IXL 18 meets the "Easy Button"

[NEO Dan]

This is for the folks ready to pull the trigger on the IXL 18.4, or really anyone looking for a solid 400 liter box on the cheap, I plan on posting a revision allowing for a shorter port, for those that might object to the ~37 3/4" oal on the port, the center brace needs to be a little different, a minor adjustment.

If you can set the fence on the saw for 24", 23 1/4", 11 3/8", & 10 3/8", and use a circle jig, your good to go

I've got to give Vito props for the motivation to do this one, I like to go BIG, but this was what made sense to me for his setup.

Stats:

24 3/4" H&D by 49" L

~403 Liters as drawn
6" SCH 40 port of variable length up to 37 1/2" as drawn
Tuning ~11.5Hz as drawn


Looks harder than it actually is
You only need 2 sheets of 3/4" MDF to build this box.

First sheet gets cut into 24" wide strips

Second sheet is cut into 23 1/4" strips

The 23 1/4" strips are then run thru the saw again to make 23 1/4" squares

Take 5 of the 23 1/4" squares and cut 20" holes on center

Take 2 of the peices with 20" holes and rip them down to 11 3/8"

Take one of the halves and rip it again at 10 3/8"

I will post later on the port instalation and driver cutout



Later
Dan

[NEO Dan]

If anyone sees a way to do this cleaner, speak up

This box is for YOU FOLKS, Ideas are welcome



Later
Dan

[vitod]

Lovely, absolutely lovely. I like how you explain each cut. Bravo!


Please Dan, do make adjustments.

I seconed the comments, suggestions from everyone.

[crackyflipside]

How about adding a FR simulation given the box size, tune, etc....

[mrogowski]

Nicely done Dan. Round those ends if you can. Do you have a permanent location to hold this info?

[crackyflipside]

Originally Posted by mrogowski

Nicely done Dan. Do you have a permanent location to hold this info?

Offtopic:

Hey, is the IXL a drop-in for the Mach5's or am I going to need to drill new mounting holes?

[mrogowski]

Ha! I knew you were going to ask that.

They are *very* close if not bang-on. If you didn't flush mount your drivers I can't see a problem with doing a drop-in. I'll verify it tomorrow with one of my test boxen...

[BNW]

I don't have hard data to support this, but i have to believe rounding over all the holes / semi circles of the internal bracing has to substantially increase the airflow within the cabinet. The sharp edged holes will create significant turbulance at the airflow rates and volumes these "air engines" are generating.

[BNW]

Dan,
a bit more detail about making the port mounts as pictured please...

[NEO Dan]

Originally Posted by mrogowski

Nicely done Dan. Round those ends if you can. Do you have a permanent location to hold this info?

Mark,

I'm all about the roundover, but.....
I've olny got a few months of self-taught CAD under my belt, but I'm thinking Google Sketchup won't do roundover on a radius. If you, or anyone else for that matter could help me understand how to do that i'd really appreciate it. I do intend to convert the refined end result into a .pdf file format. I'd be happy to send it your way.

Since you the man to ask, may I have the measurement for the proper depth of cut to flushmount the driver, I'm drawing it with a 16.75" mounting hole and a 18.25" ID recess, but i'm missing the depth figure. I also need an accurate as possible figure for driver displacement, I eyeballed it at 4.25 liters.


Thanks
Dan

[Collo]

I absolutely love Google sketchup. It took me ages to work out how to draw rollovers and flares because the built-in help is not detailed enough.

Anyway, you can do rollovers....



I've done a tutorial for you and was going to post it here, but all the images would clog up this thread too much.

See this Drawing flares and rollovers in google sketchup

Happy extruding!

[NEO Dan]

Collo,
Thanks, this is gonna be fun.
I never even knew that tool existed.
Mabey someone will arange for a group buy on 1.25" and 1.5" round-over bits, LOL.



Later
Dan

[NEO Dan]

Collo,
my puter just went to lunch, I drew a Torus @ 180 degrees of resolution on both axis, that's 32,763 entries. I thought it was never gonna get done LOL

Do you go by Bill or do you prefer Collo?


thanks again
Dan

[NEO Dan]

32" OAL port and revised brace

[Scott Simonian]

How about adding a FR simulation given the box size, tune, etc....

Blue = 11.5hz
Pink = 13hz
Black = 15hz

@ 350w

[Collo]

No worries Dan, I enjoyed writing it up. I use "Collo" in various forums, so I stick with that as my public persona, although I tend to reply to emails and pm's as Bill.

Those big roundover bits work well for flaring ports and smoothing braces. You need to do the cuts in severaral shallow passes though - get too hungry and the bit will dig in.. just too scary with a powerful router!

I imagine your design will become quite popular, as people just starting out like to have plans to work from.

You might re-work one of the braces to act as a support for the port. Apart from that, well done!

[mrogowski]

Just to clarify things - I was referring to rounding over the port ends, and not the braces. Sorry, I should have been more specific.

Dan, please give me a day or two to get that info you ask. I wanted to get the mounting for Crack but simply ran out of time today...

m

[noah katz]

Very clever and efficient use of material.

Maybe I'm just not seeing it, but I think their ought to be a support for the free end of the vent.

[vitod]

Yes Dan, please rework the braces showing port support. And when your done, give cut details on any revised parts.

