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Porn Horn top sketch

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Lasse Lukkari View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Topic: Porn Horn top sketch
    Posted: 24 March 2005 at 8:14am

Remeber this is just a sketch! These are no way ready plans.

http://www.bl-online.org/~lasse.lukkari/porhorn.pdf

Feel free to comment.

If anyone else has any plans for the Porn Horns I really would like to see them.

 

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mobiele eenheid View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mobiele eenheid Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2005 at 9:15am

Rog stated that the driver needs as less rear chamber as possible. My own sims indicate a rear chamber of about 0.6 ltr. So I would build the final chamber as much around the driver as possible.

Perhaps make a vent directly onto the magnet cooling vent for heatdissipation or make the rear chamber out of metal? 

Cheers

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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2005 at 9:22am
Originally posted by mobiele eenheid mobiele eenheid wrote:

the magnet cooling vent

 

SN 12B doesn't have a cooling vent

If i calculated right the original MT122 has about 17,5l. In my sketch it is about 15.2l.



Edited by Vivo
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 24 March 2005 at 12:37pm
I thought the cooling on the SN range was thru the perforated sections around the magnet assembly?

Tony
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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2005 at 5:28am

Originally posted by wilkee wilkee wrote:

I thought the cooling on the SN range was thru the perforated sections around the magnet assembly?

Tony

That is how it's done.

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roborg View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote roborg Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2005 at 4:56pm
Originally posted by mobiele eenheid mobiele eenheid wrote:

Rog stated that the driver needs as less rear chamber as possible. My own sims indicate a rear chamber of about 0.6 ltr. So I would build the final chamber as much around the driver as possible.

Perhaps make a vent directly onto the magnet cooling vent for heatdissipation or make the rear chamber out of metal? 

Cheers



A good way to get really small volumes is to make the rear chamber depth so that the rear panel is coincident with the magnet, then seal around the magnet, the entire back part of the speaker + cooling vent will be outside the cabinet that way, optimal cooling.  I will make the next batch of mid-horns i build this way. 

cheers
  Rob
What I cannot create, I do not understand
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roborg View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote roborg Quote  Post ReplyReply Direct Link To This Post Posted: 25 March 2005 at 5:00pm
i'm thinking of speakers like this 
sn12b, well what can i say, it'll just have to get hot in there, you could always blow cool air at the cone
What I cannot create, I do not understand
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Lasse Lukkari View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lasse Lukkari Quote  Post ReplyReply Direct Link To This Post Posted: 28 March 2005 at 11:02am
I think I'm going to use 6mm alu plates like used in the labsubs.
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Tom Umney View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom Umney Quote  Post ReplyReply Direct Link To This Post Posted: 28 March 2005 at 4:02pm
I remember ages ago seeing a car speaker with a miniture cooling fan bolted with brackets across the vented pole piece. And was rated 2500w rms I think it was Atomic or some make like that.
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