DIY MDF tractrix horns and frontloaded horn systems

[Angelo888]

hi

today my first midbass horn got ready. It is painted with poliurethan PU, black satin , which leaves a raw surface.

mouth size is 38" / 96cm diameter, and thorat 4" /10cm.

Weight is approximately 130kg.

Fc is 145hz, and 125hz at half space.

I will use it between 150hz and 700hz, with Fane Studio 8M driver,
in my next hornspeaker system, full frontloaded, 4 way.


Angelo







more pictures at Audio Voice Acoustics forum :

http://www.audiovoice-acoustics.com/...read.php?t=227

[nafanja]

Tell me please.\

Do you make the tweeters with sencitivity near 96 db and frequency near 18-20 kHz?

[Angelo888]

hello Nafanja

sensitivity and power response depends more of the driver used. A horn gives usually a gain of 3 - 6db, while it functions as a acoustic high and lowpass filter. In the 18 - 20khz region, a horn has no function anymore, the wavelength are too short.

Angelo

[Angelo888]

hi all

some time since i posted last time at this forum.

here my finished system. I don't think there is more room for improvement, after some tweaks in the last few month - i am very satisfied with the result now.

here the thread at my forum with full description of the system:

http://www.audiovoice-acoustics.com/...read.php?t=405

[Cobra2]

WOW!!!

Arne K

[Angelo888]

hi all

a few month ago i got a deal at ebay, and took the chance to buy and try a pair of Vitavox AK154 woofers. They were at pretty bad shape, so i restaured and refurbished the cones. I replaced a pair of Beyma 15" LX60's woofers with it. The difference is quit remarkable. I wrote some comments at my forum :

http://www.audiovoice-acoustics.com/...p?t=195&page=3

Angelo

[Spectral Morn]

hi all

some time since i posted last time at this forum.

here my finished system. I don't think there is more room for improvement, after some tweaks in the last few month - i am very satisfied with the result now.

here the thread at my forum with full description of the system:

http://www.audiovoice-acoustics.com/...read.php?t=405

I'll second that wow and raise you with a WOW!!!!!

Thats a lot of speakers, how does it sound ?


Regards D S D L

[Angelo888]

best to let talk someone else than me, that heard my system :

see the last post :

http://www.audiovoice-acoustics.com/...read.php?t=650

and :

http://www.audiovoice-acoustics.com/...=2479#post2479

translated :

Sunday, the 23 of August , i and fellow Edison Freire had the opportunity to meet in the city of Aracaju, Mr. Angelo and his system.
Consisting of a beautiful amplifier SE, Italian, and a set of Loudspeaker based Horns and Sub woofers.
I confess that I was very impressed with the refinement of the construction of the speaker system . All MDF, it has a finish worthy of the best Italian lutiers, which demonstrates that its builder, Angelo himself, brings into the vein, the art of the great Italian designers of all time.
The sound is an impressive naturalness and an incredible sensitivity.
I think it is right of every audiophile one day be able to see and hear such a system.

Isaac Sandes

[Angelo888]

hi guys

its a couple of years, i don't post at this forum. Here a update of my system:
I replaced Coral H104 tweeter with Beyma TPL-150 Air Motion Transformer mid/tweeter , with a wave guide made by my own.

Here how the system looks like today :



this is the inroom frequency response graph, measured at 1m distance from the speakers:



more pictures and descriptions, at my forum :

http://www.audiovoice-acoustics.com/...=5136#post5136

Angelo

[Magna Audio]

Look great.
I was toying with the idea of a big wood lathe but went down the conical path (for the time being at least...) The upper mid I build was so good I thought I'd apply it to all horns and see.
Are you considering a tapped horn? I have found they integrated well once sorted (I originally had crossover and Zobel issues) they work really well doing nice deep bass support on normal stuff and where there is sub bass you hear that too. They are fast too not ponderous booming away.

What frequencies are you crossing at? What efficiencies do you have / measure?
Do you find that sound coming off the tweeter hitting the backs of the other horns and interfering a bit to be a problem? I experimented with acoustic absorption there and found it beneficial. Cleans the already pure horn sound up a little further. 5 way really is the way to go I think.

Do you have one amp and L-pads? I still use passive crossovers but use 5 amps, one per channel and level adjust on the line side.

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