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View Full Version : Cobalt 2 12" Brutus 4th Order BP



2000LaDe
12-04-2009, 04:25 PM
ok since i cant cut outside at my place to work on nicks car ive been goin over to my team leaders house from work and working on his install of all the stuff he has bought off me over the past few months.

i won a pair of square brutus 12s and a brutus 1200w amp at the maxxonics show and i sold him the package and told him i would do his install for him.

Equipment

HU- Pioneer 7800mp
Subs - Hifonics Brutus 12s
Sub Amp - Hifionics Brutus 1200w amp
Mids/Highs - Memphis M class 6.5" coaxials (2 pair)
Mids/Highs Amp - JL Audio 300/4
RCA's/Power Wire - Knukonceptz
Extra Battery - Kinetik HC2400

been working on it for 4 nights now about 3 hours a night from like 3am till 6am. this box could NOT have been any bigger than it is and still be able to fit it in the car. had to take off the back door haha. We had Home Depot do all the cuts for us so we didnt have to bother doing it ourselves haha.

ok pics. keep in mind i havent taken pictures of everything but its just some that i have.

http://i10.photobucket.com/albums/a133/hankveach/PIC-0399.jpg
http://i10.photobucket.com/albums/a133/hankveach/PIC-0400.jpg

AHHHH HEAT!!!!!

http://i10.photobucket.com/albums/a133/hankveach/PIC-0402.jpg

start of the box

http://i10.photobucket.com/albums/a133/hankveach/PIC-0403.jpg
http://i10.photobucket.com/albums/a133/hankveach/PIC-0404.jpg
http://i10.photobucket.com/albums/a133/hankveach/PIC-0406.jpg

OOOO and the money shot

http://i10.photobucket.com/albums/a133/hankveach/PIC-0405.jpg

OH btw the shell of this enclosure is 8.8 cube total. it probably doesnt look like it in the pics but its a pretty big box for a small 4 door cobalt. we litterally had to cut a very small part out of the back deck. take the door off and jam it through cuz it was barely small enough to fit from every different angle. box goes from the VERY back of the trunk all the way to the front. it was a chore but some how i measured it perfect to be able to fit :)

here is what the box will end up looking like

http://i10.photobucket.com/albums/a133/hankveach/2124thorder.jpg

av8ter
12-04-2009, 04:33 PM
Ok I see what you did there!

That is funny you had to pull the back door.

I actually just put a 6cuft box in the back of an Audi A6 this past weekend. Didnt fit in through the trunk and I was shocked when we got it in through the back door.


Keep it up man!

Kevin

DS Autosports
12-04-2009, 04:33 PM
Getting that box in there has to ****; I had a hard time fitting a 3cu ft box in one...what a ***** it was . More pics; I want to see the finished product...

tez4life
12-04-2009, 04:58 PM
Wow, that was a tight fit, whats the specs on the box if I may ask?

mobeious
12-04-2009, 05:06 PM
specs on the box?

80INCHES
12-04-2009, 07:17 PM
yea cuz it looks good and how big is the port?

80

LDW3RD
12-04-2009, 08:04 PM
Looks good.
in for the results.

SicAudio
12-04-2009, 08:38 PM
nice to see them squares in a sweet build dude. they are gonna hammer hard in that. we did 6cf in a slotbox and it was very impressive.

gl keep us posted.

DB-Audio
12-04-2009, 11:38 PM
glad to see im not the only one using plywood lol looks good so far though

captaincheesey
12-04-2009, 11:51 PM
Lookin good hank. I will have you let you hear my next setup when I come up to visit next time.

2000LaDe
12-05-2009, 12:48 AM
box specs right now.

8.8 cube total. each sealed chamber is between 1-1.25 cube after sub displacement. port area will be determined after i start adding 2x4's shrinking down the front side till i reach desired tuning like i did with my truck. and ya its cheaper than mdf but only 7 ply but it seems to work just fine. and light as well too so no sag in the bag of the car. yes its not the best material to make it out of but its not an spl monster so it will be ok. will be using undercoating to cover the inside of the box.

J31Rob
12-05-2009, 12:53 AM
same wood my box is made out of looks like.. works great, super light weight. resonance is a little different than MDF but after a couple days you don't even notice. sounds better IMHO.

