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JF Vented Horn (P-audio E18-600a) |
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Jake_Fielder 
Old Croc 
Joined: 08 October 2007 Status: Offline Points: 4236 |
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 Posted: 18 April 2008 at 9:22am |
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Wardy, thats some mad sketching skills!
Yeah, im using the free one. I've only spent about an hour on it so far, but i really want to do the internals of my cab correctly to make a proper diagram of it to post on here. So i'll be spending some more time on it in the future...
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ceharden
The 10,000 Points Club 
Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851 |
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Posted: 18 April 2008 at 9:40pm |
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Shame I haven't taken any pics yet but the cab I knocked up today looks rather like those sketches!
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tb_mike
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Joined: 01 October 2004 Location: New Zealand Status: Offline Points: 2744 |
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Posted: 20 April 2008 at 8:42am |
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My main concern would be port tuning/termination. Remember that your talking 3.4m - 8m wavelengths in particular.
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Jake_Fielder
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Joined: 08 October 2007 Status: Offline Points: 4236 |
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Posted: 20 April 2008 at 9:57pm |
Cool, take some pics at some point please!
It seems you beat me to prototyping! i remember you saying you had a ported horn and were interested in the outcome of my design, im too lazy (and poor!)
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Jake_Fielder
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Posted: 20 April 2008 at 9:58pm |
Sorry (again!) i dont get what you're saying...?
Do you just mean that the tuning could be way off that which i have predicted?
I think im going to need to do some fine ( / rough) tuning once its built anyways....
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Jake_Fielder
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Joined: 08 October 2007 Status: Offline Points: 4236 |
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Posted: 13 August 2008 at 11:41am |
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Hey, i have nearly finished the prototype! i started cutting yesterday. I should have it together by tomorrow (maybe).
I have completly re-designed the port so that its alot easier to build, and it should be eaisier to tune to the right freq.
I'll post details at some point....
I now have 4 working drivers, 1 iffy one, 4 trashed ones (i didnt do it) and 1 recone sitting around.
I need six finished cabs in
 EDIT: actually its exactly one month. Edited by Jake_Fielder - 13 August 2008 at 11:42am |
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Jake_Fielder
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Joined: 08 October 2007 Status: Offline Points: 4236 |
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Posted: 19 August 2008 at 10:32pm |
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Prototype:
  I gave it a quick raz tonight and it seemed pretty good (only 200w into it) im gonna work out the tuning tommorrow and get a mate round with a better amp so i can really try it out.
The port might be too small but the only way to find out is to test it.
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breakdabeat pete
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Joined: 10 March 2008 Location: norwich Status: Offline Points: 758 |
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Posted: 20 August 2008 at 12:22am |
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thats not the amp i think it is it
lovley looking box |
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٩(̾●̮̮̃̾•̃̾)۶
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Jake_Fielder
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Joined: 08 October 2007 Status: Offline Points: 4236 |
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Posted: 20 August 2008 at 8:33am |
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unfortunatly so,
i purposefully included it in the picture so that people would comment.
Im should have 4/6 ready in a couple of weeks. You can come listen to them!
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Jake_Fielder
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Posted: 21 August 2008 at 10:07am |
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Meausured impedance plot http://www.freespeakerplans.com/forum/forum_posts.asp?TID=464 If anyones interested..... |
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Mark James
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Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306 |
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Posted: 21 August 2008 at 10:16am |
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aha the impedance peaks and dips might be to do with the small mouth area ie just one cab, maybey it will smooth out in a stack of four or howether many you designed it to be used in. no idea if this is even possible just a thought. Markk. ps did the recone kit and driver go ok????? |
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insert silly sentence here
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Jake_Fielder
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Joined: 08 October 2007 Status: Offline Points: 4236 |
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Posted: 21 August 2008 at 10:51am |
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Havent done the recone yet, im scared of it! im building 4 cabs for an event im doing and i have 4 working drivers, so i'll hold off the recon until i start building my another four after the event. I'll be after 4 more recones then aswell so i'll get in contact at some point. cheers
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ceharden wrote: