The Dtsdig Curvy-Cab Tux-1099 build!! - Page 2 - AVS Forum
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Old 07-08-2014, 10:21 AM
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If you want to save some money, and have same quality then buy 1/8" MDF. Use six layers which you will get from one sheet that costs 12 bucks.
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Old 07-08-2014, 10:46 AM - Thread Starter
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Originally Posted by chalugadp View Post
If you want to save some money, and have same quality then buy 1/8" MDF. Use six layers which you will get from one sheet that costs 12 bucks.
I wish that I could find it locally and I totally wood (see what I did there
I'll have to make some calls and see who else might have something available locally.
The lumber shop near me carries 1/8" Italian bending ply- $39.55, 3/8" Bending Luan- $47.90 and the thinnest MDF they carry is 1/4" for $23.40 per sheet.

I wonder how bendy the 1/4" MDF is.
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Old 07-08-2014, 10:51 AM
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Darn you dtsdig! Why did you have to start this now??? I just ordered a pair of Classix II kits and planned to do some simple boxes but now I'm getting that curved enclosure envy again.

Seriously, glad to see you start your build and I really enjoy your detailed threads. I think compared to building curved enclosures putting on veneer will be a breeze.
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Old 07-08-2014, 11:11 AM
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Originally Posted by chalugadp View Post
If you want to save some money, and have same quality then buy 1/8" MDF. Use six layers which you will get from one sheet that costs 12 bucks.
Hey chalugadp, I'm planning on using 1/8 mdf and was wondering if you have any advice on doing multiple layers at a time.

At worst, 1 layer per side would take 12 days to finish gluing up a speaker. I'm thinking about building a jig to cradle the enclosure while gluing up all 6 layers on the opposite side at the same time and then flipping it over and doing the other side the next day.
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Old 07-08-2014, 11:46 AM - Thread Starter
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Originally Posted by Boxozaxu View Post
Hey chalugadp, I'm planning on using 1/8 mdf and was wondering if you have any advice on doing multiple layers at a time.

At worst, 1 layer per side would take 12 days to finish gluing up a speaker. I'm thinking about building a jig to cradle the enclosure while gluing up all 6 layers on the opposite side at the same time and then flipping it over and doing the other side the next day.
When I did my subs with the 1/4" tempered hardboard, I put a layer on each side of the box and used a set of wooden "bones" kind of like cauls to apply even pressure and used 8 ratchet straps to squeeze the whole thing together. For the first few layers, I also popped a couple of brads in here and there just to hold things into position while I set up the bones and the ratchet straps.
If it were me, I would probably do 3 layers of 1/8" MDF at a time and just tack them in place with brads before you go about wrapping it all up with straps or whatever.
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Old 07-08-2014, 11:48 AM
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Originally Posted by Boxozaxu View Post
Hey chalugadp, I'm planning on using 1/8 mdf and was wondering if you have any advice on doing multiple layers at a time.

At worst, 1 layer per side would take 12 days to finish gluing up a speaker. I'm thinking about building a jig to cradle the enclosure while gluing up all 6 layers on the opposite side at the same time and then flipping it over and doing the other side the next day.
Yes you do all 6 layers at once use a glue that gives you at least 30 minutes set up time or you will be rushing like crazy your on the right track with bending around a mold the best way is to create the mold from you inner bracing make sure you have lots if clamps available when I did mine I used about 20 clamps

Quarter inch MDF will work for maybe a 2 inch curve the bend that I did was 6 inches
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Old 07-08-2014, 11:56 AM
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So are you putting on the back piece before you do the curve this time? You don't use any brad nails?
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Old 07-08-2014, 11:57 AM - Thread Starter
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Originally Posted by chalugadp View Post
Quarter inch MDF will work for maybe a 2 inch curve the bend that I did was 6 inches
Wow, I wouldn't have guessed that doing all 6 at once would work out, but like you say if the glue gives you some working time then that makes sense to me. Titebond I? Titebond II would not leave enough time. I have never seen or touched 1/8" MDF so I have no idea how pliable it is.

