DR LIne Array Stands done

Helpful hints on how to build 'em, and where to get the stuff you need.
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Tim A
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#16 Post by Tim A »

LelandCrooks wrote:For the next go round you might consider these. More money than the washer setup, but would be very pretty. Captive nuts, 1/4 is the biggest I've found though.

Image

BTW, your screws are on the way.
I thought about T-nuts or the like, but with this setup I can reverse the bolts and put the wing nut and strap on the inside for hauling and storage. The rounded head of the carriage bolts won't catch on anything, and they make nice glides!
Mikey wrote:Have you tried putting eight DR200s on it yet, as planned? I'm curious if, when you have eight on there, you will have all of the cabinets straight, with no angle on the bottom cabs, since the bottom of the array will then be considerably lower.
I don't have 8! These are the first four. The stands will go 18" higher, so I can get 6 on them and still stay at 6' above ground. As I said in a previous post, you'd need to be on an elevated platform to do 8 and use them as a J array. I would not, however, go any higher. It would be too unstable. The other cabs would need to be hung below, thus, with a 4' high stage the bottom cabs would only need to be 2' high.

And quite frankly, I never see myself using more than 4/side. That's a lot of juice and coverage, Bill rates that at 1,000 people, and we all know his estimates are conservative.
Mikey wrote:What bass bins will you be using with sixteen DR200s? Eight T48s?
If I used 16 of them, it'd be 8 T-39's, 22" wide, 12LF. Bill states that one T-39 will handle 2 DR200's. Pack space is a huge concern, as is storage.

I can see myself using 3 per side on a fairly regular basis. With that, 2 T-39's coupled should be able to keep up. I need to build one more T-39 and make a coupler to try it out.

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Tim A
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#17 Post by Tim A »

SoundInMotionDJ wrote: Can you post a couple additional pics of the tray/bridge? Maybe one with a speaker sitting on it for scale. I can't quite picture how the speaker immediately below the bridge connects to anything in the front.
Here, I just sat them on a table for the pic, but you can see how it works, including my screw-up repairs! Note the stops on the front of the tray for the cabinet to set against. Since the tray speaker is setting straight, the bottom is at a 3 deg angle forward. I was concerned about it slipping, but after assembling the array I don't think it's a problem. Still, for the sake of two pieces of wood it's added insurance. I left the center out so as not to put anything more between the tweeters.

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Bill Fitzmaurice
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#18 Post by Bill Fitzmaurice »

Tim Ard wrote:
bgavin wrote:I know how much surface area four DR280 present to the wind. My thoughts were along the line of trying to put up a big tent in a stiff breeze. There is a lot of sail area there... and I'd had to see you stuck with a product liability lawsuit.
The difference here is a weight versus sail area.
Sandbags.

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#19 Post by bgavin »

Tim Ard wrote:I'm not supplying these to anyone but myself. If a customer wants line arrays, I'll build the cabinets, they can figure out their own stand. If anyone here wants to give it a whirl, that's fine.
Just be careful of your liability. In this morning's paper, some dipshit went to a paint ball range and got herself killed. Now her crusading spouse is suing everybody for warnings on the cans (and a lot of money). There is no end to stupid people who can retain greedy lawyers.
My biggest worry is that when I'm dead and gone, my wife will sell my toys for what I said I paid for them.

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Bill Fitzmaurice
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#20 Post by Bill Fitzmaurice »

bgavin wrote: There is no end to stupid people who can retain greedy lawyers.
Nor an end to greedy lawyers who can represent stupid people.

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DAVID_L_PERRY
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#21 Post by DAVID_L_PERRY »

Good looking build Tim, and good use of existing stands.

But Im confused...
How can you lift the top cabs up so high as a one man lift ??...how tall are you... :shock:

As you know Tim, I have been helping working on loads of different methods of sorting an array hoist, in fact an almost identical tray idea was one of the very first arrangments...great minds and all that.... :wink: (top cab sat on the tray, lower cab hung from the tray...but a different stand arangment)..perhaps send you the drawings at some point.

The reason I moved away from that option was that It is near impossibly to manually lift a single DR280 loaded with Delta Pro drivers and built using Birch ply any higher than on top of a single T48 or typical speaker stand height without significant risk to your back and the local punters...... (Talking about one man settups here). And to try and hang a lower DR single handed without support below just looks impossible.

As far as being a one man settup my conclusion was that the only safe thing to do is to creat something to winch the system up from ground stacked level or very low level. and remove the problem of having to manually lift up the DR cabs above head height.

