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fwb_1234
02-10-2007, 08:32 PM
This is the box we are have been building. This is the first time either of us have built a box.

It's designed for a Digital Designs 9917b to be powered by an IA 20.1 running at .5 ohm.

The box is around 9 cubes tuned at 40 hz with double baffling on top for sure and possibly dowels.

Tools used:
Power drill
1/8" bit
1" spade hole bit
Circular saw
Jigsaw
1 1/4" Wood Screws (not drywall)
Wood glue
Silicone Caulk
2 cans black spray paint
clamps (2 huge 24" and 2 corner clamps) and
2 chairs

Here are some pictures:

First, the sub.
http://img244.imageshack.us/img244/1603/1006204bj0.jpg (http://imageshack.us)

These things are huge
http://img267.imageshack.us/img267/8884/1006195be2.jpg (http://imageshack.us)

These are all the cut pieces and 1 big extra piece.
http://img187.imageshack.us/img187/3365/1006211jl1.jpg (http://imageshack.us)

We (Sean) screwed up the measurement.
http://img329.imageshack.us/img329/8778/1006206mf1.jpg (http://imageshack.us)

Finally, after about 4 more goes around with the jigsaw
http://img153.imageshack.us/img153/9149/1006209jj0.jpg (http://imageshack.us)

Our first joint...
http://img264.imageshack.us/img264/5817/1006212mj9.jpg (http://imageshack.us)

View from the top without the baffles
http://img77.imageshack.us/img77/9346/1006216vw6.jpg (http://imageshack.us)

View from the bottom, without the bottom. You can see where the port will be.
http://img263.imageshack.us/img263/2424/1006217ho0.jpg (http://imageshack.us)

That's it for now. We'll probably have some more later.

Comments are cool.

baseballer1100
02-10-2007, 08:44 PM
Not bad.

rpfuror
02-10-2007, 10:44 PM
The driver don't fit in the Hole!!


JK.

Looks like a good start.

baseballer1100
02-11-2007, 01:22 AM
What kind of bracing are you going to use.

fwb_1234
02-11-2007, 02:41 PM
We don't have many plans for bracing. We are thinking about some dowels going from the top, through the port piece to the bottom, though, because that sub is really heavy.

sxpimpin
02-11-2007, 02:46 PM
I hope your planning on at least putting a brace in the center of that port.
If not the whole bottom of that port is going to flex like a *****

stuckinok
02-11-2007, 02:49 PM
that sub needs more then one 20.1 nice box though

stuckinok
02-11-2007, 02:52 PM
edit because iam dumb

fwb_1234
02-11-2007, 02:52 PM
What do you guys recommend about bracing?

fwb_1234
02-11-2007, 10:44 PM
bump...
What do you guys recommend about bracing?

mazdakid
02-11-2007, 10:57 PM
i always use pieces of mdf as bracing, alot of people use threaded rod, and people also use wooden dowels

SeanDub
02-11-2007, 11:03 PM
that sub needs more then one 20.1 nice box though

Yeah, I would love to pick up the 40.1 that's for sale right now, but I dont have to money for it at the moment cuz I still have to get a ho alt and all the electrical. I hoping the 20.1 will put out around 2000-2500 at 0.5 ohm on a very solid electrical, but who knows...

stuckinok
02-11-2007, 11:06 PM
Yeah, I would love to pick up the 40.1 that's for sale right now, but I dont have to money for it at the moment cuz I still have to get a ho alt and all the electrical. I hoping the 20.1 will put out around 2000-2500 at 0.5 ohm on a very solid electrical, but who knows...

yea but that thing will laugh at 2500 watts man my DD9512f takes my ZX2500.1 like nothing

SeanDub
02-11-2007, 11:10 PM
As far as bracing goes, we are for sure double baffling the top of the box. Other than that, we are playing around with the idea of using four dowels around the sub to support the top. However, we dont really have any ideas about side flexing, and we hadn't even thought about supporting the port except for using a piece with two 45 degree angles to connect the port to the front, on the inside of the box on top of the port, if that made any sense. Ideas for side flex and port flex? On a sidenote, what brand ho alts do you guys recommend?

Wkbdkid
02-11-2007, 11:11 PM
2x4s or threaded rod for bracing.

fwb_1234
02-24-2007, 10:00 PM
Alright, so we have an update, as promised.