Great job Dan!

[mrogowski]

Originally Posted by NEO Dan

Mark,

I'm all about the roundover, but.....
I've olny got a few months of self-taught CAD under my belt, but I'm thinking Google Sketchup won't do roundover on a radius. If you, or anyone else for that matter could help me understand how to do that i'd really appreciate it. I do intend to convert the refined end result into a .pdf file format. I'd be happy to send it your way.

Since you the man to ask, may I have the measurement for the proper depth of cut to flushmount the driver, I'm drawing it with a 16.75" mounting hole and a 18.25" ID recess, but i'm missing the depth figure. I also need an accurate as possible figure for driver displacement, I eyeballed it at 4.25 liters.


Thanks
Dan

Ok, the height of the basket lip is 9mm and the total height (which includes the basket lip and the neoprene trim gasket) is 15mm.

The displacement of the driver is 0.43 cubes or 12 litres.

Best,
Mark

[armystud0911]

I am seeing some higher port velocities at and leading up to the tuning frequency, this is nice for a small enclosure, but I really like 600L with an 8" port, get rid of that noise.

[NEO Dan]

The displacement of the driver is 0.43 cubes or 12 litres.

Mark,
I know i've got dyslexic tendencys, 4.3 liters? 12 liters is huge, like the SD for the driver x 116mm depth, I think your over double the displacement at 12 liters.

I am seeing some higher port velocities at and leading up to the tuning frequency, this is nice for a small enclosure, but I really like 600L with an 8" port, get rid of that noise.

Army,
sure 600L and a 8" port looks better for the most part. That's not what this is all about.

For me this box and Scotts RL-p build are about what can be done within the limits of 2 and 3 sheets of MDF, that don't require advanced assembly technique or knowledge.

So when someone wanders in and says, "Hey what box can "I" build that will make that new IXL whip azz in my HT setup?" there will be at least a solid "stock design" to use outright, or as a reference to improve upon.

For someone who is new to DIY it's easier to recruit help when you've got a solid plan. It seems virtually everyone knows someone with most of the tools and enough skill to execute the build properly, and more often than not that builder with the tools has never built a subwoofer due to lack of design knowledge or plans.
My goal is to make the build so easy to execute properly that, when a builder is approached with the plans, it's almost imposable to turn it down. We all know the results are addictive, and once that box is heard it's all down hill from there...


I'll finish the port support details tonight



Later
Dan

[corejonp1]

Hey guys, newer dude here. Just want to offer my help, to you, and any project. I have 4 years of cad under my belt. You send me rough sketches with important (critical) dimensions, and I'll pour you a tall glass of finshed production sketches. On the house, My current job normally leaves me with soo much free time ( I often feel guilty - then I regain sanity). So, offers on the table. You email me rough sketches, and I'll give you production drawings, 3d models, renderings, what ever you need. Just remember I will need critical dimensions, not just box dimensions, give me what I need. Driver specs, dimensions, how you want it to be mounted, get me a napkin with good solid dimensions, and I'll put something together.

[Adamms]

I think some of the dimensions are off. If you cut the one sheet into four 24" x 49" pieces to use as the large sides, the box will end up being 24" x 25.5" x 51.5". Also, the height of your half circle braces would have to be 24". The other dimension of the interior of the box would then be 22.5"

[mrogowski]

Originally Posted by NEO Dan

Mark,
I know i've got dyslexic tendencys, 4.3 liters? 12 liters is huge, like the SD for the driver x 116mm depth, I think your over double the displacement at 12 liters.

Later
Dan

Yes, you're right Dan, thanks for the catch. Its actually 0.21 cubes or 5.9 litres.

My fault for doing up calcs before coffee...


Best,
Mark

[Looneybomber]

Originally Posted by corejonp1

Hey guys, newer dude here. Just want to offer my help, to you, and any project. I have 4 years of cad under my belt. You send me rough sketches with important (critical) dimensions, and I'll pour you a tall glass of finshed production sketches. On the house, My current job normally leaves me with soo much free time ( I often feel guilty - then I regain sanity). So, offers on the table. You email me rough sketches, and I'll give you production drawings, 3d models, renderings, what ever you need. Just remember I will need critical dimensions, not just box dimensions, give me what I need. Driver specs, dimensions, how you want it to be mounted, get me a napkin with good solid dimensions, and I'll put something together.

Does this offer extend beyond just the IXL driver and enclosure in this thread? I'm good at drawing stuff, not to scale, on a paper but I'm pretty much the suck at both CAD and photoshop.

[NEO Dan]

corejonp1,
Thanks for the offer, I might take you up on it. I need to draw as much as possible so i can get better at it

Adamms,
thanks for taking the time to actually check it out. It is not put together the way you were thinking that's how the panels got to be that way.


Mark,
I've been feeling the same way lately, 24-7

Everyone,
Here's how you cut the port support and brace
I'll revise the instructions above and edit the post

[mrogowski]

Those are great pictures Dan. If you want/need a permanent location for them I'll ask my buddy if he can host them for you...

[NEO Dan]

Mark,
thanks


*****

I am such a burnout, now that I look at the port brace, i'm thinking about changing it


Later
Dan

[NEO Dan]

I like this much better