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Old 27th October 2012, 12:09 PM   #21
koldby is offline koldby  Denmark
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Hi

I made a black line source using cheap Madison drivers and an alu linesource using the same Vifa as IDS25 except paper cone instead of glassfiber.

Koldby
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Old 6th November 2012, 12:36 PM   #22
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and you like how it sounds?
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Old 6th November 2012, 01:54 PM   #23
haraldo is offline haraldo  Norway
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Quote:
Originally Posted by koldby View Post
Hi

I made a black line source using cheap Madison drivers and an alu linesource using the same Vifa as IDS25 except paper cone instead of glassfiber.

Koldby
Did you do any equalizing? how do they work for you? Is it closed box?

Dansk Dynamit
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Old 7th November 2012, 08:41 AM   #24
Pnotus is offline Pnotus  Sweden
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Originally Posted by flg View Post
Personally, I want to develope a dipole line.
I'm a dog. What do I know?
Ive been spending the last coupole of weeks listening to the TC9, TG9, Faital Fe22 and a Sica 3,5" fullrange to figure out what could do best in a open baffle line array. Both Vifas have their merits but at the moment I think the Faital have the best midrange clarity. No eq thou - just the amps signal untouched.
But - I want to add tweeters and some type of bass augmentation so this may not be relevant in this thread.

I have a dog - she knows exactly when something is good or bad. She leaves the room when I play pop music or when anything sounds to harsh.

/Pontus
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Old 7th November 2012, 10:12 AM   #25
haraldo is offline haraldo  Norway
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Did anyone look into some of the Fountek fullranges drivers fe85, fr88ex, fr89ex), seems like they do have a more "clean" extended upper range than the Vifa's

Fountek fe85

Fountek fr88ex

Fountek fr89ex

They look awfully like what Adyton employs in their new hi-end line of speakers
Click the image to open in full size.

Last edited by haraldo; 7th November 2012 at 10:34 AM.
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Old 7th November 2012, 11:52 AM   #26
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Judging by the cone, suspension & frame, FE85.
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Old 7th November 2012, 12:01 PM   #27
haraldo is offline haraldo  Norway
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Quote:
Originally Posted by Scottmoose View Post
Judging by the cone, suspension & frame, FE85.
FE85 is very cheap driver and seem to be an interesting choice for this type of speakers, although they must be mated to stereo pair of subs that must be crossed quite high.
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Old 7th November 2012, 12:16 PM   #28
Pnotus is offline Pnotus  Sweden
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Not taking anything away from the obvious quality of the Adyton stuff, but, c-c spacing is to big to get full nearfield line array effect through the entire register with these drivers. I wonder where they cross-over to the ribbon..
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Old 7th November 2012, 12:26 PM   #29
haraldo is offline haraldo  Norway
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Quote:
Originally Posted by Pnotus View Post
Not taking anything away from the obvious quality of the Adyton stuff, but, c-c spacing is to big to get full nearfield line array effect through the entire register with these drivers. I wonder where they cross-over to the ribbon..
The Adyton range is the highest selling hi-end speakers of all times around here now, I never really properly auditioned the ones with the metal cone drivers, but the ones utilizing Vifa drivers with fiberglass cones are absolutely incredible....

Of course I wonder about this that it's line source up to approx 15kHz and point source above, well on this case it seems to work very well, the idea behind the ribbon that extends to 100KHz is extremely wide bandwidth, and it's not only for the dogs....

About spacing of drivers, they don't appear to be any closer on the ids-25 than Adyton's....

Last edited by haraldo; 7th November 2012 at 12:43 PM.
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Old 7th November 2012, 01:04 PM   #30
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That's because they aren't.

Centre-to-centre spacing should be fine for nearfield. The separate sources don't sum above a certain point (which is why FR based line-sources require some form of Eq) but they're close enough to avoid any audible differences beyond a few feet out once you've boosted the top-end, or attenuated the bottom to match. What you will get with the central tweeter are more obviously dissimilar Fresnel & Frauanhofer zones, so there's likely to be more of an ideal listening distance than with a full array per se.
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