Scan-speak D6600 vs D6620

[Audiophile100%]

any body has compared these two tweeters ?
i must choice between them.

thank you

[JonMarsh]

Yes.

D6600 family of axis curves:



D6620 family of axis curves:



D6640 family of axis curves:


All measured on the same test baffle. The 6620 has more of a short horn/waveguide loading, which boosts the output both on and off axis above 15 kHz. I have decent high frequency hearing for an older guy, and find that coloration fatiguing and objectionable. However, SS probably had some significant size customer that wanted that characteristic and paid to have a special tweeter built that way.... (that's pure speculation on my part).


In order of personal preference, my choices:


D6640
D6600

There's no reason to consider the 6620, as it costs more than the 6600 and from my tests and listening experiences offers no benefit. Note that the 6600 and 6640 have essentially identical faceplate designs.

If you were to consider a different cloth dome tweeter over the 6600, I'd consider the 7100; I have a set but haven't had time to measure them. The factory curves look promising and the faceplate design looks OK, plus the rear chamber is supposed to be better, a design used on most of SS's most expensive tweeters.






And Troels Gravesons' test of the 7100:



By his own admission, his mic is not calibrated and is already down 5 dB or more at 30 kHz, so take these measurements with a grain of salt (my mic/preamp is an ACO Pacific calibrated condenser instrumentation mid, not an electret, and it is flat to beyond 40 kHz.)




YMMV, etc, etc. :W

[Audiophile100%]

thanks for your reply jonhmarsh,
finally a person who has tried them both, congratulations!
from the graphs of scanspeak, is the 6600 model to have a peak in the high frequencies, but perhaps their measures leave much to be desired, don't you?
as regards the harmonic distortion?, have also measured that?

[JonMarsh]

In principle the distortion behavior should follow the motor and rear chamber design, and this is the case considering the 6600 and 6620, which are very similar, with the classic high 2nd order HD and very low 3rd and higher HD. However, the 6640 appears to use the same motor and rear chamber and both Troel Graveson's and my own measurements confirm lower distortion, even above 5 kHz for the 6640. He doesn't show particularly low distortion for the 7100.

[Audiophile100%]

as the subject of the message my choice is between the D6600 and the D6620.

I saw the measurements of a known German magazine, the distortion of the third and fifth harmonics are much more lower for 6620
This is an important point on which to discuss

[5th element]

He doesn't show particularly low distortion for the 7100.

Zaph does though.



Which is arguably better than the 6600.

[speedle]

Isn't the faceplate of the 7100 the same as the 6600? They look very very much alike as far as I can tell from photos.

[Face]

Close, but no.

[Audiophile100%]

excuse me guys,
as the subject of the message my choice is between the D6600 and the D6620.

[Carl V]

heard similar speakers with both of those Tweeters
I went with 6600....as has been stated there are
others out there with "better' measurements. I am still
happy. I'd have to spend much more to get better results, imho.

[5th element]

If given the choice I'd go for the 7100. If I couldn't take that I'd go for the 6600.

[Audiophile100%]

heard similar speakers with both of those Tweeters
I went with 6600....

what are the tonal differences that you've encountered?

[5th element]

Tonal differences are pretty much determined entirely by how you tune the crossover and nothing else. What really sets these tweeters apart is the top two octaves with more focus on the top octave and small differences in off axis performance. These kind of differences tend to make the speaker sound as if there's more or less 'space' around sibilants, or how finely 'etched' they appear in the soundstage, rather than sounding specifically bright or forwards, if that makes sense? Subjective qualities are always a pain to try and communicate, but sometimes you don't have a choice but to try >.<

[Audiophile100%]

Yes.
If you were to consider a different cloth dome tweeter over the 6600, I'd consider the 7100; I have a set but haven't had time to measure them. The factory curves look promising and the faceplate design looks OK, plus the rear chamber is supposed to be better, a design used on most of SS's most expensive tweeters.

What do you mean by "over", the D7100 is better than D6600?