Efficient HF horn

[Ilianh]

I am in search of some efficient (98db and up) HF horn that I could cross over at 3000 khz.

Atracted by the low price (student budget) I lean towards the FT17 from Fostex.

But in their datasheet, they do specify that recomended crossing is at 5khz.

looking at their frequency response plot, its ok down to 3000. So could I get away with a 3khz Xo, something steep, like third order?.


If you guys have any sugestions, for Xo's, or even other horns (or any highly efficient smallish tweeters) please let me know.

[Andy G]

either the ksn 1165 or ksn1142/1151 combo will do what you need it to. I know they only say 93dB, but they will easily keep up with drivers like the Eminence Betas which are around 98dB.

http://users.tpg.com.au/users/gradds/piezos.htm

the link will help with a simple x-o network

[Ilianh]

Thanks for the reply, while those tweeters have a good sound when properly used, they are far away from being efficient enough.

I need something in the 98-100 db range even more would be better.

[Andy G]

its in pdf format, and explains why the "apparent" sensitivity of a piezo will match nearly any PA style woofer. After dinner, I'll modify the web page so they can be down-loaded. (ie its food time first !!!)

[Andy G]

the files are actually jpg files, and they are too big for the space left on my web site.

Can you email me an address I can send then to??

btw, what woofer are you using ??

[Ilianh]

mail them to me..
ilianh at yahoo.com
the woofers are altec 601z

but still.. even thought I know some CTS piezos can sound good when used properly. I'm a bit reluctant to use them for something that I want to be the highest quality possible. But, they are so cheap, I could give them a second chance.

off to bed, its 4 am here

[Ilianh]

Ok, so now I have 2 canditates basicly

The fostex FT17H and the peerless 811647 HT100.

The only thing I am scared of, is that the peerless goes to 15khz in the FR on the datasheet.

Both have same efficiency. I need to cross it at 3khz and to have a maximum third order crossover.

Any shared information, either you have used one or heard one, would be greatly apreciated.