Tweeters: your opinion please!

Hi there!
I am thinking of replacing my old Accuton tweeters (C23 / 6) with soft dome tweeters.
I'm strapped for cash so at the time I would have identified these 3 products, but I'm obviously open to evaluating alternatives in the same price range:
Morel CAT 308
Morel CAT 328
Scan Speak D2905 / 9500
The tweeter will be crossed around 2.5k / 3K with an Accuton C79 / 6 midrange.
I aim for a natural and transparent sound, compatibly with the cost.
What do you think? I have been away from the transducer market for many years, so I have no experience with relatively recent products.
Any of your comments could be useful to me.
Thanks
 
9500 is like 30 years old construxtion.

I would look for the following in your case:
SB Satori (cheaper and better than 9500)
Wavecor TW30 series
Scan Speak 913000 (so called HDS tweeter).

Alternativelt Scan Speak D3004 /602010
 
What’s wrong with the C23’s?

It's hard for me to explain it in a language (English) that isn't mine, but I try.
In some respects I like the sound of the C23 / 6, but for other reasons I like it much less.
Its sound tends to be a bit aseptic, and I have always known a certain inability to reveal details in the portion of the spectrum below the high range. Pinch of violins, faint sounds of small percussion, certain sounds seem planed away from this tweeter, and I struggle to find a technical / scientific explanation. Ferrofluid with too aggressive action perhaps ?, I don't know.
 
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Taking in account your very good explanation of flaws of sounding, I would advise you the Satori TW29TXN tweeter. In my opinion, this is the best for your upgrade. You will be lucky🙂
Don't recommend ScanSpeak D2905/9500 and 9130. Morel CAT378 could be quite good here. ScanSpeak D3004/6020, Satori TW29DN, TW29B are okay too.
 
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After 18 years of ceramic domes, i would like to return to soft domes for some time... 🙂
Corundum is fascinating, but it seems too good to be true at those prices.
However the peak at the breakup looks pretty wild, it worries me a bit. 😱
 
The ferrofluid on those C23's may have run dry. If you are about to discard of them anyway, first try to fix that. Others must have tried this. Check this link for global instructions.

Changing to another tweeter requires adjusting the crossover. That in turn requires being able to measure acoustic and electric properties, so you have to have access to measuring equipment and have to know how to use it.

Simply spending a few hundred € at some fancy tweeters will give results, but it's like changing a recipe for a delicious pasta without knowing which ingredients you are throwing in.
 
Changing to another tweeter requires adjusting the crossover. That in turn requires being able to measure acoustic and electric properties, so you have to have access to measuring equipment and have to know how to use it.

This is obvious. I have been standing still for years but my hobby has always been this: designing and manufacturing loudspeakers.
I'm prepared for the work that goes with replacing the tweeter.
 
After all it could be also the break-ups of the ceramic mid and not the tweeter. And one can notch the impedance resonant peak of the tweeter if FF has dried ?
+1 for the SB stac despite it is FF. I haven t though listened the peereless which is no FF and should have a lot of details theorycally.

Proven good sound of soft dome for good monney too Audax 1.2"TW034 and pereless soft dome ultra cheap dx25tg.
 
No, it's not a midrange issue.
These days I'm just using an old D28/2 instead of the Accuton C23/6 out of curiosity, and for the most part the problems I complained about the Accuton have been solved.
It's not even a drying problem of the Accuton ferrofluid. Comparing the impedance module measured today with that measured in 2004, no significant alterations are noted. It is precisely the character of that tweeter that it's not my cup of tea.