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-   -   Project presentation Horn Almighty (http://www.diyaudio.com/forums/multi-way/170024-project-presentation-horn-almighty.html)

Helmuth 10th July 2010 03:53 PM

Project presentation Horn Almighty
 
Hi music lovers,

I sold my previous speakers the fatboy read this threat.http://www.diyaudio.com/forums/multi...ss-fatboy.html

I was thinking about a dipole project but due the poor efficiency and my plans for a 12 Watt triode amp I decided to build a Horn project.

I had a nice driver who did -3dB at 35Hz! That I had to try.
Here the simulation of the horn mouth output.
http://i220.photobucket.com/albums/d.../simulatie.jpg

Here the design of the box.

http://i220.photobucket.com/albums/d...almighty-2.jpg


Pictures say more than words, here the slide.
http://i220.photobucket.com/albums/d...3/DSC00344.jpg

Picture the size.
http://i220.photobucket.com/albums/d...3/DSC00342.jpg


The goal was a two way an filter at 700Hz. I made al long way form two way to three way and back to two way. About 5 moths of modifying the XO and listen-test and MLS measurements.
Now the XO at 750Hz.
I had the XO scattered across the floor I was modifying and playing music at the same time.:D

http://i220.photobucket.com/albums/d...3/DSC00357.jpg
http://i220.photobucket.com/albums/d...3/DSC00359.jpg

Measurements in the living room. Of one speaker.
The ripple at 200Hz is caused by the back loaded horn principle at disappears on distance. On axes the SPL lifts a bit but of axes it becomes flat. Bleu line is the phase.
20-900Hz Hamming filter, 1/3 oct smoothing,42msec window. above 900Hz rectangle , 1/3smoothing, 5msec window. So this picture is paste at 900Hz to increase the accuracy of the high frequencies. A bit of a diception the horn does -3dB at 45Hz it is very good for a backloaded horn but I had aspect 35Hz.

The average SPL at 1Wmtr is about 102dB/wmtr
http://i220.photobucket.com/albums/d.../gekoppeld.jpg

Stereo measurements at listening position
http://i220.photobucket.com/albums/d...DSC00460-1.jpg

Stereo measurements result on listening position with out any room treatment. The horn helps eliminating the room reflections of the high frequencies.
http://i220.photobucket.com/albums/d...rsindehoek.jpg

The filter
http://i220.photobucket.com/albums/d...3/DSC00463.jpg

I already change it again old picture;) It just fits behind the slide.
http://i220.photobucket.com/albums/d...3/DSC00461.jpg

Here the end result with nature stone food.
http://i220.photobucket.com/albums/d...3/DSC00483.jpg

http://i220.photobucket.com/albums/d...3/DSC00486.jpg

http://i220.photobucket.com/albums/d...3/DSC00466.jpg

http://i220.photobucket.com/albums/d...3/DSC00468.jpg

http://i220.photobucket.com/albums/d...3/DSC00485.jpg


Enjoy

Regards Helmuth :cheers:

Helmuth 19th July 2010 09:53 PM

Some other threats by me.:D
http://i220.photobucket.com/albums/d...3/DSCF0290.jpg

http://www.diyaudio.com/forums/multi...ss-fatboy.html

http://i220.photobucket.com/albums/d...3/DSC00282.jpg
http://www.diyaudio.com/forums/solid...-heaven-2.html

http://i220.photobucket.com/albums/d...3/DSCF0353.jpg
http://www.diyaudio.com/forums/multi...umcone-12.html

And already working on the next project.

RCruz 26th July 2010 09:04 PM

I like all of them but I prefer the 3 way dŽappolito approach. Nasty :)

I see you are a very experienced builder :)

Helmuth 26th July 2010 10:13 PM

Quote:

Originally Posted by RCruz (Post 2254644)
I like all of them but I prefer the 3 way dŽappolito approach. Nasty :)

I see you are a very experienced builder :)

That one wasn't to exspensive 700 euro materials for a set.

SimontY 10th January 2011 03:43 PM

The speaker looks superb and the in-room response is very desirable. Can you please tell us more about the drivers used?

Simon

SimontY 10th January 2011 03:44 PM

I think that 3 way would play rock music quite well!

Helmuth 10th January 2011 04:11 PM

Quote:

Originally Posted by SimontY (Post 2428143)
I think that 3 way would play rock music quite well!

It was my goal to come at 35Hz with a backloaded horn it did not work out. although many would be glad the horn does 45Hz.

When I played "Kraftwerk Radio activity live Londen" I had the experience that the bas rolled towards me like a wave, so power-full. They give a live like experience.
YouTube - Kraftwerk - Radioactivity

I now use a set that plays down to 30Hz and has a very nice sound to it. I made the neighbors drive mad when listening to the 102dB system, with a little power they play so loud and clean i didn't notice the walls where shaking. My neighbors don't complain to fast but the horns are very loud and sound as big as they are loud.
I have to compare them now only thing there so big and quit heavy that it is a problem to move them.

SimontY 10th January 2011 04:14 PM

Poor neighbours!!! :D

From what I've heard in good clubs I really like horn bass. I think it's probably a terrific solution for medium/big rooms. I think OB is the only way in a smaller room, though, personally.

102dB is incredible sensitivity!

Helmuth 10th January 2011 04:21 PM

Quote:

Originally Posted by SimontY (Post 2428203)
Poor neighbours!!! :D

From what I've heard in good clubs I really like horn bass. I think it's probably a terrific solution for medium/big rooms. I think OB is the only way in a smaller room, though, personally.

102dB is incredible sensitivity!

Yes with the 40W Vfet amp playing at 20W it would be about 115dB.


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