As far as the bend goes, mine is 3 inches. Do you think the 1/4" MDF with do it over a 19" span?
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Old 07-08-2014, 12:03 PM - Thread Starter
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So are you putting on the back piece before you do the curve this time? You don't use any brad nails?
The back piece was in place the whole time. The front (baffle) is what was not attached. I'm just adding strips of 1x2 to go between the front top corners of all front to back panels (sides and two middle divider walls). That way, the curved panels have 4 boundaries to bond to in addition to the top edges of the middle braces.
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Old 07-08-2014, 12:27 PM
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I used 2 layers of 3/16" hardboard for my sides. First layer was glued and stapled to all braces/edges. Then sanded everything down and the glued the second layer on and used packing shrink wrap to hold it. Worked like a charm.
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Old 07-08-2014, 12:46 PM
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Quote:
Originally Posted by chalugadp View Post
Yes you do all 6 layers at once use a glue that gives you at least 30 minutes set up time or you will be rushing like crazy your on the right track with bending around a mold the best way is to create the mold from you inner bracing make sure you have lots if clamps available when I did mine I used about 20 clamps

Quarter inch MDF will work for maybe a 2 inch curve the bend that I did was 6 inches
Thanks chalugadp. I just wanted to make sure I wasn't attempting the impossible and that's a good point with the glue. I have some titebond II lying around and that stuff sets up way too fast. Are you talking about your curved sealed sub build? That looks less than 6 inches to me so maybe you're talking about another build?


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As far as the bend goes, mine is 3 inches. Do you think the 1/4" MDF with do it over a 19" span?
I'm holding a 2' x 3' sheet of 1/4" mdf and it's pretty tough to put a slight curve in it using just your hands. I then used the couch arm rest to assist in bending it and that was easier but I was getting the impression that anything more than a slight bend and it was going to break.

Last edited by Boxozaxu; 07-08-2014 at 02:20 PM.
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Old 07-08-2014, 12:55 PM
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I used 2 layers of 3/16" hardboard for my sides. First layer was glued and stapled to all braces/edges. Then sanded everything down and the glued the second layer on and used packing shrink wrap to hold it. Worked like a charm.
So your curved sides are only 3/8" thick. Interesting. Maybe a full 3/4" isn't necessary.

I don't think I commented in your thread but those are some of the best looking DIY speakers I've ever seen.
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Old 07-08-2014, 12:58 PM
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Wow, I wouldn't have guessed that doing all 6 at once would work out, but like you say if the glue gives you some working time then that makes sense to me. Titebond I? Titebond II would not leave enough time. I have never seen or touched 1/8" MDF so I have no idea how pliable it is.

As far as the bend goes, mine is 3 inches. Do you think the 1/4" MDF with do it over a 19" span?
Maybe. Good old yellow Elmer's glue will give you the setup time you need. 1/8" MDF you can bend like crazy.
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Old 07-08-2014, 01:00 PM
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Originally Posted by Boxozaxu View Post
Thanks chalugadp. I just wanted to make sure I wasn't attempting the impossible and that's a good point with the glue. I have some titebond II lying around and that stuff sets up way too fast. Are you talking about your curved sealed sub build? That looks less than 6 inches to me so maybe you're talking about another build?




I just picked up a 2' x 3' sheet of 1/4" mdf and it's pretty tough to put a slight curve in it using just your hands. I then used the couch arm rest to assist in bending it and that was easier but I was getting the impression that anything more than a slight bend and it was going to break.
Yes the build was the curved sub. Your right I was thinking total bend was 6" , so three inches a side.
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Old 07-08-2014, 01:18 PM
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Originally Posted by Boxozaxu View Post
So your curved sides are only 3/8" thick. Interesting. Maybe a full 3/4" isn't necessary.

