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View Full Version : dual 12s, trans am ported box build *PICS*



Lil Poot
03-26-2006, 07:00 PM
decided to get the ball rolling on this ported box, so i ordered the ports, bought the mdf, finished the plans and got cracking. started building today, thought i'd share a few pics. im planning on having 2 4 inch flared ports firing at the driver and passengers heads, with the 12's at the rear, angled upwards.

just test fitting here, actually wont block my rear glass at all with the hatch shut.

http://img472.imageshack.us/img472/6945/dcfc0056large1uw.jpg

basically all i got done today after i finished the plans. i did 2 of the smaller side pieces, but only attached one.

http://img475.imageshack.us/img475/4889/dcfc0058large9ae.jpg

this gives you an idea of the size of the ports i have to accommodate. 4 inch port my ***, its almost 7" at the widest point of the flare.

http://img475.imageshack.us/img475/1025/dcfc0054large3tc.jpg

this is without the box in. going to see where it sits with it in, then drop the front to match. looks goofy all high like this, i know.

http://img472.imageshack.us/img472/599/dcfc0052large0iq.jpg

spitfirees20
03-26-2006, 07:03 PM
Great start, looks like it's going to turn out awesome. Lots of work involved there, but the aero ports are lookin sweet :thumbsup:

SAG3
03-26-2006, 07:06 PM
looks complicated

Lil Poot
03-26-2006, 07:12 PM
just a thought, does anyone think i may be able to work in a slot port at the top?

i noticed while reading the instructions that came with the aeroports it said to have at least the diameter of the port between the port and any inside walls, but a 14 inch tall box isnt really an option for me. now, the front section for the ports is 8 inches tall, just enough to fit the aeroports.

IamDeMan
03-26-2006, 07:16 PM
Great project. I think you may want at least 3X 4" ports though. I used 1 4" aero port for my brahma 12" and when it's cranked it makes port noise. Mines in a trunk though so it wasn't as critical, but with those ports getting aimed at you, you're gonna here it. Keep us updated mang.

negativezeroz
03-26-2006, 07:16 PM
just a thought, does anyone think i may be able to work in a slot port at the top?

i noticed while reading the instructions that came with the aeroports it said to have at least the diameter of the port between the port and any inside walls, but a 14 inch tall box isnt really an option for me. now, the front section for the ports is 8 inches tall, just enough to fit the aeroports.

Slot port will most likely take up more cf so it will change your enclosure volume and tuning compared to the aeroports.

PowerNaudio
03-26-2006, 07:22 PM
i agree with going with at least 3 to 4 4" ports. the only problem is you're going to have to go with longer ports to keep the same tuning.

i suggest you do any part of the enclosure that is not going to be seen like the floor to save you on the weight side.
that box looks like is going to be heavy.

Lil Poot
03-26-2006, 07:24 PM
does anyone have any tricks of the trade for making angled cuts like im going to have to do? when i did the one in my sealed box i just carefully measured the angle and angled the blade on my table saw, but theres got to be a better way to attach pieces at an angle.

yeah i can't really go any longer on the ports, right now they're at the length they came as, i think 18 inches, and they'll just barely fit in there like that. i want to get the thing built first before i cut them so i can have the exact volume in case i have to change anything along the way, but i think they'll need to be about 14-15 inches long each.

i guarantee its gonna be heavy, my sealed box even needs 2 people to remove, over 100 lbs with the woofers in.

what do you mean you suggest i "do" any part of the box that won't be seen?

saywhat?
03-26-2006, 07:28 PM
thats how its done man, table saw adjusted to angle.

PowerNaudio
03-26-2006, 07:32 PM
what do you mean you suggest i "do" any part of the box that won't be seen?

lol my bad i meant to put in there the word fiberglass. lol

PowerNaudio
03-26-2006, 07:35 PM
oh and for the angles place a piece of paper on the board and trace the angle, cut the drawing of the angle and place it on the table saw and angle the blade to match the drawing.

baseballer1100
03-26-2006, 09:17 PM
Looks good so far. Keep it up!

Lil Poot
03-27-2006, 02:17 PM
ok i just figured up the airspace, and it looks like im working with 4.97 cubic ft, gross. after .36 woofer displacement and .26 for the ports, i've got 4.35 net.

this is a bit on the large side for a pair of rl-p 12's right? i'm planning on adding a bit of mdf bracing in the middle of each section but i doubt it'll displace more than 1/10th of a cubic ft, if that.

leaving the ports the way they are, dual 4 inchers at 18 inches each will give me about a 28 hz tune right?

