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Old 25th July 2009, 10:32 PM   #1
Telstar is offline Telstar  Italy
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Default Ribbon midrange - what do we have here

I'm considering a BROAD range of options.

What's on the market? I'm speaking of really big (true) ribbons capable of going as low as 300hz.
Impossible feat? diy only?

Let's share opinions.

PS: efficiency has to be very high (95+dB), otherwise a planar panel would have been an option.
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Old 26th July 2009, 12:24 AM   #2
tinitus is offline tinitus  Europe
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I would have linked to Rubanoide

But no site found now
Either its gone for good, or its temporarily
But I have my suspision about why

At least we are some members who knows the secret of Rubanoide
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Old 26th July 2009, 08:43 AM   #3
PW is offline PW  Germany
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Default Rubanoid

http://fdacoustic.fr/
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Old 26th July 2009, 02:12 PM   #4
Telstar is offline Telstar  Italy
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Default Re: Rubanoid

Quote:
Originally posted by PW
http://fdacoustic.fr/
TYVM. Looks perfect for my needs. Only matter is cost.
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Old 27th July 2009, 03:43 PM   #5
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B&G radia series. The RD75 is good for 150 Hz.

http://www.parts-express.com/pe/show...number=264-700
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Old 27th July 2009, 03:54 PM   #6
Telstar is offline Telstar  Italy
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Quote:
Originally posted by StigErik
B&G radia series. The RD75 is good for 150 Hz.

http://www.parts-express.com/pe/show...number=264-700
sensitivity 88 dB.

BTW, Erik keep us updated with your dipoles with mundorf or beyma AMT.
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Old 28th July 2009, 05:28 PM   #7
el`Ol is offline el`Ol  Germany
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I really like big ribbons. The Dali and Analysis speakers I heard had the most realistic transients of all speakers I know. As far as I know the Analysis Amphytrion has a crossover point of 800 Hz. Must have some reason that they dont go lower.
I dont add Magneplanar to that list. Are their tweeter elements magnetostats or ribbons?
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Old 28th July 2009, 05:54 PM   #8
Telstar is offline Telstar  Italy
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Quote:
Originally posted by el`Ol
I really like big ribbons.
I was expecting you to find this thread

Quote:
The Dali and Analysis speakers I heard had the most realistic transients of all speakers I know.
Ditto. That's the biggest advantage. I think is related to this the correctness of harmonics that create the timbre.
I didnt know this particular Dali model. I have Dali dealers in my area, will try to audition one

Quote:
As far as I know the Analysis Amphytrion has a crossover point of 800 Hz. Must have some reason that they dont go lower.
Dynamics, I guess.
They do with planar the lower part so the losses/benefits is different. I doubt they are efficient. Think of what kind of speed and ultra-low distortion can achieve a 100dB ribbon
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Old 28th July 2009, 06:56 PM   #9
el`Ol is offline el`Ol  Germany
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Quote:
Originally posted by Telstar

I didnt know this particular Dali model. I have Dali dealers in my area, will try to audition one

The model I heard was the Dali Scyline which is no longer in production. The last big ribbon left in their product range is the Megaline, a manufactured on demand thing, you need to be lucky to find a dealer who has it standing around.
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Old 29th July 2009, 07:33 AM   #10
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Hi guys,

this is diyaudio site, so please try not to mix everything up like the avguide folks, who can`t differentiate between cones and domes
Bohlender Graebner Radia RD 75 is a planar magnetic unit (magnetostat), Analysis Amphytrion has a planar magnetic bass and a laminated ribbon for the mid/high range (all their models have a 650 Hz XO) and Rubanoide is...well see below, some kind of bending wave transducer (I heard the 20cm tall unit many years ago, sounded promising, better than any dome/cone combo and I also played with a smaller Radio Shack unit for a while):

http://www.soundimage.dk/Different-col/Bending.htm

http://membrane.com/impact/products/prodairfoil.html

http://membrane.com/impact/products/...rfoilpaper.pdf

http://www.6moons.com/industryfeatures/aero/aero.html

Click the image to open in full size.

The Apogees of old had some 50 mm wide true ribbons, pure alu or aminated and TA still makes similar ones:

http://www.apogeespeakers.com/ribbonsmenu.htm

Click the image to open in full size.

http://www.transmissionaudio.com/

Click the image to open in full size.

All of the above could be made diy - good luck!



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