I don't think I commented in your thread but those are some of the best looking DIY speakers I've ever seen.
Thanks!

But yep, not even a full half inch thick. With these being only 8's, there really isn't that much pressure. Had the sides been straight, I would agree on 3/4, but the curve really strengthens them up. Plus they heavy enough as is :P
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Old 07-08-2014, 02:17 PM - Thread Starter
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Originally Posted by chalugadp View Post
If you want to save some money, and have same quality then buy 1/8" MDF. Use six layers which you will get from one sheet that costs 12 bucks.

Chalugadp, I managed to find a local supplier that carries 1/8" MDF for $19.47/sheet. Is that reasonable?
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Old 07-08-2014, 02:34 PM
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that sounds quite expensive, but it's probably cheaper than driving somewhere
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Old 07-08-2014, 02:38 PM - Thread Starter
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that sounds quite expensive, but it's probably cheaper than driving somewhere
It does seem expensive considering a sheet of 3/4" is about $33. I'm not sure what else to do though. It would still be far cheaper than bending ply.
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Old 07-08-2014, 02:38 PM
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Chalugadp, I managed to find a local supplier that carries 1/8" MDF for $19.47/sheet. Is that reasonable?
Sure. Two sheets should do you for two speakers. Its so easy to work with.
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Old 07-08-2014, 02:56 PM - Thread Starter
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Sure. Two sheets should do you for two speakers. Its so easy to work with.
My wall thickness is going to be 5/8" and the dimensions for each piece is 36" x 19" so I'll only get 5 pieces out of a sheet. $100 worth of 1/8" MDF for all three speakers. Doh!
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Old 07-08-2014, 03:44 PM
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My wall thickness is going to be 5/8" and the dimensions for each piece is 36" x 19" so I'll only get 5 pieces out of a sheet. $100 worth of 1/8" MDF for all three speakers. Doh!
Ouch !
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Old 07-08-2014, 05:34 PM
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Can't wait to see how these come out. Wood cost might be well worth it
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Old 07-08-2014, 05:52 PM - Thread Starter
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I'll plan on picking up a sheet on Thursday so I can get the center channel finished up. Beyond that, it looks like it will be September before I can throw down for the rest.
Unfortunately, the budget is super tight over the summer.
I should be able to at least build the structures for the fronts though.
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Old 07-08-2014, 05:52 PM - Thread Starter
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Can't wait to see how these come out. Wood cost might be well worth it
It will totally be worth it.
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Old 07-08-2014, 05:55 PM
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I'll plan on picking up a sheet on Thursday so I can get the center channel finished up. Beyond that, it looks like it will be September before I can throw down for the rest.
Unfortunately, the budget is super tight over the summer.
I should be able to at least build the structures for the fronts though.
Wow major bummer

My Build Thread
Equipment Speakers:
3x 1099's for LCR duty
4x Fusion 8's for surround duty
8x subs: 4x FTW21's and 4x SI18's
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Old 07-08-2014, 07:24 PM
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Man I know about tight budget too. Hang in there [emoji16]
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Old 07-09-2014, 05:54 AM - Thread Starter
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It will be ok. I'll have the 1099 as a center, and volt 10's for fronts, and my two subs. Not too shabby, really.
I do miss having surrounds but the front stage is way more important to me.
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Old 07-09-2014, 07:27 AM
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did you ask homedepot or lowes if they could order you in some? Did you check the shelving section, I find they have lots of wood there not even listed on their website?
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Old 07-09-2014, 09:30 AM - Thread Starter
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did you ask homedepot or lowes if they could order you in some? Did you check the shelving section, I find they have lots of wood there not even listed on their website?
I'm calling around now. Thanks for the suggestion!
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Old 07-09-2014, 10:02 AM
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Hardboard like I used is back by the tile kind of. Not in the big shelves with all the other wood.
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