And again a Tweeter question

[ChocoHolic]

I still have some Dynaudio 15W75 Esotec (8 Ohm version) on hand and want to make some nice small satelite speakers with them.
The most typical choice for the tweeter would of course be some 28mm Esostar, but they are not sold anymore and expensive like hell.
Next traditional choice would be the Morel MDT-33...

But to be honest, I am not fan of ferrofluid at all. In the beginning ferrofluid is great, of course.... But after some years?! I remember some Audax midrange speakers, which I used in the early 90s. After about 8 years the ferrofluid had moved into the cone paper....
Once burned fingers... I am now looking for a suitable tweeter without ferrofluid. For example the Seas No Ferro 650 is looking not so bad for me. Any experiences with that?
Also other proposals are highly welcome.

Bye
Markus

[Dave Bullet]

Good independent CSD / harmonic distortion testing can be found here:
http://www.zaphaudio.com/tweetermishmash/

and:

http://www.markk.claub.net/Testing/testing.htm

Both Mark and Zaph (John) are respected builders / testers.

Cheers,
David.

[v-bro]

I successfully removed the ferrofluid from several tweeter magnets. If you take a piece of normal printer A4 paper you can suck it all up. It can be tricky to remove the dome from the magnet though....

It did reduce distortion levels quite dramatically!

[ChocoHolic]

Thanks for these great links. Unfortunately my browser is in trouble with displaying Mark's measurements....
From Zaph's measurements I start to like the Peerless 810921. And it seems to be without ferrofluid, nice. Hm, I would need to reduce the level by 3-4db..
Unfortunately I have no idea how these measurement results should look in order to please my ears....!
I know that my ears are very often happy with Dynaudio systems. Always when I am going to listen to different speakers, in the end one of the top three is Dynaudio. Some people say they sound boring and mud..., my ears say they sound decent. Usually there is not a big 'Yeah-Effect' at the beginning, but the longer I listen the more I enjoy them. This is exactly the opposite from what I observed with most other systems. Especially the systems which tend to jump into your face and might give a very spontanoius feeling in the beginning start to annoy me after half an hour, becoming intrusive, ...nervous..
And NO I am not mostly listening to classic music. I usually listen to Rock/Pop radio. Also often Metallica, Apocalyptica, AC/DC, Gary Moore, Guns 'n Roses, Papa Roach, The Offspring, Nirvana, Red Hot Chili Peppers, Nightwish, Rammstein, Kiss, Helloween, The Rasmus, Foreigner... means I definitely do like a big variety of the more powerful stuff. Only once and a while classic.

Back to topic:
How does the Peerless appear from subjective impression? More decent or is it one of the more agressive ear intrusers?
Or if we want to try it with a more technical approach, what would be typical characteristics of any 28mm Esotec in comparable measurements?

V-bro:
I do not really want to buy a speaker, where I already know from beginning that I have to modify... I mean I would pay for the ferrofluid, have work with removing it and (if things are running wrong) might end up in a mistuned speaker...

[Inductor]

Hi, ChocoHolic
You can buy a kit with x-over and tweeter (Vifa dx-25) from Wayne Parham @ Pi Speakers. Wayne is an excellent acoustics Master a great friend and very helpfull too.

[ChocoHolic]

Hi Inductor,
I had a look to Pi WebPage and found that a Kit contains all drivers + x-over. But I am just looking for a tweeter.
This speaker project is just resulting from the fact that I am putting out of duty this subwoofer
Tiny 12 litre subwoofer making 15Hz and 600ccm?
and am now using two Sadhara cubes
JUST 142Vpp for +/-20mm excursion !

Means I suddenly do have 12 pieces (11+1backuppiece) of 15W75 Esotecs on hand... and I think that I could make nice small satelites with that... giving me any freedom for using in stereo, quadro, home theatre.... I am still not sure if I should go for 12 mini satelites or may be 6 systems with d'Appolito arrangement.....

But your posting pushed me to have a closer look to the Vifa DX-25. Hey man this seems to be a nice budget tweeter. On the other hand I am not sure how (if possible at all) to transform the measurement data into my personal audiophile perception... An uncertain feeling is causing me to guess that my ears would like the Peerless 810921 more, but it is just a feeling...

May be I have to play around with different tweeters before buying all 12....

[sreten]

Originally posted by ChocoHolic


..... And it seems to be without ferrofluid, nice. .....

Hi, the impedance profile does not agree with you, /sreten.

[Timn8ter]

Not sure if it's in your price range but the Hiquphon tweeters are very nice.

Hiquphon OW1

[ChocoHolic]

Originally posted by sreten



Hi, the impedance profile does not agree with you, /sreten.

Hi Sreten,
you mean the low Q resonance of the impedance is indicating a high mechanical damping, which is caused by ferrofluid?
Hm... have to dig deeper...

[Tenson]

Originally posted by Timn8ter
Not sure if it's in your price range but the Hiquphon tweeters are very nice.

Hiquphon OW1

Second that.