Yes, indeed! I don't like this. But camplo even published screenshots of private mails with John@AE. Maybe we should tell him again that this could be a serious issue.
It is generally a normal thing that conversations end somewhere because someone thinks everything is said. There is a life (job, family, etc.) beyond our hobby for most of us and spare time is very often limited.
There is also no requirement that everyone always has to share everything.
The SEOS project has an interesting history:
https://www.diyaudio.com/forums/mul...rs-sound-home-fi-vortex-15-a.html#post6027243
The way many people have attacked the SEOS project speaks volumes to me.
I tried to go to the original thread, But I get this message - "No Thread specified. If you followed a valid link, please notify the administrator".
Have you used your printed horn and a SEOS12 in a system, or only your horn on a test jig? Any measurements to show? How much does your printer equipment cost to make a low cost horn? Time is also a cost. Did the split in the horn affect your measurements?
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Finally some un-normalized FR................................................................................................................................................................................................................................................................................................................................
Ty Mazza for being that type of guy to share your measurements....even though its not required of you
, you are one of the good ones aye, The time you took away from your Job and family to take and share these measurements, is much appreciated by all....or at least me. I love me some measurements lol. I told my wife this guy was sending me his measurements....she said "hes sending what!?"
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Please don't get me wrong, I believe the SEOS was state of the art and is still probably one of the best WG's ever available on a commercial basis.
ATH4 has simply moved that state along somewhat.
I have a SEOS 12 in my bedroom system and (confirmation bias aside) think its the best sounding system I've personally heard.
I've not had the printed ST260/B in a system. But its clearly very very good. Measurements were just posted now. A friend at work printed this, I pay for the spool of print material. The spool cost $20 AUD, we've printed two complete horns and still have plenty left. Most probably the split does create problems if measured along that axis but I wouldn't use it like that (with a split) in a system.
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Thanks for your suggestion. I examined the additional resonance with the aluminum dome and considered it acceptable, in it's range.
I did read an article about modifying a rear cup with foam. I have a link or copy of it.
If I get to this point, I will probably upgrade to a Be diaphragm first. And, for LCR only. I will do that before considering modification, or a custom waveguide.
I figure that Radian knows more about their compression drivers than I do. If Radian did this modification, or sanctioned it, it would be a plus.
Perhaps Radian will introduce a carbon fiber option for the dome. That would interest me too.
I will keep this idea, and a few others, in mind for future reference.
Please don't get me wrong either. I'm not suggesting you are part of the attacks. After following the SEOS project for a few years, I decided the arguments surrounding the project were far more political then technical. The SEOS project was such a beautifully collaborative project. It ruffled a lot of feathers. Feathers with ego and money interests. Some wanted to kill it. Some wanted to take advantage of it. That's my take anyway.
I didn't buy any of the waveguides when they were readily available. Should have. They were relatively inexpensive too. Was far too busy with a public service responsibility, and horns/waveguides was learning a new language to me. I'm playing catch up. My brain is stretching in older age, and I like it.
Thanks for the measurements. Thanks for sharing your bedroom system project. I've seen it before and stored the link for future reading. I saved the ATH4 thread too. So much reading, so little time...
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Many thanks.
What would be your target x-over point with this combo and what steepness? Passive xo or DSP?
How much level is coming from the woofer compared to this?
Breakup resonances of 4" metal diaphragms are really hard to surpress/dampen.
Sony did an excellent job with SUP-T11 > video.
Beryllium is the obvious alternative, but apart from the price and poisonous nature, I think it's 'too good' in terms of speed of sound through the material.
Because of this, the mids/highs tend to sound hyper-realistic and separate from the paper cones below, which can get tiresome in the long run.
Carbon fiber was first used in the RCF N980 > video.
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TAD TH-4001 horn clones, TAD TH-4003 horn clones | eBay
Tad clones for 1500usd.
Thinking about Seos, The largest of them...
Holds directivity lower than it can be used...so the added directivity within the ranges it can be used must be the prize.
Tad clones for 1500usd.
Thinking about Seos, The largest of them...
Holds directivity lower than it can be used...so the added directivity within the ranges it can be used must be the prize.
Attachments
... and its not your source or amps... this is what is so har... maybe we have all dismissed units that are superior to what we have had just because once we gete a really good driver/speaker, we cant stand whats been put into them... sad really.
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The price of Beryllium is pretty crazy. Is the poisonous nature of it a real concern? No one is turning the dome into powder and inhaling it.
I remember listening to a system with a tweeter that was hyper-realistic compare to the rest of the range. It was a plasma tweeter. Helium feed. It produced ozone. It wasn't very healthy. I forgot the name of the company.
Carbon fiber may be a good alternative.
I like that. Does it come in black, 1.4" entrance, not too expensive? Data?
Is that really a 200HZ, 31cm horn? 12.2"? Seems kind of small.
Edit - Is that 31cm front to back depth?
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Yes, probably.
I think the vintage Altec / EU Triode clan know what I'm referring to.
It's like everyday life through less than stellar eyes, or Kubrick's Technirama Delrama Anamorphic with Panavision lenses vs watching the Hobbit in 4K...
That said, I could probably live with a pair of TAD TD-4003s, provided there's a proper midbass FLH underneath.
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The cutoff is 200 Hz. However, it's not a hypex profile, but a modified spherical, so that horn can be used from about 400-450 Hz.
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