Hello!
I see the Avantgarde Acoustic midrange XO is entirely based on the natural rolloff of the horn and driver, mainly due to the compression ratio at the horn throat.
Doesn't this lead to the typical "horn honk" one gets from using the horn all the way down to it's cutoff frequency? Instead of crossing an octave above, which is the typical recommended approach.
How do they get around this?
I see the Avantgarde Acoustic midrange XO is entirely based on the natural rolloff of the horn and driver, mainly due to the compression ratio at the horn throat.
Doesn't this lead to the typical "horn honk" one gets from using the horn all the way down to it's cutoff frequency? Instead of crossing an octave above, which is the typical recommended approach.
How do they get around this?
The ones I've heard (Uno, Duo and Solo) all had obvious horn-coloration. But they don't use traditional compression drivers which probably are a little more forgiving in this regard.
Do you have a link to some documentation about this? I knew they pushed their horns very low, but wasn't aware that they didn't have electrical attenuation at all.
Do you have a link to some documentation about this? I knew they pushed their horns very low, but wasn't aware that they didn't have electrical attenuation at all.
Page 13 - "The CDC system"
http://www.avantgarde-acoustic.de/d...allgemein/bookofhorns/en/book_of_horns_en.pdf
http://www.avantgarde-acoustic.de/d...allgemein/bookofhorns/en/book_of_horns_en.pdf
I believe they use both acoustic high and low cutoff (front chamber & flare cutoff) with their horns in conjunction with a series cap - The midrange in the trio is a community 4" compression driver and it needs more then the cutoff of the horn to protect it, same with treble driver. It is common to build horn multiways like this and in correct designs little to no honk
I sent several e-mails back and forth with Armin Krauss (AG) a coupple of years ago regarding the XO of both Duo and Uno. He admitted that the Duo, which have a Kugelwellen horn (pretty similiar to LeCleach), had a cut-off at about 225Hz. If I remember correctly the XO's high pass of the woofers is about 170hz. So as you see, this shouldn't be possible. It should sound like crap. There is no doubt in my mind that AG has made some hugh compromisses here. Why? Because an "all the way" horn system would be way to big for commercial sales. To meet the woofers at 170hz clean, that means an octave above cut-off, which is desirable, would mean a kugelwellen horn of over 1 meter in diameter.
So, how come people like them so much anyway? I have no idea.
To answer your question, Defo. They don't get around this physically spoken, but a lot of people don't seem to care. I am not sure I do either.
So, how come people like them so much anyway? I have no idea.
To answer your question, Defo. They don't get around this physically spoken, but a lot of people don't seem to care. I am not sure I do either.
- Status
- Not open for further replies.