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post #181 of 609 Old 06-01-2015, 08:17 AM
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Originally Posted by Augerhandle View Post
Ya'll do realize that Auburn is in Alabama, not Georgia, and it is about 100 miles southwest of Hotlanta, right? Just checking...
Yeah, but once you start driving south it's easy to keep going! Nearly went to the Auburn-Kstate football game a few years ago so had it mapped out. Most would fly, but road trips are more fun in my view.

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post #182 of 609 Old 06-01-2015, 08:25 AM
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Originally Posted by Pain Infliction View Post
What I would do is cut some small strips that are thick enough not to bend and put them around in the middle. Something like this.

In a build this epic I would scrap MDF (for the bracing) and go with wood dowel rods. Stronger and actually take up less internal volume. Can weave them around the speaker basket to brace any panel space larger than 8" x 8" as shown in @Pain Infliction 's graphic.

While wood can gain/loose moisture it is not really an issue with dowel bracing a because the end grain is secured to a speaker panel, and that is where the majority of moisture gains access.

It's a cheap, effective, and lighter weight option. They also hole screws and/or inserts better than MDF.

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post #183 of 609 Old 06-01-2015, 08:57 AM
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Quote:
Originally Posted by Pain Infliction View Post
What I would do is cut some small strips that are thick enough not to bend and put them around in the middle. Something like this.

I will also throw in my suggestion for this type of bracing
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post #184 of 609 Old 06-01-2015, 09:17 AM
 
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Dowels work nice cause you can countersink them a little with a forstner bit.

But I usually just rip mdf scraps in like 4" width and use that. The scraps that are left when you cut the box down to size are usually already perfectly dimensioned in length and fit perfectly.

There is some decent strategy to oversize the box an inch to allow for decent and ample bracing and still maintain desired volume. Bracing is like insurance - better to have extra and not need it than not enough and end up needing it.
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post #185 of 609 Old 06-01-2015, 10:15 AM
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In a build this epic I would scrap MDF (for the bracing) and go with cheap az Broom Handle. Stronger and actually take up less internal volume. ...
+1
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post #186 of 609 Old 06-01-2015, 11:28 AM
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Probably overkill bracing, but it was my first foray into DIY.

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post #187 of 609 Old 06-01-2015, 02:33 PM
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Probably overkill bracing, but it was my first foray into DIY.

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Yeah, probably overkill. LOL
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post #188 of 609 Old 06-01-2015, 03:37 PM
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This forum is should be renamed to overkill. In excess is the norm. I was told I went a little nuts with the hole saw on my bracing...


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post #189 of 609 Old 06-01-2015, 03:58 PM
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Speaking of which did you ever get it loaded and tested? I wondered if it all held up ok.
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post #190 of 609 Old 06-01-2015, 03:58 PM
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Quote:
Originally Posted by Pain Infliction View Post
Also, just in case you ever change amps or change anything, I would also wire each coil to its own terminal on the back. It is easier to change from parallel to series on the back instead of taking out the drivers. If you are going to use speakons, you really can't do it that way. I choose not to use speakons on the back of my subs for this reason. To each their own though.
Actually 4 pole speakon are perfect for that. 1 coil on the +1 -1 and the other on +2 -2. Add a small jumper between -1 and +2 for series or 1 between each positives and negatives for parallel.

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post #191 of 609 Old 06-01-2015, 04:26 PM
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Quote:
Originally Posted by Red Devil 24 View Post
Actually 4 pole speakon are perfect for that. 1 coil on the +1 -1 and the other on +2 -2. Add a small jumper between -1 and +2 for series or 1 between each positives and negatives for parallel.

Good point. However, that jumper needs to be at least the same gauge wire as what is being used.

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post #192 of 609 Old 06-01-2015, 08:25 PM
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Thumbs up No better kill than overkill!

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post #193 of 609 Old 06-01-2015, 08:53 PM - Thread Starter
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post #194 of 609 Old 06-01-2015, 09:43 PM
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Originally Posted by auburnu008 View Post
Dowels it is. Would 1" be enough? Check the link below.

http://www.homedepot.com/p/Unbranded...4EDC/100032765
I don't like using dowels because attaching them can be more difficult, and they're more likely to come loose if just gluing them. I prefer just using strips of whatever sheets goods are left over and interconnected them.

Just my $0.02. It's easy to glue/nail a strip to the outside of the enclosure, then lay one on top of it and glue it to the enclosure and the strip you just put on, and nail it to the strip as well.

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post #195 of 609 Old 06-02-2015, 09:32 AM
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I've been creepin' on this build thread and thought I would throw in my version of bracing for the win! Glued and screwed two-by-fours as close as physically possible to the mounting holes for extreme lateral support. No dowels or scraps here. The small loss of volume is likely made up for by the lack of enclosure flex. Also, it's easy enough just to make the enclosure(s) slightly larger. I can park my truck on these!!!
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post #196 of 609 Old 06-02-2015, 09:46 AM
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Originally Posted by notnyt View Post
I don't like using dowels because attaching them can be more difficult, and they're more likely to come loose if just gluing them. I prefer just using strips of whatever sheets goods are left over and interconnected them.

