HELP! Oh my god, these esoeric tweeter questions

[leifislive]

Hi,

and, yes I am quite torn in between and like to seek help.

I am using the Dynaudio D-76AF mid dome and the Peerless WA10 tweeter presently.

It's not a bad combination, but it is not perfect in the higher treble; there are some peaks in the >10k region.

Somehow a Dynaudio Esotar found its way to me....
It is a well respected driver; but it has a gigantic faceplate. Keeping drivers close is therefore a problem, as long as I am not going to saw off some part of the D-76 and the Esotar faceplate. But that will affect resale value, in case the combination is not up to what I expect...

Unfortunately, the Esotar is not the newest design; so whether it is presently really an "ultimate" driver... I do not have that much experience with different drivers to really make a statement. I was attracted by the Esotar in order to build a complete Dynaudio speaker; mainly out of curiosity

But then, I got the impression, that a dome with a smaller faceplate like the Morel ST728 or Scanspeak D3004 series may help me in practical terms more. However, independent data on these is presently unavailable. And a complete test of those will require a lot of money to be spent.

Has anyone ever used such small, neodym drivers successfully? Do you have any other suggestion on that matter? Who would say: saw whatever you want from the Dynaudios and you will never look back again in terms of "neutral sound"?

I appreciate you comments!

Regards,
Leif

[LineArray]

Unfortunately you do not tell us the desired XO
frequency for the tweeter.

If You want to experiment with the esotar, wy not
make an experimental faceplate which is smaller ?

If the Dynaudio tweeter can be disassembled without
destroying, you can save the original faceplate for
later use.

Otherwise you can mount the tweeter with some everlap
to the Mid-Bass front bezel to get closer.

Is it important for You that the type of tweeter is recognized
visually? Or are you looking for a good sounding solution ?

If proximity is crucial, then a neodymium tweeter is interesting.

This one is rather cheap and performs very well above
2 ..2.5 Khz:

http://www.schlotzhauer-versand.de/p...461a3359fe299f


Number One DT 25 N has been tested very well in "Hobby Hifi".

Cheers

[leifislive]

Hi,

thanks for the response. I am just looking or a clean, neutral sounding solution

The esotar can be dissassemble; I have tried that. I could either design a "better" Faceplate, or I would need to copy the existing faceplate... That is true.

However, I cannot do that for the D76AF easily, at least as far as I dared to do unteil now.

X-over should be around 2250Hz.

[LineArray]

2.3 Khz with >12 dB rolloff should be no problem with
DT 25 N, with a ferrite type magnet it is impossible
to get as close.

But there are so many tweeters ...

[bzfcocon]

There's also the bigger brother DT 28 N, which I am using right now as a rear tweeter: good sounding and really small - as said, cannot beat this with a ferrite tweeter.

It does seem however, that small Neo tweeters have generally higher Fs (or at east I have not seen any that go down as low as a large ferrite tweeter). But that is only an issue if you want to go REALLY low.

[leifislive]

I don't have to go low. 2250 is fine with the D76 and 20€ fo the number one... well, that is not too much money for a try....

I am crossing over actively, presently with the DCX, so phase adjustment is no problem either.

Is the D25 fine off-axis and shows a smooth roll-off? Does it show in the HH test as linear as the manufacturers chart suggests?

Thanks,
Leif

[LineArray]

Originally posted by leifislive
I don't have to go low. 2250 is fine with the D76 and 20€ fo the number one... well, that is not too much money for a try....

I am crossing over actively, presently with the DCX, so phase adjustment is no problem either.

Is the D25 fine off-axis and shows a smooth roll-off? Does it show in the HH test as linear as the manufacturers chart suggests?

Thanks,
Leif

The DT 25 N is 5dB down at 30 degrees off axis at 15 Khz.

On axis curve and off axis do not differ too much in shape
and are very smooth. Of cause there is noticeable
beaming towards high frequencies, it is unavoidable
when using a 25mm dome.

It has an outstanding step response and waterfall spectrum.
Rolloff is smooth at both ends ...

Cheers

[D OB G]

Hi leifislive,

I'm using the Dynaudio Esotar 330td model.
I've cut the faceplate as close to the magnet on one edge as possible, but of course the magnet is huge!
As far as keeping the tweeter as few wavelengths away from the mid as possible, have you considered a lower xover with a steeper slope?
You have DCX.
I'm using a DEQX HDP3, and with the linear phase xovers it is possible to cross at, say, 60dB per octave.
I've been using 1200Hz for a while (the Esotar has the xmax), but just lately I've been running it from 1000Hz.
The system sounds even better.
(Due to the interest on this forum thanks to Dr. Geddes, I'm about to mount it on a waveguide).

David