The pallet is ready to ship! Erich is calling the shipping co. to pick up next week. S.E.O.S.R. MEGA BUILD
My friend who is carpenter has started project using self made TH-4001 waveguide/horn hybrid, Radian 950 and Beyma 15B100R-GH.
Hello Jack,
While the TH4001 horn possess many qualities, it is an old design based on a Smith horn at the mouth of which is adapted a curved mouth ( which is a short horn belonging to the hyperbolic family).
I don't find it so good sounding and i am not alone. (I am probably too much sensible to the audible effects of diffraction, inner reflections, etc)
The impulse responses of the TH4001 (which one equips TAD monitors like the TAD2402) as you can see here in the 2 links:
(look at the green curve)
http://2.bp.blogspot.com/-HttNapLF7gA/TbjIKSwG56I/AAAAAAAACZA/Fi1_W0NDCnE/s1600/diffraction+horn.png
or also at :
http://4.bp.blogspot.com/-3wCe1MaSJ...9%E5%85%A8%E9%A0%BB%E7%B7%9A%E6%80%A711ms.png
both show a delayed pulse of quite large intensity arriving 0.4ms after the first arrival.
That's probably the origin of the lack of quality myself and others can hear with the TH4001.
Best regards from Paris, France
Jean-Michel Le Cléac'h
Autotech has scanned Eminence 12cx membrane and I will use this data for mods.
Mods of what?
This is not a problem if Autotech can buy gelcoat in small packages (1kg) - will ask how it looks now. Below I present LCY-110 ribbon just attached to SEOS-12. Blue is RAW driver. At about 500Hz it rings so must be filtered.
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