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12PI plan or CAD ? [message #61195]

Fri, 16 October 2009 15:52

cox-nox
Messages: 2
Registered: October 2009
Location: france

Esquire

first hello everybody,

i just read this post on PSW:
http://srforums.prosoundweb.com/index.php/mv/msg/15490/141095/0/

i didn't know that 12PI was a diy project, i look over the forum but don't find the plan...

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Re: 12PI plan or CAD ? [message #61196 is a reply to message #61195]

Fri, 16 October 2009 20:18

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

Yes, a very ambitious project, one that resulted in a patent for the cooling plug. I sought to improve upon the LABhorn, after some prompting from Tom Danley and Todd Michaels. I believe we accomplished this quite well, with increased durability, greater output, lower distortion and smoother response all from a horn only five inches wider than the LABhorn. If you want the plans, I'll send them to you. We also make flat pack kits and other parts available for sale.

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Re: 12PI plan or CAD ? [message #61201 is a reply to message #61195]

Sat, 17 October 2009 07:04

cox-nox
Messages: 2
Registered: October 2009
Location: france

Esquire

thanks for the answer Wink

first i would like to see the plan(in mm pleaz) and study it a little beat...

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Re: 12PI plan or CAD ? [message #61202 is a reply to message #61201]

Sat, 17 October 2009 08:22

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

You've got mail!

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Re: 12PI plan or CAD ? [message #61280 is a reply to message #61196]

Fri, 30 October 2009 11:22

bitzo
Messages: 5
Registered: October 2009

Esquire

Hi Wayne,
I see your great work on this cab, the spl plot is amazing.
I've some question about the cooling. The plate metal panel it's a great idea and plug too..but...are there some DIY option?
If I use a wood panel is heat too much for the driver?
Could you send me the plans? I want to make some simulation in akabak to get some plot about different way of stacking.

cheers, bitzo

www.unitedroots.it

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Re: 12PI plan or CAD ? [message #61281 is a reply to message #61280]

Fri, 30 October 2009 11:53

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

You've got mail!

You can omit the cooling plug but thermal limits are then less than half what they are with the plug. When used at 30Hz and higher, the limiting factor is thermal, not mechanical, even if cooling plugs are used and most definitely without the plugs. There was some talk years ago that the LABhorn limit was mechanical, and this simply isn't the truth. Those guys were misinformed and fooling themselves. When you see them blown in the field, it's always voice coil burnout, literally melting the adhesive allowing the coil to unravel off the former. So the cooling plugs are cheap insurance against failure.

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Re: 12PI plan or CAD ? [message #61284 is a reply to message #61281]

Fri, 30 October 2009 12:39

bitzo
Messages: 5
Registered: October 2009

Esquire

wow! fear and fire from this cab...
so what is the best way of stacking 4 of this cab? What about Vplating?

cheers, bitzo

www.unitedroots.it

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Re: 12PI plan or CAD ? [message #61285 is a reply to message #61284]

Fri, 30 October 2009 13:12

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

Stacking is usually determined by the environment. One of the best arrangements is all four standing side by side in the center, another is two on two, on their sides. Put the mouths together and lay them on their sides. Then set another pair on top of that, again, mouths together. The cooling system will work even if there is no gap between cabinets but it obviously wouldn't hurt to have an inch or two gap between them.

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Re: 12PI plan or CAD ? [message #61507 is a reply to message #61195]

Sat, 05 December 2009 21:29

NickP
Messages: 1
Registered: December 2009

Esquire

Hi Wayne,

I'm thinking about building a new sub design and interested in the 12pi. Can you send me the plans? I'm in the UK so a flat pack is not really a viable option.

Thanks a lot,

Nick Procktor

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