just gonna leave this here



We utilized a slide in shell and all thread bracing through the sealed chamber. I insisted we built inside but oh well, it worked.











Had enough space left behind 2nd row to make a battery box, had to improvise on some of the cuts because of the seat brackets, no big deal, still did what we needed to do.



So At this point i think mounted subs and did some testing at .5 strapped ( .25 per amp ) and they didnt wanna stay on very long but was DUMB loud! so this next picture is with some port changes, started at 625 square @ 52ish iirc and had also got it mostly sealed off if not totally sealed off.







some vinyl that we actually didnt use, maybe on the rebuild



we used this color though



the trim panels was a rush job so they arent perfect, but they functioned for the time i have in them and im remaking them soon.





ok so that catches you up to the point where we are now!

this thing sounded like 155s in the front seat with the port around 400 square. it peaked at 35 hz sealed up and EASILY smashed 25 hz and moved a good deal of air. so obviously me saying it sounded like 55s means it didnt do 55s, it BASS RACED ( sealed 30 second average ) 152 @ 35 .. never clamped for rise. but 4ths are usually a little high.

With such a large cabin, i think thats a respectable number from the c-pillar and for 30 second average. i wanted to shrink the port to around 280, but didnt have time which is unfortunate because with such a large cabin, the smalled port wouldve had more velocity and helped pressurize the cabin better.
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Last edited by ridintwo6s; 06-11-2014 at 11:31 PM.
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  #2  
Old 06-11-2014, 10:14 PM
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So, here is what im doing currently.

resin



cheap ass filler







doors are as follows .. changed plan from the pictures

1 15" Mid
1 10" mid
1 ST200 per panel









building a center console for 2 of these as well.



Powered by 1 of these





And the amps powering the doors and the other mids and highs going through out.



went we these cause of the price we got on them and x10 multiplier on the crossover network. These things are much nicer then the pictures show. They are very sleek and compact but still feel beefy and durable.



and one of my parter ... Full Husky







and that catches you up to where i am now. making molds in a bit and then will be strengthening them over the weekend. and should have my low temp plastic on monday.
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Last edited by ridintwo6s; 06-11-2014 at 10:24 PM.
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  #3  
Old 06-11-2014, 10:14 PM
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Sub Stage rebuild is going from the 4 X-18s to 16 SA-12s, still staying in the c-pillar orientation. only difference is gonna be the chamber sizes. sacrificing ratio, for cone area, might test 12 and see what happens and we are also gonna add 2 more 4500s after he gets a new daily.

he also has 26s for it! Helo He866s plasti-dipped black
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Last edited by ridintwo6s; 06-11-2014 at 10:38 PM.
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Old 06-11-2014, 10:18 PM
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Nice... I wanna do a 4th order for my next build
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Old 06-11-2014, 10:24 PM
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reserved 2
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Old 06-11-2014, 10:25 PM
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reserves 3
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  #7  
Old 06-11-2014, 10:26 PM
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Quote:
Originally Posted by massivespl View Post
Nice... I wanna do a 4th order for my next build
its actually under going a rebuild currently, so he has no woofers ATM ... good bit more cone area going in. one of the posts ill list the changes in a second
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  #8  
Old 06-11-2014, 10:35 PM
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Looks like everyone has been busy with rebuilds lately!
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Old 06-11-2014, 10:49 PM
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just started another thread for a 2011 Kia Optima
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  #10  
Old 06-11-2014, 10:59 PM
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awesome work - did he get to get back on a meter and see if his score increased at all ?

i swear if can hit a 150 with my build i will be pleased as punch
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