IamDeMan
03-28-2006, 11:45 AM
ok i just figured up the airspace, and it looks like im working with 4.97 cubic ft, gross. after .36 woofer displacement and .26 for the ports, i've got 4.35 net.

this is a bit on the large side for a pair of rl-p 12's right? i'm planning on adding a bit of mdf bracing in the middle of each section but i doubt it'll displace more than 1/10th of a cubic ft, if that.

leaving the ports the way they are, dual 4 inchers at 18 inches each will give me about a 28 hz tune right?
Yes. 28hzish is right. The only problem is that when plotted in WinISD, it shows that when these woofs are given full power you will get a port velocity of 17m/s and rising up steeply at 40hz and below. At 25hz the velocity is 85m/s! That is a lot of noise to direct right at your ear.

ngsm13
03-28-2006, 12:21 PM
****.

Should be able to fit one more 4" port in there... they don't displace that much... that is... if you have the depth...

nG

Lil Poot
03-28-2006, 12:26 PM
thing is, i dont have the depth. i've got like 19 inches tops from the front of the box, to where the rear of the ports will hit the subs.

how much longer would they need to be? about the only way i could get more length would be to angle the ports downward to follow the box. i'd probably have to fiberglass for something like that, to keep a smooth surface inside the ports.

anything else i could do to minimize the port noise? i did change my mind about aiming them at my head, was going to try and put them right in the middle, side by side.

i think i'm just going to build it as a sealed box until i figure out exactly what to do about the ports, and leave the front section just screwed down.

Vadude
03-28-2006, 01:51 PM
Id go for sealed, the again this isnt my box.


nice concept and good luck

Lil Poot
03-28-2006, 03:06 PM
i built a sealed box, 2.6 cubic ft net. it was loud, but i wanted louder, didnt really want to buy new subs.

plus i was kind of bored, hadn't really done any projects in a while.

heres a couple pics of the sealed box if anyones interested and hasn't seen it.

dont dis the filler putty, i did this whole box with a circular saw and jigsaw, and was my first solo box build. i practiced a bit on the table saw before starting this ported box, and i'm quite a bit more accurate with the cuts than i was when i did this box.

http://img481.imageshack.us/img481/3016/dcfc0022large4zt.jpg

http://img481.imageshack.us/img481/1654/dcfc0023large0vi.jpg

IamDeMan
03-28-2006, 03:15 PM
Elbows FTW!

http://www.usplastic.com/images/products/pipe/28301p.jpg

http://www.usplastic.com/images/products/pipe/28314p.jpg

Lil Poot
03-28-2006, 07:54 PM
links?

Lil Poot
03-28-2006, 09:46 PM
i did a lot of procrastinating today, started on a second 4'x8' mdf sheet, really only cut 3 or 4 pieces, drilled the holes for the angled piece (easier said than done) and countersunk most of the holes. had to run to sears, got a new tablesaw blade, old one was over 20 years old and kept binding up, a router, circle jig, and a few bits.

heres the pics of what i got done yesterday, took these before i started today, it was getting dark again when i finished up todays work, but i'll get some more tomorrow. my camera takes ****** pictures once the sun starts going down.

this is most of what i'm using, other than the router.

http://img86.imageshack.us/img86/4628/dcfc0072large7ln.jpg

heres the tablesaw, thing's older than i am, seriously. i'm 23, i believe its about 25.

http://img138.imageshack.us/img138/4720/dcfc0071large3jj.jpg

closeup of my first angled cut, didnt bind up too bad actually, this is with the old blade. theres no gap, just looks like it because the one piece is recessed about 1/16th inch.

http://img143.imageshack.us/img143/4163/dcfc0070large1ui.jpg

these 2 are the box as it looked this morning. yes thats putty filler, my stoner *** drilled the holes in the wrong piece.

http://img69.imageshack.us/img69/9163/dcfc0067large6yb.jpg

http://img212.imageshack.us/img212/6034/dcfc0068large6nk.jpg

Lil Poot
04-01-2006, 07:02 AM
just putting up the pics from the other day, been working so i havent gotten anymore done on it, other than the small 2 inch piece to finish it up as a sealed box.

still have to glue most of it, silicone it, finish countersinking, and cut the holes for the ports and woofers.

no beats, but i got new meats kumho 285/40/17's :nod:
pardon my dirty *** car. those pipes are actually chrome under all that :(
note the burned rubber chunks on the fender behind the tires :naughty:

http://img97.imageshack.us/img97/2355/dcfc0120large8ln.jpg


http://img431.imageshack.us/img431/8396/dcfc0124large0gf.jpg


http://img97.imageshack.us/img97/1116/dcfc0122large6va.jpg

no more binding with the new blade, should have gotten it before i started :idiot:

http://img97.imageshack.us/img97/5340/dcfc0118large7rb.jpg

unrelated, but what the hell. bout a year ago, before i had the ss wheels.

http://img405.imageshack.us/img405/3685/car46bs.jpg

http://img90.imageshack.us/img90/9594/car57jd.jpg