Ciare PT383, Seas U18RNX/P crossover opinions needed

[paulha]

Hi everyone,
I am planning to build a 2-way floor standing speaker using the following drivers
Tweeter: Ciare PT383
Mid/bass: Seas U18RNX/P
Box size 34L, bass reflex, port length 140mm diameter 58mm

I tried simulating a crossover in LspCAD 5.25 and have found a possible solution, see picture. But I am not sure if it is ok.
It was really difficult finding a good linear fit, the only one that looked good was a 2nd order 1300Hz LP and a 3rd order 2600Hz HP network.
I have only adjusted the values of the components a little so that they fit standard components which can be purchased.

Thank you in advance for any opinions/suggestions
Paul H

You will also find the frd and zma SPL and imedance data files for these drivers attached in the zip file.

[ermes]

first of all change the ciare tweeter, to my taste is horrendus

choice seas tweeter for example

bye

[paulha]

Hello Ermes

I already have two of these Ciare tweeters, so that is why I am thinking of using them.
Have you listened to speakers using them?
/Paul H

[ermes]

ok, i understand.
yes i used most of the speakers in the market, including ciare (also the tweeter model you have).
i never like them.
why you don't try to sell them, before starting with a new project ?
then you can buy tweeter (i suggest seas for perfomance/price) that interfaces well with your Seas U18RNX/P

let me know

[Helmuth]

Looks like a perfect build tweeter. So ermes may be something else was wrong when it didn't sound right.
Source troelsgravensen site.








thd

[Helmuth]

Ciare MT320 is even nicer very nice smooth pole piece drill through.
Ciare looks really like highest level stuff see that step response looks like a ribbon tweeter.





thd

[ermes]

not always excellent projected productcs sounds good !
keep this in mind.
those measurements are more optimistics : does anyone measured the same tweeters ?
to me ciare tweeters sounds very bad.
So you are free to take your decision.

[paulha]

Thanks for your opinion,

I think that I will try the Ciare PT383 after all but I will create an insert in the box for the tweeter so that I can easily change it. The inserts will have different diameters for different tweeters.

With the Ciare PT383 you can use a low cross over frequency, I like that.
I have used SEAS tweeters a couple of times before, they sound ok but are definately not perfekt. My different Dynaudio tweeters always sounded better, but those are not available for DIY anymore.

I may also try these tweeters:
Seas 27TDFNC/GW
and
SICA LP90.28/N92 TW (I have a pair of these also)

/Paul H

[Helmuth]

Originally Posted by ermes

not always excellent projected productcs sounds good !
keep this in mind.
those measurements are more optimistics : does anyone measured the same tweeters ?
to me ciare tweeters sounds very bad.
So you are free to take your decision.

I want to believe you but how can a product that reproduces with out harmonic distortion very good step repose and resonable flatness sound bad.

We have :

Lineair distorsion.
Harmonic distosion.
Step response.
Water fall.
Off axes.
power compression

If these things are good it can only be a good driver.

Or come up with the factor that explains the poor sound. Other wise it become a "yes no" discussion.

[ermes]

i leave in your opinion.
however think about the driver is not only a jam of perfect parameters...
i repeat "those measurements are more optimistics : does anyone measured the same tweeters ?"

about low crossover point : 38mm with 1khz...not so good....how you can go down ???