A Subjective Blind Comparison of 2in to 4in drivers - Round 4

[Zvu]

That's a good deal then if the same thing. The B80's are sourced from China. Would not surprise me if OEM manufacturer keeps a batch for himself with "gold" phase plugs and sells them on his own.

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.

 

[vacuphile]

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.

 

[Zvu]

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

 

[frangus]

BUMP

Never had a chance to use an FU10RB - but will gladly test it and add to next round if someone provides me one.

Nice looking driver, reminiscent of a ferrite motor 10F, if such a driver where available, or should I say, an alloy framed TG9FD?

Good specs too: Seas Prestige FU10RB H1600-04 4" Full Range

Just wondering, was the test on the fu10rb completed

 

[xrk971]

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.

 

[frangus]

No worries. And hey don’t thank me, it wasn’t that hard

 

[frangus]

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

 

[Scottmoose]

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

 

[xrk971]

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.

 

[Scottmoose]

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.

 

[xrk971]

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.

 

[frangus]

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

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

 

[norman bates]

But the seas has a rising high end and is expensive.........

 

[frangus]

True, but it will work a bit better with the DSP build I am planning. Cheers