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Hedlund horns mod

195.29.253.66

Posted on April 29, 2000 at 13:40:58
My first post here, I didn't even know there is HUG Asylum. Anyway, a week ago I finished Hedlund horns with few modifications to original design. John posted link to it in one of previous conversations (thanks John), but here it is again, for those not following all the threads:

http://www.adminsoft.ch/Hedlund/HedStart.htm

Best from Croatia,
Miroslav

 

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Your version of the Hedlunds are absolutely beautiful., posted on April 29, 2000 at 21:04:16
Dave VH


 
Congratulations. I like to see someone without access to the vast array of choices that we have in the U.S., still manage to create a beautiful system and involving high-efficiency tube audio system.

I hope to move to more efficient single-driver speakers in the future, and enjoy the same kind of pleasure that you now have with your new system.

Dave van Harn

 

Absolutely stunning! A work of art! (nt), posted on April 30, 2000 at 09:29:20
Jeff Day


 
nt

 

Re: Hedlund horns mod...Excellent in every way!, posted on April 30, 2000 at 09:56:42
Gariver


 
Hello Miroslav!

Congratulations! Your version of the Hedlunds are beautiful. They are also better than the original Hedlunds in reproducing sound. As they say, where there's a will, there's way! And your way is the best way.

I really like the way you approched this project. You had your doubts about using solid wood for all those curves. Smart man! So you went looking for another solution, one that would be beneficial to the sound. Well, Kruno's advice was right on target: Wood veneers! A great mod! Veneers are stiffer and less resonant than solid wood. They are also less prone to movement with changes in temperature and humidity. The most important benefit of using veneers is this: It's easier than working with solid wood! I mean, all you need is a ruler (straight edge) and a mat knife (or veneer saw). Thus, you avoid making odd-angle, difficult cuts in solid wood with a table saw! That's crazy, if you ask me.

If this was soccer game, the score would be: Croatia 3, Sweden 1. I give Jan Hedlund credit for the design of the speakers. But I give you a higher score for achieving much better sound and picking a much easier construction method. The latter is rather important for DIY speaker builders.

A little bit of advice...
Kruno used a biscuit joiner machine to glue the panels together. However, the space between the biscuits is too long. I would put the biscuits closer to each other to add strength. The width of a hand seems right (3" or 70 to 80mm). Think of this as a form of insurance! It is also a way to avoid problems. Since the biscuits are very inexpensive, it will not add too much to your costs.

Another point...
Walnut and oak are good choices for veneers. However, never pick oily woods for your wood veneers. Oily woods are notoriously difficult to glue, and you need special epoxies (such as G2 brand) to glue them. This is something to keep in mind to avoid problems in the future.

OK, Miroslav! That's it! Once again, congratulations on a job well done. I hope you continue building speakers with Kruno. Maybe you can try variants of other designs as well (Carfrae's Little Big Horn?). Whatever you do, always keep in touch with the people of Audio Asylum.! We enjoy and appreciate your posts! Good luck to both you and Kruno!

My best regards,
Gariver
San Juan, Puerto Rico

 

Re: Hedlund horns mod...Excellent in every way!, posted on May 1, 2000 at 00:25:25
Gariver,
thanks for constructive post. I know (almost) every existing horn out there, but for first project wanted to do something that at least has some shemes, drawings and details. For future, who knows, maybe I do my own calculation and own design. With Kruno, I'm on the safe side, because I know he will do what we put on paper.
This was our first project with something like this and it was long time ago when I started analyzing this horn and making plan of action. For both of us this was an adventure, where both of us have learned a lot. Considering what we could have done wrong, it was well planed and for future we just have some minor things to solve. More bisquits is one of those minor things (although horns are so stiff, dead, non-resonant, that this is just 'to be sure'). There is also small thing, which is to resolve problem with terminals/cables position. I have some good ideas about this and Kruno agrees.

Best,
Miroslav

 

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