Nimrods system is fantastic and very similar to most of the line array stands, but is restricted to larger venues/outdoor use only. A genie lift is the ideal solution if you have loads of cash/space in your van, but as most of us have neither of those.....its alternate methods that start to make sense.

Dave

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Tim A
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#22 Post by Tim A »

DAVID_L_PERRY wrote: But Im confused...
How can you lift the top cabs up so high as a one man lift ??...how tall are you... :shock:
The stands aren't cranked up until after the cabs are on. The top cab is 6' high at the outset. Use a stepladder if needed. Cheap and easy to come by.
DAVID_L_PERRY wrote: And to try and hang a lower DR single handed without support below just looks impossible.
Read it again, there is suport to hold the cab up while you're hanging it. It's figured into the system.
DAVID_L_PERRY wrote:Nimrods system is fantastic and very similar to most of the line array stands, but is restricted to larger venues/outdoor use only.
And is expensive, and not easy for most people to come by, hence this 'store bought' arrangement. It's also limited to a lower height than this arrangement by the looks of it.

I can see how a 70lb 280 would be difficult to get on top without some help, but the lighter verson wouldn't be a problem, nor would a 250. Hanging them is easy. If you can lift one 4' high and set it on the support bar you're good to go.

hclague
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#23 Post by hclague »

Tim

Have you actually mixed a band on your DR200's yet? What dsp do you have?

Hal

Mikey
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#24 Post by Mikey »

Well, Tim, now you've done it ... I showed my Son your rig, Nimrod's rig, and told him my idea of a wooden rig, and he started spewing all this shit about a plastic guillotine, pvc tubing, a triangle being the strongest geometric shape, a block and tackle, outriggers, and the weight burden having to be at the bottom of the stack for the least possibilty of tipping over. Of course, I just sat here looking like a deer caught in headlights, and he said, "Let me see what I can come up with for you". LMAO ... isn't it amazing how we know everything as teenagers and then get so damn stupid as we get older? Don't get me wrong, he's a real smart kid, but sometimes he's just so cocky I wanna sock him one. It'll be interresting to see what "Brainiac" comes up with.

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#25 Post by DAVID_L_PERRY »

I get it...had to read it a few more times but the penny has dropped...

Your stands must be a little shorter than my heavy duty wind up stands when retracted.

The stands I use at the moment just for my single DR280's are too high for me to comfortably lift my cab up onto. Its possibly, but every time I do it on my own I damn near kill myself, and I am a 6' fairly strong guy...I know I would never be able to lift a second cab up ontop of the first on my own..

Dave

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Tim A
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#26 Post by Tim A »

Mikey wrote:Well, Tim, now you've done it ... I showed my Son your rig, Nimrod's rig, and told him my idea of a wooden rig, and he started spewing all this shit about a plastic guillotine, pvc tubing, a triangle being the strongest geometric shape, a block and tackle, outriggers, and the weight burden having to be at the bottom of the stack for the least possibilty of tipping over. Of course, I just sat here looking like a deer caught in headlights, and he said, "Let me see what I can come up with for you". LMAO ... isn't it amazing how we know everything as teenagers and then get so damn stupid as we get older? Don't get me wrong, he's a real smart kid, but sometimes he's just so cocky I wanna sock him one. It'll be interresting to see what "Brainiac" comes up with.
Yeah, let's see. I work at an engineering firm and ran all this by the structural guys while in the planning stages. He's right on most counts, a triangle is the strongest gemoteric shape (well, it's really a circle, but..) that's why the legs are made like they are.

PVC would be a bad idea for this.

As these stands are designed to safely lift and hold a 125lb cabinet 10 1/2' into the air with nothing under it, I can safely say that having two of them with the two cabinets hanging as low as 6' is well within their limits.

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#27 Post by Mikey »

Hehehe I said the same thing about the pvc. I'm curious to see what he comes up with, though. He has quite an imagination.

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#28 Post by DAVID_L_PERRY »

I heard this statement the other day and it made me smile.....
"By the time you are old enough to know that your father was right after all, you have a son who knows you are wrong....."

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#29 Post by Mikey »

ROTFLMFAOPMP aint that the truth?!?!?!?!?

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Tim A
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#30 Post by Tim A »

hclague wrote:Tim

Have you actually mixed a band on your DR200's yet? What dsp do you have?

Hal
Sorry, I missed that one.

I've been so busy I haven't even plugged the DR's in yet to see if they work!

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