Project presentation Horn Almighty - diyAudio
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Old 10th July 2010, 03:53 PM   #1
Helmuth is offline Helmuth  Netherlands
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Default Project presentation Horn Almighty

Hi music lovers,

I sold my previous speakers the fatboy read this threat.big bandpass The fatboy

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.
Click the image to open in full size.

Here the design of the box.

Click the image to open in full size.


Pictures say more than words, here the slide.
Click the image to open in full size.

Picture the size.
Click the image to open in full size.


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.

Click the image to open in full size.
Click the image to open in full size.

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
Click the image to open in full size.

Stereo measurements at listening position
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Stereo measurements result on listening position with out any room treatment. The horn helps eliminating the room reflections of the high frequencies.
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The filter
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I already change it again old picture It just fits behind the slide.
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Here the end result with nature stone food.
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Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


Enjoy

Regards Helmuth

Last edited by Helmuth; 10th July 2010 at 03:56 PM.
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Old 19th July 2010, 09:53 PM   #2
Helmuth is offline Helmuth  Netherlands
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Some other threats by me.
Click the image to open in full size.

big bandpass The fatboy

Click the image to open in full size.
V-fet Repair of a WEGA V4810 solid state heaven

Click the image to open in full size.
High-end 3 way dáppolito with aluminiumcone

And already working on the next project.

Last edited by Helmuth; 19th July 2010 at 09:56 PM.
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Old 26th July 2010, 09:04 PM   #3
RCruz is online now RCruz  Switzerland
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I like all of them but I prefer the 3 way d´appolito approach. Nasty

I see you are a very experienced builder
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Old 26th July 2010, 10:13 PM   #4
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally Posted by RCruz View Post
I like all of them but I prefer the 3 way d´appolito approach. Nasty

I see you are a very experienced builder
That one wasn't to exspensive 700 euro materials for a set.
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Old 10th January 2011, 03:43 PM   #5
SimontY is offline SimontY  United Kingdom
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The speaker looks superb and the in-room response is very desirable. Can you please tell us more about the drivers used?

Simon
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Old 10th January 2011, 03:44 PM   #6
SimontY is offline SimontY  United Kingdom
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I think that 3 way would play rock music quite well!
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Old 10th January 2011, 04:11 PM   #7
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally Posted by SimontY View Post
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.
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Old 10th January 2011, 04:14 PM   #8
SimontY is offline SimontY  United Kingdom
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Poor neighbours!!!

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!
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Old 10th January 2011, 04:21 PM   #9
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally Posted by SimontY View Post
Poor neighbours!!!

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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