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In Reply to: Re:quarter-wave posted by V on January 31, 2007 at 12:31:35:
Hi VSo you can’t actually point to a Tapped horn on his site then?
Follow Ups:
MJK tends to concern himself with ideas more than specific implementations. However, the MJK analysis describes the principles used in what you are calling a tapped horn. Not to sound like a broken record, but again, I encourage you to read through his papers if you haven't already.
Hello V,It looks like you do not completely understand what a 'tapped horn' is. Offsetting the driver in a TL is a very old trick, Martin did not invent this. I think the credits for the 'roots' of the Tapped horn go to Jensen with their Transflex design.
Best regards,
Hi WaltI agree about the Transflex, the first time I saw it I thought OMG, it’s nearly a Tapped horn. In modeling the Jensen, the reason it isn’t a modern product came out though.
As you have seen, it isn’t easy to get all the relationships right as there is no written procedure to rely on.
Best,
It really is old news"Sound reproduction"
G.A. Briggs
1953
Yes, perhaps you are right. However, MJK did a very nice job of quantifying things through mathematical analysis. I think some credit is deserved by several people, Jensen, King, Danley, to name a few. By the way, I like what you've done too.
Hi VI don’t belong in “that” list.
Understand, I quit the AES 11 years ago and have not published any papers or references on the Tapped horn other than the White paper and talking about it at trade shows etc..
Other than the explanation in the white paper (which you’ll notice is not at all like Martin’s) and occasionally talking about it on forum’s, that is about it so far as public disclosure.My focus was first seeing if I could exploit “something” I saw with the Unity and Synergy horns, then on making it work well enough to be a product and then getting the most out of it.
My understanding and explanation of how it works, the path to designing them and all the design tools involved were things I derived without outside help / input.
Now, the determination of “if” this is novel is up to the Patent office to decide but the performance of the current Tapped horns compared to regular small bass horns is such that “if” someone else had made it work properly, they certainly would have used it.
Keep in mind the th-115 and th-215 are both smaller / lighter than all but one speaker model tested at a recent Pro-Sound subwoofer shoot out.
http://srforums.prosoundweb.com/index.php/mv/msg/20327/0/16/0/
http://srforums.prosoundweb.com/index.php/t/20399/0/
Arnold Klayman patent number 5, 177, 329 Arnold is 82 now and retired.
I also found another patent that came out about ten months after Klayman's, Hayakawa US # 5, 197, 103 which is similar. Then there is also patent US 4, 064, 966 worth looking at as well. Going back to 1962 you can see another similar patent US# 3. 047, 090 look at fig. # 4. Regards Moray James.
moray james
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