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Old 3rd June 2012, 06:07 PM   #1141
Tytte71 is offline Tytte71  Norway
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Stupid me painted some Aquaplas on the 475 just to see if that could improve its performance... It did in the distortion test, but the top end collapses. In addition it slightly worsens the time domain performance above 8kHz. Ok that was 100 USD out the window
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Old 3rd June 2012, 09:53 PM   #1142
jzagaja is offline jzagaja  Poland
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Looks like your Aquaplas coated driver is far away from main league ;-) DE500 seems cleanest of drivers that can be crossed below 1kHz. Bottom end also looks weird.
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File Type: jpg Aquaplas.jpg (66.1 KB, 591 views)
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Old 3rd June 2012, 10:53 PM   #1143
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Quote:
Originally Posted by jzagaja View Post
Looks like your Aquaplas coated driver is far away from main league ;-) DE500 seems cleanest of drivers that can be crossed below 1kHz. Bottom end also looks weird.
The BMS can't be crossed that low? Or is there something I'm misreading from the graph?
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Old 3rd June 2012, 10:56 PM   #1144
Tytte71 is offline Tytte71  Norway
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Before concluding I believe I will have to adjust my setup and software to make it as similar to yours as possible. This does not look right. Regarding the Aquaplas, I don't think that added much positive to it
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Old 3rd June 2012, 11:12 PM   #1145
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Originally Posted by Tytte71 View Post

Before concluding I believe I will have to adjust my setup and software to make it as similar to yours as possible. This does not look right. Regarding the Aquaplas, I don't think that added much positive to it
That just means you need about five more layers of the stuff
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Old 4th June 2012, 08:07 AM   #1146
Tytte71 is offline Tytte71  Norway
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Originally Posted by RockLeeEV View Post
That just means you need about five more layers of the stuff
Sometimes it's hard to tell if people are joking or not do you really mean I should load the diaphragm with a pound of that stuff
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Old 4th June 2012, 01:27 PM   #1147
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Hi Jzagaja!
Will the plastic SEOS 12 be available in Europe through horns.pl or otherwise? It seems like a bad idea to send it twice over the atlantic ocean, and pay EU-tax. I would be very interested in buying a few.
Thorsten
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Old 4th June 2012, 03:09 PM   #1148
jzagaja is offline jzagaja  Poland
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Plastic SEOS-12 is a product of Diysoundgroup designed in USA - no relation with Autotech. We can import from there like everyone, large quantity to minimize custom duties, taxes etc. so we prefer supply locally our cast (poured, solid surface) version ca. 50% of fiberglass price.
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Last edited by jzagaja; 4th June 2012 at 03:13 PM.
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Old 6th June 2012, 03:00 PM   #1149
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Originally Posted by jzagaja View Post
SEOS 24 is ready with throat angle 14deg, waiting for TAD 4001, Radian 950/951 and 18sound ND4015BE, NSD1480N, ND2060A angles.
What's the low frequency cutoff for this 24" version of SEOS? I think I might like to do a build with a 1.4"-1.5" exit CD using those Truextant Be diaphragms and dual AE TD15-S woofers running sealed in parallel for a 4 ohm load and increased efficiency up underneath it... I did some measurements and they'd fit perfect in one of my rooms if I keep them to about 33 inches wide or so... I really like the look of the TAD monitor design linked above... I think it would look good in my room I want to get the crossover down fairly low though so the side by side woofers won't be an issue...

you say it is for the Radian 950 CD but say it is a 1.4-1.5" throat waveguide.... isn't the Radian 950 a 2" throat? How does that work as my noob brain is having difficulty? some sort of adapter??

I'll contact Erich to see what it will run to get a pair of them made and sent over here to the USA to play with... I've got a ton of the plastic 12 inch versions to use up in other designs... but the more I research this, the more I think the above design would be more to my liking for two channel music listening.....
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Old 7th June 2012, 11:24 AM   #1150
jzagaja is offline jzagaja  Poland
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Quote:
What's the low frequency cutoff for this 24" version of SEOS?
Simulation suggests 650Hz.

Quote:
isn't the Radian 950 a 2" throat?
True. Radian 951 is 1.4", differs in phase plug and is sold by Behringer Electric.
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File Type: gif SEOS-24.gif (13.3 KB, 520 views)
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