THAM10 thoughts
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Category: Plans
Forum Name: Other plans
Forum Description: Discussion / Questions about all the other plans
URL: https://forum.speakerplans.com/forum_posts.asp?TID=47959
Printed Date: 26 March 2026 at 8:27pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: THAM10 thoughts
Posted By: martinsson
Subject: THAM10 thoughts
Date Posted: 29 January 2011 at 8:58am
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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/" rel="nofollow - http://www.martinsson.cc/blog/ |
Replies:
Posted By: MattStolton
Date Posted: 03 February 2011 at 5:17pm
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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!! ------------- Matt Stolton - Technical Director (!!!) - http://www.wildingsound.co.uk" rel="nofollow - Wilding Sound Ltd "Sparkius metiretur vestra" - "Meter Your Mains" |
Posted By: martinsson
Date Posted: 04 February 2011 at 5:53am
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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/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: jamwa
Date Posted: 04 February 2011 at 9:23am
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keep going. love the idea hope you pull it off... ------------- Sound, Light, Projection, Display, Cameras and production support |
Posted By: TDA-Audio
Date Posted: 05 February 2011 at 12:54am
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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 ------------- horns plans http://photofile.ru/users/tda-audio/ |
Posted By: martinsson
Date Posted: 05 February 2011 at 7:59pm
     ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: martinsson
Date Posted: 01 March 2011 at 10:45am
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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/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: bitzo
Date Posted: 01 March 2011 at 10:49am
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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 ------------- http://www.unitedroots.it - United Roots SoundSystem site |
Posted By: mykey-
Date Posted: 01 March 2011 at 11:38am
http://img24.imageshack.us/i/23647063.png/"> ------------- BbbBBRAAAAPppBBBBbgushhhhhhhhssshhhhhGrAbRAAAAAAPPPPPp = Dubstep |
Posted By: martinsson
Date Posted: 06 March 2011 at 10:50pm
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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 - 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/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: mykey-
Date Posted: 07 March 2011 at 2:31am
that was a waste of a thread, how many other forums did you post on? ------------- BbbBBRAAAAPppBBBBbgushhhhhhhhssshhhhhGrAbRAAAAAAPPPPPp = Dubstep |
Posted By: martinsson
Date Posted: 07 March 2011 at 6:15am
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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 ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: MattStolton
Date Posted: 07 March 2011 at 10:10am
I like Mykey's idea. Stops the last bend being a 180°, and makes it 2 x 90°. It also maintains the expansion rate right to the horn mouth, based on previously the expansion being fine until it entered the drivers rear "chamber", where it suddenly stepped. @ martinsson: No idea what it would sim or actually sound like, but the principle seems better, with a nice linear expansion, rather than a sudden jump into the volume in the driver's rear chamber. I understand that you are trying to use every single piece of volume in the small box, as path length, but I would have thought a sudden change in path area, would be more audible and compromise efficiency more than less volume used for path length, but in a more linear manor. These triangular voids seem to be almost unavoidable , and crop up in a lot of designs. Helps brace the side panels at the very least, and , if filled with dead foam, shouldn't resonate. @ mykey: Would there be any measurable/audible benefit of rounding over the internal edge of the last bend (i.e round off the bottom-right corner of the triangular void). I'm just thinking a sharp edge in the horn path may lead to artifacts, or would this be so small not to be really audible/measurable. Similar question from the other bends, end of sheets, with square corners, again any worth in simply rounding them over, or not worth the effort? Basically, is diffraction about a corner significant? ------------- Matt Stolton - Technical Director (!!!) - http://www.wildingsound.co.uk" rel="nofollow - Wilding Sound Ltd "Sparkius metiretur vestra" - "Meter Your Mains" |
mykey- wrote:Posted By: martinsson
Date Posted: 07 March 2011 at 11:10am
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I agree to a point, it's not at all a bad idea, rather the oposite, it does look very good, my thinking is that in such a compact design as this volume is in short supply, and given the choise I went for a proven concept of folding that i know since before, something i feel I can "relate to" in the simulationwise vs. reality department.
This is not to say that it is in anway better, I want to make that perfectly clear, sofar we are still in the theoretical domain, and i had to apply the breaks at some point, given the time and money i would make these two and then compare, but as usual...
This is my proposal, just so we have something on the same page to compare with.
 The "new feature" in the THAM10 is that the steps in the folding goes all the way from the begining to the end, at each corner i intentionally made a step up in cross section area, this step expansion grows towards the end, but in differance to the THAM6 and THAM15 wich all share the same step in the end, this one has them from the begining, and they are all combined wih the angle expansion aswell.
If you look at the picture carefully you can see this, and if you where to look at what the expansion would look like when "folded out" I think this resembles the hornresp way of simulatiing in a better way, again this is not to say that it is the best way, it is just the way i choose to do it.
