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Porn Horn top sketch |
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Lasse Lukkari 
Young Croc 
Joined: 09 March 2004 Location: Finland Status: Offline Points: 615 |
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 Topic: Porn Horn top sketchPosted: 24 March 2005 at 8:14am |
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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
Old Croc 
Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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Posted: 24 March 2005 at 9:15am |
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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
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Joined: 09 March 2004 Location: Finland Status: Offline Points: 615 |
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Posted: 24 March 2005 at 9:22am |
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
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Joined: 02 August 2004 Location: West Midlands Status: Offline Points: 4840 |
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Posted: 24 March 2005 at 12:37pm |
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I thought the cooling on the SN range was thru the perforated sections around the magnet assembly?
Tony |
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Lasse Lukkari
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Joined: 09 March 2004 Location: Finland Status: Offline Points: 615 |
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Posted: 25 March 2005 at 5:28am |
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That is how it's done. |
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roborg
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Joined: 05 July 2004 Location: United Kingdom Status: Offline Points: 1026 |
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Posted: 25 March 2005 at 4:56pm |
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 |
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What I cannot create, I do not understand
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roborg
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Joined: 05 July 2004 Location: United Kingdom Status: Offline Points: 1026 |
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Posted: 25 March 2005 at 5:00pm |
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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  |
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What I cannot create, I do not understand
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Lasse Lukkari
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Joined: 09 March 2004 Location: Finland Status: Offline Points: 615 |
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Posted: 28 March 2005 at 11:02am |
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I think I'm going to use 6mm alu plates like used in the labsubs.
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Tom Umney
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Posted: 28 March 2005 at 4:02pm |
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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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mobiele eenheid wrote: