Mark K's Speaker Pages
...when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely in your thoughts advanced to the state of Science...Lord Kelvin
Tweeter Group 6- Dayton RS28F, SB Acoustics 29RDC, Tang Band 25 1372SC titanium
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Tweeter group 6
FR and impedance first, followed by the nonlinear tests.
Off axis families
Impedance measurements
Below, a comparison between the two RS28F units./p>
Nonlinear distortion
TThe order is RS28F followed by the SB and the TB, at 1k, 1.3k, 1.5k, 2k, 5k
At 1.3k/p>
At 1.5k
AAt 2k
At 5k
&n
Summary
The RS28F is clean to 1k on my tests. The SB29 can't quite match this, but is clean from 1.3k and up. The TB is in the second group, so to speak. And, I think you could argue that the SB is cleaner overall from 1.3k up, though I doubt this would be statistically correct. The SB29 is more directive, whether you prefer this or not, that's up to you to decide. The SB29 is the most sensitive of the group.
NOTE remember to add 9dB to get the 2.83v sensitivity. Praxis references everything to 1v. It can be processed, but manually for each graph. It's less work for me if you just do it in your head. But definitely, don't email me asking me if these tweeters are "really only 82dB sensitive!
The SB and RS are both outstanding tweeters.