adding tweeters to full range speakers.

[legendaryfrog]

this morning when i finished my FR speaker, using the TB 3 inch bamboo driver with a needle enclosure. immediatly, i was unsatisfied with the high's. could i add a tweeter to go from about 18000 hz-25000? I'd prefer not to modify anything with the driver, and just make a crossover for the tweeter. would this be possible?

thanks

 

[Spasticteapot]

this morning when i finished my FR speaker, using the TB 3 inch bamboo driver with a needle enclosure. immediatly, i was unsatisfied with the high's. could i add a tweeter to go from about 18000 hz-25000? I'd prefer not to modify anything with the driver, and just make a crossover for the tweeter. would this be possible?

thanks

Yep. Just find the appropriate value of capacitor to result in a high-pass filter at about 16-18khz, and add a suitably high-frequency tweeter.

 

[Geoff H]

It's possible, but I doubt you will hear the difference. Our hearing doesn't go that high. If the speakers sound dead up top, they will be lacking from a much lower frequency.

 

[Geoff H]

Also, check this

http://www.diyaudio.com/forums/showthread.php?s=&threadid=47403

 

[legendaryfrog]

well thats true how we cant hear that high, but would it be ok for the woofer and tweeter to merge frequencies?

that means i'd set the tweeter to about 13000 hz-above without modifying anything with the driver so both the tweet and woofer do the freq's between 13000 - 20000hz? or wil it sound bad?

 

[Nordic]

Well if its new drivers they certainly deserve a few days to settle and loosen up a bit.

 

[legendaryfrog]

i left them playing overnight.

 

[Cal Weldon]

LF,

Try using a small inexpensive tweeter with a 1uf cap.

 

[legendaryfrog]

from my calculations, to acheive a crossover point of 15000 hz in a 1st order system i should use a 1.325 uf capacitor. ill try it out when my tweet comes.

 

[Godzilla]

http://www.zillaspeak.com/Crossover.asp

Have fun!

I think you will hear additional treble by adding a super tweeter! I do.

Godzilla

 

[PeteMcK]

tweeter tweaking

yeah, try a few different values of cap until you get the sound you like...

 

[legendaryfrog]

thanks

 

[gychang]

does the piezo tweeters require crossover?

thanks,

gychang

 

[Cal Weldon]

Piezos are a different bird. Let's not go down that route, he has some dynamic tweeters on order he said.

LF,

Yes, order a bunch of 1 and 2uf cap. Then you can series and parallel to your hearts content.

 

[JandG]

Try many differant cap values..

use test clips & don't be affraid to go .47 or even .22uf. I use .22uf on ribbons, & fools me into more air..with green cone Saba's..but is it really my imagination.? to deep in there 1st order & you mess up your image & other things, easy to tell where you like it. test clips are my best friend.

 

[Godzilla]

>>> does the piezo tweeters require crossover?

It does to sound best. Without crossover it will play full blast and scare the bugs and dogs away. What needs to happen for hi fidelity is to reduce its output to only the top octaves. All you want the piezo to do is add ‘air’ to the presentation. It will barely sound like it’s on even with your ear close to it.

Piezo impedance is very high. By adding an 8 ohm resistor the amp sees a more normal 8 ohm load. Changing the resistor changes the overall output of the piezo.

http://www.zillaspeak.com/piezo.asp

Peace,
Godzilla