High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

Return to High Efficiency Speaker Asylum


Message Sort: Post Order or Asylum Reverse Threaded

Bill H Re:your isophon horn design

161.184.44.40

Posted on April 25, 2000 at 12:01:35
Dear Bill: I am getting confused by same name but different design horns where different people are the same name but are actually referring to a different design. Could you help me and give a URL which shows an actual drawing of your Isophon Horn(not a photoof the outside of the box) or if thats not possible then send a dimensioned drawing? I would also be interested in your comments on this your latest project. Thank you regards Moray James Campbell.

 

Hide full thread outline!
    ...
I built one but Thorsten suggested it. He da man!(nt), posted on April 25, 2000 at 16:48:57
Bill H.


 
nt

 

How do you think about it?, posted on April 26, 2000 at 05:28:17
Bill:

What driver did you use? And material did use for those arc places? How do you like it?

Thanks,

Michael

 

Re: Bill H Re:your isophon horn design, posted on April 26, 2000 at 05:56:04
Here you go: the plan in pdf

 

Re: How do you think about it?, posted on April 26, 2000 at 07:26:09
Bill H.


 
Hi there!

I used the RS 40-1197 driver. First I tried it with an open baffle and the sound was dominated by the very good mids but very harsh highs. Bass was lacking and too soft(mushy). In a ported box, it really sounded like a cheap speaker. I didn't even try to adjust anything. Hopeless. I then put it in a 1/4 wave TL. Just a PVC tube stuffed with Acoustastuff and tuned by ear. This sounded fantastic. The bass and mids integrated perfectly. If the highs can be tamed it would make a very pleasent speaker, especially for vocals.

The Isophon horn sounded like the TL only better. More bass. Fuller mids but still the shrill highs. My listening room (16' by 14') is very bright so I will mess with room treatments before tweaking the cone. Listening off axis helps but the soundstage becomes Bose-like. Everywhere-nowhere. Sounds like mono.

I made the arcs with formica instead of paper indicated in the plans. After building-up one side, I nailed in brads where the edges of the arcs should be. Fitting the formica, the tension of the bend kept them in place. I then filled the void with expanding-foam. This held everything in place and the brads were removed. lastly,I sprayed the surface of the formica with automotive undercoating so it wouldn't reflect the higher frequencies.

One side is screwed in and removable. I will mess with interior tweaks after I get a decent sound-card and can measure what I'm doing. Right now it's cut and try, hit and miss.

So far it seems like with enough tweaking, it's a good design to squeeze the most out of a small driver. Easy to build(for me), cheap and looks cool even un-finished. Try it you'll like it.

happy building,
Bill H.


 

Thanks (nt), posted on April 26, 2000 at 11:45:21
.

 

Page processed in 0.015 seconds.