plan measurements

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Keryn O'Shea
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Joined: Sat Jan 26, 2013 5:50 pm
Location: Brisbane, Australia

plan measurements

#1 Post by Keryn O'Shea »

Hi, keen to order plans for various horns, just wondering if they are available in metric measurement? I'm australian and so over the horrible things that pass for enclosures here!
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L

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Harley
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Re: plan measurements

#2 Post by Harley »

Welcome Keryn.
Keryn wrote: I'm australian ....
It's Ok....we understand.....it wll turn out fine in the end :mrgreen:
ImageSemi-retired: Former Australia and New Zealand Authorised BFM cab builder.

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Rune Bivrin
Posts: 521
Joined: Tue Aug 19, 2008 5:42 pm
Location: Stockholm, Sweden

Re: plan measurements

#3 Post by Rune Bivrin »

I feel your pain, but the best option is really to get a few steel rulers with inches on one side and metric on the other. Translating the measurements turn them into really ugly numbers. But you can always display the SketchUp models in metric if so inclined.
In build order:
O12 with no tweeter.
3 x WedgeHorns.
2 x Jack 10 without tweeters.
2 x DR250.
2 x 16" T39
1 x Tuba 24
2 x SLA Pro (sort of...)

Grant Bunter
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Re: plan measurements

#4 Post by Grant Bunter »

G'day Keryn,
And Welcome :)
Happy Aussie day weekend!

I'm a bit fortunate, I was raised on the cusp of metric and imperial, but I understand.
Go to your local big markets (if you have such a thing lol), buy a 40 inch steel ruler for no more than $30. Now you can do the plans in inches and stop all that conversion issue...

If you turn the ruler over it will be in mm.

Yep, you can use sketchup to go to mm if that's all you know.
However, if you don't know mm and inches:
1 inch = 25.4mm
1/8" = 3.2mm, or .125 inches (err 1 divided by eight = .125)

ps we're not serial killers, please put your location in your profile and a local Aussie might be able to help, or let you get to listen to some of Bill's designs before your own build...

If you get stuck, give me a yell :)
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...

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kekani
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Location: Kapolei, HI

Re: plan measurements

#5 Post by kekani »

One of the things that helped with my Jack110Lite Speed Build is the use of a Measuring Stick, aka Story Stick.
Just make absolutely sure that your Measurements are correct because everthing wll be based on it.

When I get around to more cabs, I'll make up one of these all the time.
Wedgehorn 6 (x2)
Jack 110 Lites (x2)
XF212 (Egnater style)
DR200 ASD (Yes! Finally!)

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Bas Gooiker
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Re: plan measurements

#6 Post by Bas Gooiker »

Hey Keryn, welcome to the forum.
What kind of cabinets are you looking at? Subwoofers, tops or fullrange?
Rune Bivrin wrote:I feel your pain, but the best option is really to get a few steel rulers with inches on one side and metric on the other. Translating the measurements turn them into really ugly numbers. But you can always display the SketchUp models in metric if so inclined.
+1
Hard to find an imperial ruler in the civilized world, but they are out there. As you progress during your build at some point it will start to make sense to you.
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Rune Bivrin
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Location: Stockholm, Sweden

Re: plan measurements

#7 Post by Rune Bivrin »

I found my steel rulers (and my freedom) at Hornbach. Somehow it makes sense to manufacture these things with both systems, one on each side. That gets you a global product with minimal extra cost.
In build order:
O12 with no tweeter.
3 x WedgeHorns.
2 x Jack 10 without tweeters.
2 x DR250.
2 x 16" T39
1 x Tuba 24
2 x SLA Pro (sort of...)