Best regards / martinsson ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: mykey-
Date Posted: 07 March 2011 at 12:12pm
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" it is just the way I choose to do it." ------------- BbbBBRAAAAPppBBBBbgushhhhhhhhssshhhhhGrAbRAAAAAAPPPPPp = Dubstep |
Posted By: mykey-
Date Posted: 07 March 2011 at 12:17pm
well done  I've been to Sweden, I was there for half a day ------------- BbbBBRAAAAPppBBBBbgushhhhhhhhssshhhhhGrAbRAAAAAAPPPPPp = Dubstep |
Posted By: TDA-Audio
Date Posted: 19 March 2011 at 4:52pm
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my version 12"
------------- horns plans http://photofile.ru/users/tda-audio/ |
Posted By: mikey bear
Date Posted: 19 March 2011 at 6:00pm
| lovely stuff! |
Posted By: FlipC
Date Posted: 20 March 2011 at 9:49am
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Ha That is so close to my mini clone. And I am in awe of the wood quality! Those sheets look so perfect... |
Posted By: martinsson
Date Posted: 24 March 2011 at 7:56am
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Nice build!
That's based on an erlier proposal i belive, and modified to fit the 12", obviously, I also see that you shortened the vertical panel in the front chamber, wich is a nice way to even out the otherwise rather large step up in area that was a potential cuse for concern.
Theoretically it does seem to be a bit agressive regarding compression, have you kept the S1-S2 of the 10" proposal ? I don't know if that is an issue in real life, my thinking is that you allready looked at this and found it acceptable.
Are the outer dimensions changed (apart from the front grip extrusion and width) ?
Great work !
Any comments on the preformance ?
Best regards / Anders ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: t.geessounds
Date Posted: 24 March 2011 at 6:47pm
| can these build out of 1/2 plywood or mdf ??? cause i might be wrong but 15mm is alittle over 1/2 right?? |
Posted By: djeddie
Date Posted: 24 March 2011 at 10:27pm
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12mm is normally what is known as 1/2" 15mm is normally what is known as 5/8" Hope that helps. ------------- Chas n Dave : it's like Drum and Bass but with beards. E=mc² ±3dB |
Posted By: t.geessounds
Date Posted: 25 March 2011 at 2:28am
| ya i figer that much but here in the US i dont think i have ever see 5/8plywood |
Posted By: _djk_
Date Posted: 25 March 2011 at 3:56am
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You buy it at a real lumberyard, not a Home Depot like place. ------------- djk |
Posted By: t.geessounds
Date Posted: 25 March 2011 at 11:43am
| ok djk thanks guess i have to go look for a lumberyard in my area |
Posted By: TDA-Audio
Date Posted: 26 March 2011 at 4:20pm
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\\\\Ha That is so close to my mini clone. And I am in awe of the wood quality! Those sheets look so perfect...\\\\\\\\\\\ \\\\\\Nice build! very hi level pressure... detaled and mesurmed late.... ------------- horns plans http://photofile.ru/users/tda-audio/ |
Posted By: rish
Date Posted: 28 March 2011 at 3:30pm
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hi all. is there a plan for a tham18. have 2 faital pro 18 inch speakers. looking to put them to use. |
Posted By: martinsson
Date Posted: 29 March 2011 at 6:44am
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The THAM family of TH's sofar only include 6,5", 10" and 15" designs, but you can extrapolate these designs to fit other size of drivers using hornresp to make sure you get a good result.
These are the "orignal" THAM designs :
THAM6 - http://www.martinsson.cc/blog/index.php?m=02&y=10&entry=entry100220-210031 - http://www.martinsson.cc/blog/index.php?m=02&y=10&entry=entry100220-210031
THAM10 - http://www.martinsson.cc/blog/index.php?m=03&y=11&entry=entry110306-224208 - http://www.martinsson.cc/blog/index.php?m=03&y=11&entry=entry110306-224208
THAM15 - http://www.martinsson.cc/blog/index.php?m=07&y=09&entry=entry090721-180410 - http://www.martinsson.cc/blog/index.php?m=07&y=09&entry=entry090721-180410 ------------- Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/" rel="nofollow - http://www.martinsson.cc/blog/ |
Posted By: Jack1991
Date Posted: 31 December 2023 at 2:35pm
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Looking to build a "all in 1" portable speaker. The bass section being a Tham10. Do you think it would be ok to use 12mm Baltic Birch Plywood instead of 15mm? Looking at B.B plywood weight the difference between the two and 12mm is around ~25% lighter. I don't know enough to understand if the extra horn space will make much difference in reality or not. I guess its 2 lots of 3mm so 6mm extra horn space. Or a mix of the 2. All the internal sections 15mm so to keep the horn path the same. But just the other sections sides and externals use 12mm plywood so to reduce the weight.
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