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Better x12 plans? |
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wafflesomd 
Young Croc 
Joined: 21 September 2007 Status: Offline Points: 811 |
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 Topic: Better x12 plans?Posted: 07 August 2008 at 1:08am |
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So from looking at the x12 plans on the homepage, how is anyone supposed to build these?
Anyone have better plans. Possibly with some actual measurements.
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Deadbeat
Old Croc 
Joined: 12 March 2008 Location: Singularity Status: Offline Points: 3167 |
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Posted: 07 August 2008 at 7:50am |
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Rog very helpfully gives us guidelines, it's like the MT122 - you have to draw it out to figure out the cutsheet and everything. Google sketchup or an easy CAD like Turbo would work well here.
I would also suggest putting the woofers at the top and bottom and fitting the horn in between to get an MTM arrangement, the ports can be moved anywhere. Try to get the woofers as close together without making the front baffle structurally unsound. |
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Away on extended leave.
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darkmatter
Old Croc
Joined: 26 February 2005 Location: LDN Status: Offline Points: 2425 |
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Posted: 07 August 2008 at 11:27am |
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As above, plus you'll need your SOH CAH TOA trigonometry rules.
I based the 12+1 monitors I'm building on Rog's X12, worked out the internal volume, removed a 12" driver. Changed the trap angle simply cos my saw goes in per degree increments rather than having a 10.5. Changed to slot ports to make it easier and they add natural bracing etc. etc. They're a good starting point but you're free to experiment a bit to get exactly what you want. |
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Static Age
Old Croc
Joined: 14 November 2005 Location: Oxfordshire Status: Offline Points: 1652 |
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Posted: 07 August 2008 at 11:58am |
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its pretty straight forward. I built a pair a couple of years ago, just drew the cut list by hand on paper in a few minutes.
sorry, i dont have the list anymore.
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Risc_Terilia
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Joined: 15 December 2007 Status: Offline Points: 689 |
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Posted: 07 August 2008 at 12:55pm |
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I don't think you need trig, he gives you one angle, the one on the other side is obviously the same so you have enough to work out the other angles just subtracting them from 360.
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norty303
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Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8806 |
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Posted: 07 August 2008 at 1:41pm |
Apart from the fact you're using 2 triangles, is that not in fact trig?
In the top view, if you draw a line down from the 10.5deg angle you create a right angle at the baffle. the angle to the right of this will be 79.5deg.
We know that the internal length of this line is 372 (438 - [18+18+30])
you can then plug these into something like this to get the rest of the dimensions/angles
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My laser stuff: Frikkin Lasers
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wafflesomd
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Joined: 21 September 2007 Status: Offline Points: 811 |
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Posted: 07 August 2008 at 5:01pm |
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I can't imagine building the mt122 off the plans on the site :/
The part that gets me is that it gives the total depth of the cabinet, but the pieces heading back, are at an angle. Edited by wafflesomd - 07 August 2008 at 5:02pm |
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Deadbeat
Old Croc
Joined: 12 March 2008 Location: Singularity Status: Offline Points: 3167 |
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Posted: 08 August 2008 at 5:02am |
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That's where trig comes in my friend. or CAD, if you are confused.
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Away on extended leave.
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wafflesomd
Young Croc
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Posted: 08 August 2008 at 5:54am |
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I'm just going to see if there are any other designs to accommodate my drivers.
Seriously, those plans suck compared to most. |
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norty303
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Joined: 18 August 2004 Location: Eastbourne Status: Offline Points: 8806 |
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Posted: 08 August 2008 at 9:03am |
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Seriously, if you can't work out how to build them with the information provided then maybe you're better off with Lego or something. Saying the plans suck because you can't be bothered to calculate or work out the dimensions is a bit strong to be honest. I posted the numbers that you needed to plug into the calculator to give the internal length of those side pieces. Then just add the width of 2 pieces of ply (36mm) and how much it extends in front of baffle (30mm). Or as someone else has said, mark it out on the piece of wood that you use for the base and measure that actual dimensions.
Your other option is to work out the total volume of the cab and just make it square without the angles, but with the same volume. Then you know the exact sizes.
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My laser stuff: Frikkin Lasers
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breakdabeat pete
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Joined: 10 March 2008 Location: norwich Status: Offline Points: 753 |
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Posted: 08 August 2008 at 4:57pm |
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get a calculator, pen and pencil out my friend
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٩(̾●̮̮̃̾•̃̾)۶
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Grinner
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Joined: 02 December 2005 Location: essex Status: Offline Points: 407 |
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Posted: 09 August 2008 at 2:11am |
have you got the lego plans if its easier
 a brick by brick no.
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I don't think you need trig, he gives you one angle, the one on the other side is obviously the same so you have enough to work out the other angles just subtracting them from 360.