Ribbon Tweeter advice please

dynoPort · 11th May 2007, 10:05 AM

Many years ago Wilmslow Audio did a loudspeaker kit called ‘Electrostatic one‘, I think. The small electrostatic panels would arc at highish volume levels. Anyway, the mid/base unit was a Volt BM220DS which I’m considering the possibility of using this with a ribbon tweeter in a two-way design. I estimate the crossover frequency would need to be about 2500-3000kHz? Could anyone recommend a suitable ribbon drive unit, something like the ones from Pinsh! but not available as a DIY drive unit I expect. Any gems out there?

rick57 · 11th May 2007, 10:14 AM

Dear dyno,

This may not be universally agreed with, but may be useful:

www.zaphaudio.com/nondomes/

Cheers

sreten · 11th May 2007, 02:56 PM

https://secure.wilmslow-audio.co.uk/...283283dbf845f6

/sreten.

GOWA · 13th May 2007, 06:26 AM

http://www.lcy.com.hk/diyhp/25114/enus/prodlib.html

dynoPort · 13th May 2007, 08:25 AM

I'm considetring the visaton magnetostat, not a true ribbon but a good tweeter I think. the Precide Heil amt is interseting but probably not available for diy.

any thoughts on crossovers!

Taco · 13th May 2007, 09:52 AM

Visaton is a good choice. If you want to use AMT, you can consider the Eton ER4 or the Mundorf AMT tweeters (both are very expensive).

dynoPort · 18th May 2007, 06:59 PM

How would you compensate for different sensitivity in your tweeter/mid-base units, in the crossover I mean. I have an old version of this:

http://www.voltloudspeakers.co.uk/Lo...y_bm220_8.html

which I already have a reflex cabinet for and would have the tweeter atop of it in its own little housing. At the moment I’m thinking of partnering it with a Visaton MHT 12 which apparently needs a 12db, 2nd order crossover (at 3000khz). Any thoughts you experts…!

dynoPort · 18th May 2007, 07:06 PM

Is it as easy a this?!

http://www.bmm-electronics.com/Produ...roduct_ID=1940

dynoPort · 20th May 2007, 09:35 AM

UPDATE… if anyone’s still interested…I've been doing research

Still in the thinking about it stage… a 2nd order crossover; I have some capacitors, and resistors for sensitivity balancing (called a L something), will get some inductors calculated to nearest: .68mh somewhere to start from.

As for phase, if the tweeter is set back from the mid/woof @ 3000hz crossover would that do instead of reversing the polarity of the tweeter? And by how much? Is there a calculation or by trial & error?

richie00boy · 21st May 2007, 02:26 PM

Quote:

Originally posted by dynoPort
Is it as easy a this?!

http://www.bmm-electronics.com/Produ...roduct_ID=1940

No that product is almost useless as it assumes ideal electrical and acoustical response.

11th May 2007, 10:05 AM	#1
dynoPort diyAudio Member Join Date: Oct 2004 Location: Cymru/Wales	Ribbon Tweeter advice please Many years ago Wilmslow Audio did a loudspeaker kit called ‘Electrostatic one‘, I think. The small electrostatic panels would arc at highish volume levels. Anyway, the mid/base unit was a Volt BM220DS which I’m considering the possibility of using this with a ribbon tweeter in a two-way design. I estimate the crossover frequency would need to be about 2500-3000kHz? Could anyone recommend a suitable ribbon drive unit, something like the ones from Pinsh! but not available as a DIY drive unit I expect. Any gems out there? __________________ WANTED: Creek Destiny POWER amplifier

13th May 2007, 06:26 AM	#4
GOWA diyAudio Member Join Date: Jan 2007 Location: Ontario	HAVE A LOOK AT THESE http://www.lcy.com.hk/diyhp/25114/enus/prodlib.html __________________ Website

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11th May 2007, 10:14 AM	#2
rick57 diyAudio Member Join Date: Dec 2002 Location: dry ol Melbourne Australia	Dear dyno, This may not be universally agreed with, but may be useful: www.zaphaudio.com/nondomes/ Cheers

11th May 2007, 02:56 PM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	https://secure.wilmslow-audio.co.uk/...283283dbf845f6 /sreten.

13th May 2007, 08:25 AM	#5
dynoPort diyAudio Member Join Date: Oct 2004 Location: Cymru/Wales	I'm considetring the visaton magnetostat, not a true ribbon but a good tweeter I think. the Precide Heil amt is interseting but probably not available for diy. any thoughts on crossovers!

13th May 2007, 09:52 AM	#6
Taco diyAudio Member Join Date: Nov 2002 Location: Place in the Netherlands	Visaton is a good choice. If you want to use AMT, you can consider the Eton ER4 or the Mundorf AMT tweeters (both are very expensive).

18th May 2007, 06:59 PM	#7
dynoPort diyAudio Member Join Date: Oct 2004 Location: Cymru/Wales	How would you compensate for different sensitivity in your tweeter/mid-base units, in the crossover I mean. I have an old version of this: http://www.voltloudspeakers.co.uk/Lo...y_bm220_8.html which I already have a reflex cabinet for and would have the tweeter atop of it in its own little housing. At the moment I’m thinking of partnering it with a Visaton MHT 12 which apparently needs a 12db, 2nd order crossover (at 3000khz). Any thoughts you experts…!

18th May 2007, 07:06 PM	#8
dynoPort diyAudio Member Join Date: Oct 2004 Location: Cymru/Wales	Is it as easy a this?! http://www.bmm-electronics.com/Produ...roduct_ID=1940

20th May 2007, 09:35 AM	#9
dynoPort diyAudio Member Join Date: Oct 2004 Location: Cymru/Wales	UPDATE… if anyone’s still interested…I've been doing research Still in the thinking about it stage… a 2nd order crossover; I have some capacitors, and resistors for sensitivity balancing (called a L something), will get some inductors calculated to nearest: .68mh somewhere to start from. As for phase, if the tweeter is set back from the mid/woof @ 3000hz crossover would that do instead of reversing the polarity of the tweeter? And by how much? Is there a calculation or by trial & error?

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