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Where is the throat in this plan?
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kpippen View Drop Down
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Joined: 04 July 2007
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Points: 174 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kpippen Quote  Post ReplyReply Direct Link To This Post Posted: 07 December 2007 at 11:42am
Hi Mike,...Those were my best estimates...but I think they are pretty close... It would be very difficult to get exact numbers without drafting it in AutoCAD and getting the exact deminsions... However,...last night I drafted the Punisher so I could get the exact parameters for modeling... I plan to post them because it seems like there is always someone asking if another driver will work... I also found the exact parameters for the Labsub to use for comparison...
 
Cheers,
 
Kev 
turn on, tune in, drop out


Hey Nipper,...we gotta have more cowbell!!!
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schiller View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote schiller Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 11:02am
Originally posted by JaKe JaKe wrote:

Could you post screen captures of your hornresp.

JaKe


As soon as i find out why i cannot put a link to my webspace in my message.
Konstantinos
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schiller View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote schiller Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 11:12am
Here are the sims of the 186 horn in Hornresp. Modelled as hyperbolic, but the issue with the front chamber remains the same for exp or conical sections.

http://users.forthnet.gr/ath/schiller/186_Horn.htm
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kpippen View Drop Down
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Points: 174 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kpippen Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 1:58pm

Schiller,

Excellent work!... Your SPL plot appears to be very similar to the one I did (illustrated on page 2)... At the very least,...it would be safe to say that this design is very acoustically stable and has plenty of room for construction variables...
 
Kev
 
   


Edited by kpippen - 11 December 2007 at 2:33pm
turn on, tune in, drop out


Hey Nipper,...we gotta have more cowbell!!!
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Jake_Fielder View Drop Down
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Points: 4236 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jake_Fielder Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 4:25pm
Yeah cheers schiller, that'll come in handy when i eventually download hornresponse and give it a whirl with 1850 figures, its just the rear chamber thats different right?? I think its 68Ltrs??
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schiller View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote schiller Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 7:01pm
Originally posted by Jake_Fielder Jake_Fielder wrote:

Yeah cheers schiller, that'll come in handy when i eventually download hornresponse and give it a whirl with 1850 figures, its just the rear chamber thats different right?? I think its 68Ltrs??


Hi, yes the rear chamber is the only difference, but is smaller, somewhere between 20-30 Lit.
I want to build it with a 15er driver, in order to go higher with the responce - 300Hz is my target. Modelling with conical sections (as constructed) makes no big difference. I don't think that is an exp. desogn, it is too long.
Normally with the 1850 the throat should be smaller, simulate it 400cm^2 and see.

Greetings
Konstantinos
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Mark James View Drop Down
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Points: 5306 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2007 at 9:58pm
YOU WILL NOT get 300hz out of the 1850 no matter what you do to it, its a folded horn and quite a severly folded [for upper response] horn if your aimint for a heigher response.
id put a kick box above it, straight 15" horn above the 1850 would play nicely<300hz or heigher
just my halfe crowns worth.....
insert silly sentence here
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Jake_Fielder View Drop Down
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Points: 4236 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jake_Fielder Quote  Post ReplyReply Direct Link To This Post Posted: 13 December 2007 at 7:48am
Originally posted by schiller schiller wrote:

somewhere between 20-30 Lit.
 
Really!? Im sure I read a really old thread where people were saying its 68/69 litres, but I did find that hard to believe as they were also saying the driver takes up 7 litres, it looks to take up way more then a tenth of the space in the rear chamber.....??
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mstep77 View Drop Down
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Points: 457 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mstep77 Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2008 at 4:48pm
http://www.speakerplans.com/forum/forum_posts.asp?TID=14046&PN=10
Check out rog's post it should help some people
Also this post is usful i think
 
Matt
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