Project Madness

@noamgeller I think we are on line here ..... looking at the Codex and Midex, I kind of think it is like a DIY style with some glass on top of it... and probably if the Medeos is the same .... heck, maybe I had too high hopes for Medeos 🤔

Maybe a great DIY project will leave Medeos in the dust, my idea would be a similar topology but with a very narrow baffle, not wider than what is needed to fit the drivers....

There is a lot going on now, there is a few months of getting things optimized, acoustics, and having fun, I think I won´t get started until next year, I think there will have to be lots of simulations here.... so lots of groundwork first, at the moment my setup is not worse than anything I heard from Audio Physic, and when I get acoustics right, this is gonna be fun 😎
 
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Anyone had any experience with the Seas Excel coax drivers?
Generally, looking at the measurements, the tweeter response looks very "rough", but thinking about Seas reputation of quality
Still .... it´s not a Kef 🤣

http://www.seas.no/index.php?option...atid=60:seas-excel-coaxial-drivers&Itemid=361

F_Seas_Excel_loudspeaker_coaxial_E0060-08_06_C18EN002_A.jpeg


seas_excel_loudspeaker_coaxial_6.5_inch_E0057_C18EN001M_1.jpg
 
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Generally, looking at the measurements, the tweeter response looks very "rough", but thinking about Seas reputation of quality
Still .... it´s not a Kef 🤣
The manufacturers graph is very hard to read with all the tweeter and woofer curves overlaid.

Erin has measured this one and posted a review, the tweeter response is about as good as you could hope for in a coax and is anything but atrocious. The on axis has some wiggles as they all will, as that is where the interference is greatest. As soon as you move off axis that has disappeared.


Seas.png
 
the tweeter response looks very "rough"
I was looking at the woofer and thinking how I'd want to cross it low. Then it occurred to me the higher sensitivity of the tweeter could be used to advantage in that respect. The baffle step would help there too.. so maybe all is not what it seems.

I do have other reservations, it's not a perfect tweeter environment.. however I'd find it interesting having a go at making it work.
 
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The manufacturers graph is very hard to read with all the tweeter and woofer curves overlaid.

Erin has measured this one and posted a review, the tweeter response is about as good as you could hope for in a coax and is anything but atrocious. The on axis has some wiggles as they all will, as that is where the interference is greatest. As soon as you move off axis that has disappeared.



View attachment 1063648
And that's the point of KEF - they are more or less the only coax drivers completely lack of these on axis wiggle (Genelec ONEs does it also) and in addition have very broad HF dispersion. They had a few variants of their "lemon squeezer" over the years but they finally figured it out - big respect for that!
If you listen in a living room with a few meters distance ... it's not a big issue. But at closer distance in a controlled room you hear it.
 
Audio Physic Medeos, diffractions tell them nothing. Even visually, the square cabinet is ugly.
Take the example of the Technics SB M10000 from 1995.
https://ldsound.info/technics-sb-m10000/technics-sb-m10000-ldsound-ru-3/

T25B
M74B
PTT6,5W 2ks
SS W26 4ks (2ks back side)

View attachment 1061243
THAT's how to build a fullrange speaker in 2022! 😎
(The SB Acoustics 12" NRXL woofer is EXTREMLY good and cheaper as the ScanSpeak. And of course we build a double bass array if possible ... 😉)