Horn for dome tweeter

[Hylle]

I would to hear about experinces with designing a horn for a dome tweeter, how it is done.

Or do you know of somewhere there is a description on how in general you can have a good result with it?

I am not thinking of a waveguid, I would like to make the tweeter go louder.

[rcw]

Here is an article I wrote on the subject.
Practical DIY Waveguides - Part 1

rcw

[Patrick Bateman]

Originally Posted by Hylle

I would to hear about experinces with designing a horn for a dome tweeter, how it is done.

Or do you know of somewhere there is a description on how in general you can have a good result with it?

I am not thinking of a waveguid, I would like to make the tweeter go louder.

It doesn't make it louder - it focuses the tweeters energy into a narrower beam. That increases SPL on axis, but only over a limited bandwidth.

That's why an inexpensive compression driver and waveguide is a far superior option. Celestion and Selenium have excellent models for under $60.

With a compression driver you get improved power response, better directivity, and higher efficiency than a dome.

[Hylle]

I have not tried a compressiondriver in a hifi system, dont they sound nasal and shouting? The compressiondriver plays into a chamber before sound is released, does that not make the sound resonat, it´s that what you can se on a compressiondrivers impedance responce, it has a lot of peaks?
My gole is to have a well sounding driver like a dome, but it will have to keep that also when you play a little loud, i feel hifi dome very quickly becomes stressed when you just play a little loud.

[skeptic43]

Originally Posted by Hylle

I have not tried a compressiondriver in a hifi system, dont they sound nasal and shouting? The compressiondriver plays into a chamber before sound is released, does that not make the sound resonat, it´s that what you can se on a compressiondrivers impedance responce, it has a lot of peaks?
My gole is to have a well sounding driver like a dome, but it will have to keep that also when you play a little loud, i feel hifi dome very quickly becomes stressed when you just play a little loud.

Visit this thread AK Design Collaborative - Econo-Waveguide Speaker - AudioKarma.org Home Audio Stereo Discussion Forums
over at audiokarma.com. With over 7500 posts, coming up on 400,000 views and over 50 systems built, it seems they've got a winning combination of Selenium compression horn and inexpensive waveguide that is used to mod/upgrade old loudspeakers. Anyway, there's lots of test data from the e-waveguide guru, Zilch in support of the concept.

[tinitus]

I bet this little Supravox isnt a compression driver
TW2-20 SUPRAVOX

[gedlee]

Originally Posted by Patrick Bateman

It doesn't make it louder - it focuses the tweeters energy into a narrower beam. That increases SPL on axis, but only over a limited bandwidth.

That's why an inexpensive compression driver and waveguide is a far superior option. Celestion and Selenium have excellent models for under $60.

With a compression driver you get improved power response, better directivity, and higher efficiency than a dome.

Half right here John. The "sensitivity" can be increased, but the power response is not really affected so much. What happens, as you say, is that the axial response begins to match the power response, which pushes up the axial sensitivity at the lower frequencies of the pass band.

Originally Posted by Hylle

I have not tried a compressiondriver in a hifi system, dont they sound nasal and shouting? The compressiondriver plays into a chamber before sound is released, does that not make the sound resonat, it´s that what you can se on a compressiondrivers impedance responce, it has a lot of peaks?
My gole is to have a well sounding driver like a dome, but it will have to keep that also when you play a little loud, i feel hifi dome very quickly becomes stressed when you just play a little loud.

You have not heard a modern compression driver in a modern waveguide I guess. Things have changed a lot. Just look at the reviews of my systems and you will see that a compression driver is no longer the problem it used to be.

[Hylle]

I should probably try a compressiondriver. I can see that they are popular on this forum for hifi. Earl, can I buy just the horn/wave guid from you. What does It cost, and do you know what it will cost to send to Europe? Where in frequency do you cross over to the 15" driver?

[peterolsen]

Hello Hylle.

Take a look at www.troelsgrevesen.dk

best regards

Peter

[gedlee]

Originally Posted by Hylle

I should probably try a compressiondriver. I can see that they are popular on this forum for hifi. Earl, can I buy just the horn/wave guid from you. What does It cost, and do you know what it will cost to send to Europe? Where in frequency do you cross over to the 15" driver?

I am not interested in selling just waveguides anymore. Its not a viable business. I sell "simplified" kits for sale in Europe since sending the woofer drivers makes little sense. Contact me off line if you are interested.