The measurements of the Scan-Speak D3004/606200 Textreme dome tweeter:
https://hificompass.com/en/speakers/measurements/scan-speak/scan-speak-d3004/606200
https://hificompass.com/en/speakers/measurements/scan-speak/scan-speak-d3004/606200
Strange how different your spl response is compared to Dickason... perhaps Dickason didn't mount them flush to the baffle?
https://audioxpress.com/article/test-bench-scan-speak-d3004-606200-tweeter-from-its-illuminator-line
https://audioxpress.com/article/test-bench-scan-speak-d3004-606200-tweeter-from-its-illuminator-line
They say "After completing the impedance measurements, I recess mounted the Scan-Speak D3004 TPCD diaphragm tweeter in a bookshelf-size enclosure that had a baffle area of about 11”x6” and measured the horizontal on- and off-axis at 2.0V/0.5m...."
So, it looks like we are seeing diffraction/interference effects from the front panel
So, it looks like we are seeing diffraction/interference effects from the front panel
Dickasons measurements are often ... inconsistent. This 2,8kHz dip doesn't come from the tweeter for sure, I would not publish such data, not even in a forum.
The tweeter itself ... I'm spoiled from Bliesma off axis performance. THD is also not famous, H2 is high and H3 rises under 2kHz a lot, so you can't use a low crossover frequency (Bliesma has lower THD at 1,5kHz AND through the complete range).
Happy to have enough T25B for my personal use here ... still the best tweeter out there.
The tweeter itself ... I'm spoiled from Bliesma off axis performance. THD is also not famous, H2 is high and H3 rises under 2kHz a lot, so you can't use a low crossover frequency (Bliesma has lower THD at 1,5kHz AND through the complete range).
Happy to have enough T25B for my personal use here ... still the best tweeter out there.
No-one takes as much care to measure raw drivers as carefully as you, Yevgeniy, my friend.
Best wishes from Australia.
Best wishes from Australia.
Yes, I agree.o-one takes as much care to measure raw drivers as carefully as you, Yevgeniy, my friend.
And of course "infinite" baffle as Purify does (one reflecting wall in a measurement chamber or a flush plate in the floor).
The dip is present on HIFI Compass and the manufactures data. Voice coil is more prevalent.Dickasons measurements are often ... inconsistent. This 2,8kHz dip doesn't come from the tweeter for sure, I would not publish such data, not even in a forum.
The tweeter itself ... I'm spoiled from Bliesma off axis performance. THD is also not famous, H2 is high and H3 rises under 2kHz a lot, so you can't use a low crossover frequency (Bliesma has lower THD at 1,5kHz AND through the complete range).
Happy to have enough T25B for my personal use here ... still the best tweeter out there.
Thanks for the review. As a 2 way I agree with your assessment that you would like deeper bass.
I would use this as a 2-way coaxial in small cabinets + augmented by separate subwoofers, LR4 XO at 80 to 150 Hz, depending on room acoustics....
I would use this as a 2-way coaxial in small cabinets + augmented by separate subwoofers, LR4 XO at 80 to 150 Hz, depending on room acoustics....
Or MT in 3way. I could imagine 8inch woofer, or even larger.
Maybe a nice driver for a central channel in a sealed enclosure ?
For a good price point, i would advice you to take a hard look at the Sica coaxes linked below, they perform extremely well for the $ required.Interesting, this SB coaxial looks pretty good, better than I expected. I wonder how it compares to Seas MR18REX for usage in a 3-way crossed at ~200hz, I think they are priced similarly.
https://sica.it/coaxial-line-for-hi-fi-and-studio-monitor/
https://www.dibirama.it/home-page/coassiali/691-sica-5-5c1-5cp-8-coassiale-5-5-1-8-ohm-240-wmax.html
https://www.dibirama.it/home-page/coassiali/654-sica-6-5c1-5cp-8-coassiale-6-5-1-8-ohm-240-wmax.html
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