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LelandCrooks
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Re: plan measurements

#8 Post by LelandCrooks »

I even use them with it on both sides. Some things are easier in the metric system. But not all, imperial has some advantages. Mostly I can do it in my head.
If it's too loud, you're even older than me! Like me.
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Charles Jenkinson
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Location: Manchester, UK

Re: plan measurements

#9 Post by Charles Jenkinson »

FWIW, I think combined resolution and accuracy are easier and quicker in a base 10 metric system, but i also like how Bills plans (at least the few I have) don't use increments of less than 1/8", which makes application of the inch system straightforward.
2xJ12L (3012HO) switchable/melded
2xT30

Words&graphics - Audio&Acoustics - Hardware&DSP; 3 different paradigms.

Keryn O'Shea
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Location: Brisbane, Australia

Re: plan measurements

#10 Post by Keryn O'Shea »

Harley wrote:It's Ok....we understand.....it wll turn out fine in the end :mrgreen:
As outsiders, how do you guys view the human race? :wink:
Bas Gooiker wrote:What kind of cabinets are you looking at?
Gday mate, nearly all of them as it turns out!
Bas Gooiker wrote:As you progress during your build at some point it will start to make sense to you.
Still nothing...
LelandCrooks wrote:I even use them with it on both sides.
That was the key for a while at the start to get used to inches, it was like trying to think in another language.
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L

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BrentEvans
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Re: plan measurements

#11 Post by BrentEvans »

LelandCrooks wrote:I even use them with it on both sides. Some things are easier in the metric system. But not all, imperial has some advantages. Mostly I can do it in my head.
Metric is easier to add and subtract, since it's all decimals and each dimension is ten of the previous. Imperial is easier to divide, since many of the dimensions are based on 12 (or a multiple of 12). This makes divisions by 1/2, 1/3, 1/4, 1/6, 1/8, 1/12, 1/16, 1/24, 1/32 (etc) easy. Sure we leave out 1/5 and 1/7 and 1/9 but I've never needed a seventh or ninth in anything but music chords and the truth is, if you need a fifth of something you're probably going to be drunk very soon and don't need to be using power tools so it doesn't matter anyway.
99% of the time, things that aren't already being done aren't being done because they don't work. The other 1% is split evenly between fools and geniuses.

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FrankORandle
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Re: plan measurements

#12 Post by FrankORandle »

Use an online converter with your plans at your side and start converting numbers and writing the metric numbers on your plans next to the English measurements. You will have to change things like 24 1/2 to 24.5, 24 3/4 to 24.75 and so on.

https://www.google.com/webhp?sourceid=c ... entimeters
2-TTLS w/Dayton RSS265HO-4 10" Reference HO Subwoofer

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Bill Fitzmaurice
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Re: plan measurements

#13 Post by Bill Fitzmaurice »

FrankORandle wrote:Use an online converter with your plans at your side and start converting numbers and writing the metric numbers on your plans next to the English measurements.
Or do what it says in the plans and measure the parts in your Sketchup models with the readout in metric. :roll:

Keryn O'Shea
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Location: Brisbane, Australia

Re: plan measurements

#14 Post by Keryn O'Shea »

FrankORandle wrote:writing the metric numbers on your plans
Yep, tried that, got bored of it real quick!

So I just bought
Grant Bunter wrote:a 40 inch steel ruler
and got on with
Bill Fitzmaurice wrote:what it says in the plans
Well, y'no.... I've made a few mistakes ay!
AT8 14", AT10 19", T30 28" LAB12, T48 36" 3015LF, THT 20" LAB15, SLA 4x3"/4x4", CArray 6x4", TLAH, TLAP, J10 FA, J12 FA, OT8 CD, OT12 FA, OT15 CD, SLAP 2x6"/4x6", WH8, DR280 MA, XF210. Next J10L

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Harley
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Location: Christchurch, New Zealand - Authorised BFM Cab Builder

Re: plan measurements

#15 Post by Harley »

Keryn O'Shea wrote:
Harley wrote:It's Ok....we understand.....it wll turn out fine in the end :mrgreen:
As outsiders, how do you guys view the human race? :wink:.
With our eyes...
ImageSemi-retired: Former Australia and New Zealand Authorised BFM cab builder.

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