What are the pros & cons of high-efficiency horns?

[morricab]

What drivers are you guys using on your mid bass right now and what have you tried on your journey?

Supravox 215-2000...in phase III might consider other options but at 99 dB it’s about the smoothest one out there with this kind of sensitivity and it is still not AER money.

 

[bonzo75]

703 also have a deviating radiation pattern compared to JMLC, so I wouldn´t mix them
when I refer to JMLC I have the full rollback version in mind
excellent aerodynamics and smoothes horns I´ve heard

Can you show a pic of what you mean by. roll back, is that what prevents it from beaming?

 

[Blue58]

And if anyone missed the release of this weighty tome, here’s the link. Available on Amazon too.
http://kolbrek.hornspeakersystems.info/index.php/blag/35-the-horn-book
Perfect reading for cold winter nights.

 

[kodomo]

And if anyone missed the release of this weighty tome, here’s the link. Available on Amazon too.
http://kolbrek.hornspeakersystems.info/index.php/blag/35-the-horn-book
Perfect reading for cold winter nights.

Its a 100% buy but is not out yet on online shops afaik

 

[morricab]

Can you show a pic of what you mean by. roll back, is that what prevents it from beaming?

I believe it is to minimize diffraction at the edge of the horn mouth.

 

[christensenleif@msn.com]

I tried with 2001 and decided I prefer the extra tweeter there.

2002 is in another league imo
much more refined and also more extended than 2001
we´ve tried with ET-703, but disadvantages kills advantages imo

 

[christensenleif@msn.com]

I believe it is to minimize diffraction at the edge of the horn mouth.

correct and very effective
we´re talking aerodynamics
it let´s the airflow better off the outer edge of the hornmouth

 

[christensenleif@msn.com]

Its a 100% buy but is not out yet on online shops afaik

I think they prioritize the ETF members in Belleme in Normandie in November 14-17th before the launch

 

[christensenleif@msn.com]

 

[bonzo75]

This is what I heard with Bjorn's driver, it was a JMLC from Hans Steffen, had a similar roll back

 

[morricab]

correct and very effective
we´re talking aerodynamics
it let´s the airflow better off the outer edge of the hornmouth

I don’t think the air velocity at the mouth is very high so to me it is less about airflow turbulence and simply more about sound waves diffracting off of a sharp termination.

 

[bonzo75]

So when would you use an Iwata or a tad radial horn for a TAD driver

 

[Blue58]

Its a 100% buy but is not out yet on online shops afaik

Then just to keep Bonzo in the loop there’s this :-
https://www.grc.com/acoustics/an-introduction-to-horn-theory.pdf

 

[Audiophile Bill]

And if anyone missed the release of this weighty tome, here’s the link. Available on Amazon too.
http://kolbrek.hornspeakersystems.info/index.php/blag/35-the-horn-book
Perfect reading for cold winter nights.

Yes been waiting for this to appear for sale. Still not available afaik.

 

[christensenleif@msn.com]

So when would you use an Iwata or a tad radial horn for a TAD driver

never
both have serious reflections due to height/width relation is not ideal
we cnd´d a huge Iwata, but it all stranded on that

 

[christensenleif@msn.com]

in front of my BD bass towers and Trio

 

[bonzo75]

This is a great thread. Moral of the story is, keep away from Marchand and you will do well DIYing

 

[jdza]

This is a great thread. Moral of the story is, keep away from Marchand and you will do well DIYing

No the moral of the story is that nothing is perfect and there is no such an absolutist thing as What's Best in audio. Before I landed with Iwata i bought plastic round horns ,had wood round horns turned, i bought more fancy plastic round horns with Mick Jagger lips. I had a pair of something made that would not be out of place in a Dali painting. I absolutely hated the sound and was ready to walk away back to my Tympanis.

Carolus here persuaded me to have an Iwata made. The square one, that is the one so derided above. Before even hooking it up, my wife spoke through it. That was it. That was my horn. You heard Carolus's didn't you?

 

[bonzo75]

No the moral of the story is that nothing is perfect and there is no such an absolutist thing as What's Best in audio. Before I landed with Iwata i bought plastic round horns ,had wood round horns turned, i bought more fancy plastic round horns with Mick Jagger lips. I had a pair of something made that would not be out of place in a Dali painting. I absolutely hated the sound and was ready to walk away back to my Tympanis.

Carolus here persuaded me to have an Iwata made. The square one, that is the one so derided above. Before even hooking it up, my wife spoke through it. That was it. That was my horn. You heard Carolus's didn't you?

I loved Carolus system.

The Marchand comment was aimed at micro for leaving DIY over the Marchand advise

 

[Robh3606]

"Also simple crossovers and simplicity works better than complexity though surely there can be a 1 in a 1000 case where all 6 ways come together to produce great sound. More likely it fails "

Hello bonzo75

That is not necessarily the case. How do you define a simple crossover?? Part count?? Order?? In my mind it's the minimum part count required to reach the design goals. It depends on many factors one of the most important being the type of horn and the individual drivers used in the system. CD horns require a compensation network to flatten the response where an exponential does not as an example. That compensation network adds complexity but is absolutely necessary. Part count is not what determines the transparency of a network its good design that counts.

Rob