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martinsson View Drop Down
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    Posted: 29 January 2011 at 8:58am
Hello all

I'we previously given 15" TH's a try (THAM15), and 6,5" as well (THAM6), and it struck me that there's one pice missing, something in between the Large and Small so to speak, and here is my sugestion :


Now, remember, this is a work in progress...

When loaded with the B&C 10NW64 the 2PI response at 1W looks like this :


The input window :


To show off, and really get the graph nerds going this is the response in 0.5PI 1W :


I want to post this in order get your take on it, remember it is still in development but i have reached a state where i feel it is prudent to go public with my findings in order to get some feedback.

Best regards // Martinsson
Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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MattStolton View Drop Down
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I have been looking at your blog over the last few weeks, and am liking the ideas.  

I have no idea how to improve them, however, but carry on!!

I am hoping to be getting a table saw very soon, and then some wood to turn to sawdust, to join in the fun!!



Edited by MattStolton - 03 February 2011 at 5:18pm
Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains"
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martinsson View Drop Down
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Points: 325 		Post Options Post Options   Thanks (0) Thanks(0)   Quote martinsson Quote  Post ReplyReply Direct Link To This Post Posted: 04 February 2011 at 5:53am
Thanks Matt, I try :) hopefully the THAM10 will turn out allright, and if you feel that the current state of development is good enough then by all means go ahead, I'm not sure how much further i can push it given the dimensional contranints, i at all, but I'll surely try.
 
There is a proposal wich remains to be given a serious look at, it's basicly the same box, only with a reflector and distans plate added, see the blog for a picture, if this will make things better or not remains to be figured out.
 
Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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jamwa View Drop Down
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keep going. love the idea hope you pull it off...
Sound, Light, Projection, Display, Cameras and production support
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TDA-Audio View Drop Down
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good idea Andreas ... my like... i try- ))   

my be recalculated 12" version ??? 


my be this drivers



http://www.faitalpro.com/products/schede/hps.php?id=201040110

or

http://www.paudio.ru/downloads/SL10.pdf

http://www.paudio.ru/downloads/TM10.pdf

http://www.sicaspeakers.com/s10k3.html

http://www.sica.it/pdf_ftp/Z005840.pdf

http://oem.ciare.com/it/296/339/prodotti.php








Edited by TDA-Audio - 17 February 2011 at 3:03am
horns plans http://photofile.ru/users/tda-audio/
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martinsson View Drop Down
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Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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martinsson View Drop Down
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I have to confess that i do not fully grasp how to properly simulate this folding, especially the last step where the driver is located, my approximation acc. to the input window above, is not accurate enough, and the real result may differ significantly from that shown above.

Exactly how I should takle this is not yet clear to me, maybe it is that simple that the folding i here propose is not at all suitable, it does kind of stand out from traditional TH foldings, and this may not turn out allright.
 
If you have some idea about this i would really like tot ake part of it, my thinking is that i do not want to trick anybody into building this and then finding out that the real world result is no where near the graphs shown here.
 
So be cautious, and do not take this for the truth, it is mearly a work in progress where i have reached a point that needs some ironing out, or possibly a complete overhaul designwise.
 
Best regards // martinsson
Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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bitzo View Drop Down
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I know how to.
in the cubo12 script I solved this issue.
check this http://www.freespeakerplans.com/index.php?option=com_jfusion&Itemid=64&jfile=viewtopic.php&f=38&t=1185&start=10
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mykey- View Drop Down
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martinsson View Drop Down
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Thanks anyway mykey and bitzo, but i decided to go back to the drawing board, once again, and redesign them using a folding i know very well.

This is my final proposal for the THAM10 design :

http://www.martinsson.cc/blog/index.php?m=03&y=11&entry=entry110306-224208

Best regards // martinsson
Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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Points: 6119 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 07 March 2011 at 2:31am
that was a waste of a thread, how many other forums did you post on?
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martinsson View Drop Down
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Waste of a thread ? Why do you feel this is a waste ?
 
Different people visit different forums, and I get valuable feedback from here aswell as the others, when i finaly settle on something I simply can't asume that all of them finds this thread, I therefore share this with other forums, is this wrong ?
 
Your proposal is sound and I have looked at this aswell, but I felt that adding more dead space (volumes taken out of the complete system volume) in and allready cramped design may not be for the best, but I could be wrong so I did take it under serious consideration and as i stated I'm grateful for the effort, but I left it out based on a gut feeling that more volume in the system would probably be better in the end, but again, who is to say I'm right about that ?
 
Nothing is so good that i can't be improved, and what is to say that this, my final proposal, is the way to go ? nothing, but it may provide a startingpoint for someone else, or provide ideas for another designer looking at a simillar concept.
 
I tried alot of different ways to fold, angle, and expand in this tiny volume, but the more exotic things god the more i realized that i was not up to the task of propoerly simulating them, showing a good enough result, this folding is proven, it will work in a close enough manner to that showed in the simulations, if my previous designs who share the same folding is something to go by that is, and that is the most stable asumption i can provide at present.
 
/ martinsson


Edited by martinsson - 07 March 2011 at 6:25am
Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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