I posted this in two relevant threads where B80 is used so people can see. It happens to be that both threads are started by you so i hope you don't mind.
Zvu, from the data sheets, they appear to be very similar, but not identical. The Visaton is the (slightly) better one. Qms of the Visaton is a bit higher, Le a bit lower, and the Omnes has a 5dB step in the FR from 1-2 kHz.
That's why i wrote - decide for yourself - meaning that it should be verified. They are so similar that i wouldn't expect too much deviations in side by side measurements of frequency response. As for TS, i measured six SB17NRXC35-8 that had larger deviations than these two.
This is a hint - interested ones may or may not check it, that's all 🙂
This is a hint - interested ones may or may not check it, that's all 🙂
No, but thanks for reviving this thread from nearly 5 years ago. I forgot all about the FUR - no one offered to send me one.
I figure if mr linkwitz was happy with it it’s worth a try. Might take some measurements and post in the forum in next while
Timothy Feleppa tested it a few years back:
FR: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_RelHarm.png
For convenience, these are his equivalent measures of the (8ohm) TC9 many favour:
FR: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_RelHarm.png
And for completeness, the TG9 (also in 8ohm flavour):
FR: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_RelHarm.png
FR: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/FU10_RelHarm.png
For convenience, these are his equivalent measures of the (8ohm) TC9 many favour:
FR: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/TC9_RelHarm.png
And for completeness, the TG9 (also in 8ohm flavour):
FR: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_FreqResp.png
HD: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_RawHarm.png
HD with fundamental normalised flat: http://feleppa.com.au/pics/speaker_imgs/plots/TG9_RelHarm.png
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Scottmoose,
Thanks for that collection of useful links. There is a strange 1.7kHz distortion peak on the SEAS. Otherwise all 3 drivers measure very similarly.
Thanks for that collection of useful links. There is a strange 1.7kHz distortion peak on the SEAS. Otherwise all 3 drivers measure very similarly.
Pleasure.
The spike in HD2 around 1.6KHz (roughly) is probably the result of a cone edge-resonance; you can see the remnants of it in TFs measurements -ironically it's a bit more obvious in Seas's own graphs. Note the fluctuation too in the impedance graph Seas publish at the same frequency -a classic sign of energy storage (aka some form of resonant issue). These are almost always associated with a rise in HD2 at that point. SB's 5in Satori units and to a slightly lesser extent, their 6in papyrus cone Satori are good examples (not knocking the MW16P -I've used it myself a number of times & it's still an excellent unit). Incidentally, you can see the same in HD4. See the spike at about the same frequency? Almost certainly a product of the minor breakup mode at about 6KHz, give or take.
The spike in HD2 around 1.6KHz (roughly) is probably the result of a cone edge-resonance; you can see the remnants of it in TFs measurements -ironically it's a bit more obvious in Seas's own graphs. Note the fluctuation too in the impedance graph Seas publish at the same frequency -a classic sign of energy storage (aka some form of resonant issue). These are almost always associated with a rise in HD2 at that point. SB's 5in Satori units and to a slightly lesser extent, their 6in papyrus cone Satori are good examples (not knocking the MW16P -I've used it myself a number of times & it's still an excellent unit). Incidentally, you can see the same in HD4. See the spike at about the same frequency? Almost certainly a product of the minor breakup mode at about 6KHz, give or take.
It’s a shame the TG9FD-8ohm is discontinued. It’s one of my favorite drivers for sound and looks interesting/different with a white fiberglass cone.
I will have to give the Seas FU10R a try one fo these days.
I will have to give the Seas FU10R a try one fo these days.
Nice measurements. Looks as if the Seas unit has better far better off axis measurements over 10Khz compared to the TC9. Look forward to trying it. Cheers
