Tweeter selection: Ciare HT263 vs Audax TW025A0

Audax TW025A0 or Ciare HT263 for the mentioned below design?

  • Audax TW025A0

    Votes: 1 100.0%

  • Ciare HT263

    Votes: 0 0.0%
  • Total voters
    1
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svp

svp

Member
Joined 2017
#1
Want to build 2-way medium sized BR speaker with waveguided tweeter. Waveguide will be custom 3D printed and tweeter will be mounted from the back. For this I need a tweeter with completely flat faceplate AND it has to be reasonably priced AND available from THLP (I have little better prices from them). Woofer will be 6.5 inch (closer to 6 than to 7).
SICA 6,5 H 1,5 CP 8Ω
https://sica.it/wp-content/uploads/2021/02/Z004100.pdf
BR box of 15-20L size if that matters, manufacturer recommends ~18 Liters 50Hz tuning, so will stick to smth similar. That woofer according to different data is 88-89dB efficient, so both tweeters will have enough sensitivity. Woofer is already chosen, it is underway from e-shop. I will have pretty deep waveguide to align acoustic centers, so there should be enough sensitivity for 2-5kHz region. For design process I will do full measurements and full simulation with VituixCAD, not sure about the exact crossover, but more or less classic 2nd order for woofer and 2nd-3rd order for tweeter at 2000-2800Hz should work. Nothing extraordinary. That is too early to decide now.

The only two reasonably priced tweeters that suit my needs are:

Ciare HT263
https://www.dibirama.it/home-page/tweeter/646-ciare-ht263-tweeter-1-8-ohm-200-wmax.html

Audax TW025A0
https://www.dibirama.it/home-page/tweeter/211-audax-tw025a0-tweeter-1-8-ohm-110-wmax.html
https://hificompass.com/en/speakers/measurements/audax/audax-tw025a0

Both ~25mm, fabric, both have similar SPL curves, both are priced similar, I do not need extra power of Ciare. Dibirama shows kinda better waterfall of Audax, but the same Audax tweeter on Hificompass does not look good at all. Ciare is a little bit more efficient, which I don't know if is advantage with this design.

Another "bonus" tweeter is Ciare HT261, which looks like inferior brother of HT263.

So, Audax TW025A0 or Ciare HT263 ?
 
#3
I do not know the Ciare but I own a mini speaker with the tw25a0 and a friend of mine has built and sold a lot of two-ways with it back in the '90s. They have a very neutral sound and you can listen to it for hours as they are not harsh at all.
 
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#5
jerome69 said:
Why so old tweeters ?
Click to expand...

There is a limitation in faceplate. There are not much with flat ones. If you want to make a good fit to the part you just printed - flat-to-flat works best. In other case - I have to make some measurements and still "predict" and model waveguide and then still use unnecessary amounts of some insulation material and so on. It is not trivial to make good measurements from that angle. That is unnecessary step with no benefits. For now I will go with one of these.

Yes, now I see, that modern SBA looks better for the same price. You are right.
 
#7
This is my mini speaker: note that I do not know the value of the coil because it was assembled some 30 years ago and I have never modified it, and it's still working.
1740261282602.png

The other one was a real beauty with some interisting solutions: the tw has a kind of WG and is "isolated" from the cabinet by a layer of neoprene and is mounted without screws by means of a lock that presses the tw against the cabinet.
The woofer is a discontinued Audax HM170X0 (TPX cone with inverted surround), IMO the best 6,5" MW in that time.
The filter is similar to my mini speaker (as the designer is the same person...) but the woofer had a zobel to linearise the impedance.
The pic is taken from a website and is not mine.
1740261714686.png
 
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