Just my $0.02. It's easy to glue/nail a strip to the outside of the enclosure, then lay one on top of it and glue it to the enclosure and the strip you just put on, and nail it to the strip as well.

pics...





What does @notnyt know? Kidding, I recall he had a lose brace that was annoying to say the least. Strips made from plywood like in Not's killer build work well, I used oak in my mains because they are subjected to repeated military moves and wanted the added strength (probably only psychological).

I just don't believe MDF is the route you want to go, I mean it's just glorified paper. Works great for enclosures but not structural.

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post #197 of 609 Old 06-02-2015, 11:26 AM - Thread Starter
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I was going through some old threads of mine last night (looking back on some of them gave me plenty of laughs) and saw my Mach 5 audio build thread from 2007. Anyway, I am going to use 1x1's for bracing similar to the way I braced those. I will add more and brace it better though but I think 1x1's are the ticket. I am going to head to Home Depot this afternoon and see if they have any decent wood.

Check out my thread form 2007. Funny how I thought these 4 18's were the holy grail of bass back then.
https://www.avsforum.com/forum/155-di...diy-build.html
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post #198 of 609 Old 06-02-2015, 12:13 PM
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Originally Posted by HIFIJIM70 View Post
I've been creepin' on this build thread and thought I would throw in my version of bracing for the win! Glued and screwed two-by-fours as close as physically possible to the mounting holes for extreme lateral support. No dowels or scraps here. The small loss of volume is likely made up for by the lack of enclosure flex. Also, it's easy enough just to make the enclosure(s) slightly larger. I can park my truck on these!!!
You have large portions of entire panels unbraced, and the braces in the spots where it's not as required (right by the edges).
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post #199 of 609 Old 06-02-2015, 12:16 PM
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Originally Posted by NWCgrad View Post
What does @notnyt know? Kidding, I recall he had a lose brace that was annoying to say the least. Strips made from plywood like in Not's killer build work well, I used oak in my mains because they are subjected to repeated military moves and wanted the added strength (probably only psychological).

I just don't believe MDF is the route you want to go, I mean it's just glorified paper. Works great for enclosures but not structural.
I switched to that method after dealing with a loose brace

If its thick enough, MDF will be ok. Try to stretch a piece of MDF, see how well that works
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post #200 of 609 Old 06-02-2015, 12:40 PM
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There is no stretching MDF by bare hands, but when doing a build I broke three off when I knocked the box off the stand. Torsion (twisting) strength is lousy. However, once built probably not really a stress they would ever be under.

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post #201 of 609 Old 06-02-2015, 01:06 PM
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Originally Posted by notnyt View Post
You have large portions of entire panels unbraced, and the braces in the spots where it's not as required (right by the edges).
It may appear that way, but actually none of the braces are at the far edges. All are close to the driver and PR's mounting points and close enough to the middle of the panels. Also, those 2Xs were cut very tight and jammed in there under tension.
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post #202 of 609 Old 06-02-2015, 01:12 PM
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Originally Posted by HIFIJIM70 View Post
It may appear that way, but actually none of the braces are at the far edges. All are close to the driver and PR's mounting points and close enough to the middle of the panels. Also, those 2Xs were cut very tight and jammed in there under tension.

Any braces to the top or bottom panels?
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post #203 of 609 Old 06-02-2015, 01:13 PM
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There is no stretching MDF by bare hands, but when doing a build I broke three off when I knocked the box off the stand. Torsion (twisting) strength is lousy. However, once built probably not really a stress they would ever be under.
Yeah, it won't hold up to being twisted, but there shouldn't be any of those forces on it once in the box. I wouldn't have went with slim pieces like I did with ply if I was using MDF.
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post #204 of 609 Old 06-02-2015, 01:49 PM
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Any braces to the top or bottom panels?
Yesir
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post #205 of 609 Old 06-02-2015, 02:00 PM
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Did someone say bracing??





BTW, you better be glad popalock is overseas or he would already be planning the 32 HS24 rebuttal to this project...
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post #206 of 609 Old 06-02-2015, 03:30 PM
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I used 1x2" furring strips. Cheap and easy to glue/brad in.




eta I did use a MDF 3" window brace in the center also.
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post #207 of 609 Old 06-02-2015, 08:36 PM
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I like to use 1" dowel with 1 brad nail and PL on each end, theres no way they are coming out.
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Blasting brown notes for 10 years and counting!

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post #208 of 609 Old 06-02-2015, 08:44 PM
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Did someone say bracing??

BTW, you better be glad popalock is overseas or he would already be planning the 32 HS24 rebuttal to this project...
Ha! No one will top this build.
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post #209 of 609 Old 06-05-2015, 05:34 PM
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OP has to promise to use the full output of this system on a regular basis, to do otherwise is blasphemous...

Not sure if he is prepared though. Like exploding the first nuke ever (you don't know if the Earth will survive it.)
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post #210 of 609 Old 06-05-2015, 05:48 PM
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Perhaps he should test them in a certain stadium located in Tuscaloosa Alabama. Maybe they will cause cataclysmic structural failure.

As an aside, watched the ESPN 30 for 30 episode on Bo Jackson last night. He was right around my time in college, but you forget just how freakin dominating that man really was in his prime (not that we saw anything else due to the tragic way his career ended).
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