2000LaDe
12-06-2009, 10:49 PM
got quite a bit done today so i took some pics. im still messing with the port to get best output but right now it sounds great. im gonna bring my meter to his house tomorrow night and get to trying some different things out. right now i LOVE the way it sounds for having cheaper subs and only a 1200w amp. no idea number wise what its hitting but my goal is to hopefully hit between a 44-46 on music

FYI i HATE! using this JL Audio amp because they way the connections and stuff is faced.

http://i10.photobucket.com/albums/a133/hankveach/106_0016.jpg
http://i10.photobucket.com/albums/a133/hankveach/106_0017.jpg
http://i10.photobucket.com/albums/a133/hankveach/106_0018.jpg
http://i10.photobucket.com/albums/a133/hankveach/106_0019.jpg
http://i10.photobucket.com/albums/a133/hankveach/106_0020.jpg
http://i10.photobucket.com/albums/a133/hankveach/106_0022.jpg

galacticmonkey
12-07-2009, 12:33 AM
Looks good, in for updates.

path2spl
12-07-2009, 12:33 AM
why the 2x4s?

2000LaDe
12-07-2009, 12:39 AM
why the 2x4s?

stronger loading wall for the subs.

hazardous0388
12-07-2009, 12:39 AM
nice

S.B.C.
12-07-2009, 12:39 AM
cost effective i believe

No, strength u fool


Pretty as always Hank

GAM3OVR
12-07-2009, 01:13 AM
****

KyngHype
12-07-2009, 12:59 PM
nice

2000LaDe
12-08-2009, 07:48 AM
so i did some port mods and stuff and it sounds GREAT but not very impressed by the number its putting up. it managed to only pull a 140.4 at 40hz. i put the meter in the box and it did a 156 at 40hz and a 158.1 at 69hz.

didnt take any pics but we foamed around the box and some minor spots in the back deck.

o well its a good thing this is just a daily driver so at least it sounds good. it does a 139+ from 38hz to 48hz so it sounds good on about everything.

tez4life
12-08-2009, 08:00 AM
Main thing is that it sounds good, personally wasnt expecting great numbers from the setup, but love the install. Always nice to see something different, esp in trunk cars.

80INCHES
12-08-2009, 01:52 PM
so i did some port mods and stuff and it sounds GREAT but not very impressed by the number its putting up. it managed to only pull a 140.4 at 40hz. i put the meter in the box and it did a 156 at 40hz and a 158.1 at 69hz.

didnt take any pics but we foamed around the box and some minor spots in the back deck.

o well its a good thing this is just a daily driver so at least it sounds good. it does a 139+ from 38hz to 48hz so it sounds good on about everything.
make the port shorter and u should gain alittle on the spl..
other than that looks really good
80

Mr. Slate
12-08-2009, 02:10 PM
make the port shorter and u should gain alittle on the spl..
other than that looks really good
80

Not necessarily. The only thing that would probably do is raise his frequency.
The only way his numbers would go up is if he gets closer to the resonant frequency of his vehicle.
If your box tuning matches your resonant frequency of your vehicle, then you should be at the maximum spl for the vehicle.

djarmy2004
12-08-2009, 03:34 PM
Nice build man looks clean

2000LaDe
12-08-2009, 03:43 PM
make the port shorter and u should gain alittle on the spl..
other than that looks really good
80

i changed the port a couple times since the last pic. best output has came with 8" long and shrunk the port area too.

canadian-nowall
12-10-2009, 03:13 AM
perhaps if the sealed chambers are shrunk and stuffed, you will gain from lowering the peak freq and the added volume to the ported section will allow you to open the port up more?

2000LaDe
12-10-2009, 07:22 AM
welp almost done just need to fill some screw holes in and coat the inside of the port with bedliner and it will be complete. i will take some vids of it when we get it complete. threw something in the port today and wow i was impressed by how much air it does move.

http://i10.photobucket.com/albums/a133/hankveach/PIC-0409.jpg

JBGabriel
12-10-2009, 07:45 AM
That looks really nice. I wish I would have tried a 4th order in my trunk car. The way you sealed off the box looks great. Only way to do a trunk car IMO

80INCHES
12-10-2009, 02:22 PM
i changed the port a couple times since the last pic. best output has came with 8" long and shrunk the port area too.

O OK kool...lookin at the pic i thought ur port was long ...but kool..

80

KHARPS
12-10-2009, 02:26 PM
Looks really good. So how much port area does it have now?

Qxxx4
01-20-2010, 08:10 AM
How were you interchanging the ports so easily??