Here some pics.

We painted the port area.
http://img138.imageshack.us/img138/4559/1006246eu9.jpg (http://imageshack.us)

My cousin dropped by (He's painting in the last pic. Here's his system.
http://img144.imageshack.us/img144/3299/1006247li2.jpg (http://imageshack.us)

Here is a pic of the upside from of the upside down, drying box.
http://img133.imageshack.us/img133/1679/1006249ip3.jpg (http://imageshack.us)

Back. Look at our terminal cups. We set the wood on fire with the hole drill.
http://img152.imageshack.us/img152/6900/1006250sl5.jpg (http://imageshack.us)

Our double-baffle top. Thats a hand jigged hole both times.
http://img152.imageshack.us/img152/9093/1006252si3.jpg (http://imageshack.us)

That's about it for now. We might put the top on, we'll see.

aaa70389
02-26-2007, 10:17 PM
so how did u calculate ur port length and all that good stuff?

SeanDub
02-26-2007, 11:02 PM
Send a PM to "rpfuror" he can explain it better than me and if you give him your specs I'm sure he'll let you know

fwb_1234
02-27-2007, 03:05 AM
Hey I've got some more pics. The site was down for a while for me, so I couldn't post, but here they are:

Here is the dowel we put in for bracing. Also pay attention to the angle pieces.
http://img241.imageshack.us/img241/5959/1006256vs5.jpg (http://imageshack.us)

We put the box in Sean's car and placed the baffles on top. He can't use the rearvew anymore.
http://img145.imageshack.us/img145/8834/1006257jo6.jpg (http://imageshack.us)

Here's another one, but with the hatch closed.
http://img136.imageshack.us/img136/3402/1006259ox5.jpg (http://imageshack.us)

That's it. We hope to get it all done tomorrow.

fwb_1234
03-14-2007, 01:30 AM
I've got some finished pics of the box. We finished a couple of weekends ago, but I'm just now getting around to doing this. So .. here ya go.

This is the final box, sanded and ready for whatever he is going to do to it. The lighting really brings out the imperfections. The top baffles are rounded around the edges if you can't tell.
http://img249.imageshack.us/img249/7237/1006264ox8.jpg (http://imageshack.us)

Here's a pic of the inside. As you can see we wrote the date and out names and such. We might have screwed up by buying silicone caulk, as the paint didn't stick. Maybe some oil-based paint might have worked, but we didn't have any, so we just stuck alot on.
http://img487.imageshack.us/img487/4811/1006269xj3.jpg (http://imageshack.us)

Here's a close-up of our dilemma. What do you guys do?
http://img157.imageshack.us/img157/7548/1006270nc5.jpg (http://imageshack.us)

Here are a few pics to put it in perspective. That's a size 12 or 13 shoe.
http://img241.imageshack.us/img241/7403/1006273hz6.jpg (http://imageshack.us)
http://img368.imageshack.us/img368/3301/1006276ki2.jpg (http://imageshack.us)
http://img411.imageshack.us/img411/3047/1006280bp3.jpg (http://imageshack.us)

What do you think for a first box?

blackbonnie
03-14-2007, 01:33 AM
its alright, i dont like how the sub hole was cut-out but youll get there

uhoh45
03-14-2007, 01:35 AM
they screwd up at first ?

fwb_1234
03-14-2007, 01:38 AM
Yeah, we were using some very rudimentary technology - like string, nail, and a jigsaw. We also had no idea how big the cutout should have been. We measured the subwoofer a couple of ways and then took the smallest measurement.

j3bus2k3
03-14-2007, 01:41 AM
Yeah, we were using some very rudimentary technology - like string, nail, and a jigsaw. We also had no idea how big the cutout should have been. We measured the subwoofer a couple of ways and then took the smallest measurement.

Measure the circumfrence, divide by pi, then divide by 2, that will give you the radius ;)

fwb_1234
03-14-2007, 01:45 AM
Yeah, we did that, and after it was all done, it was the closest to being right, interestingly.

uhoh45
03-14-2007, 01:48 AM
i usually just messure the cone:laugh:

Pop da Hatch
03-14-2007, 02:01 AM
How the f*ck do you mess up on the Jig that bad? I have like a 1975 black and decker Jig Saw that takes about 5 minutes to cut a hole for a 12" and it usually comes out looking about as good as a router job once sanded......