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Tweeter quest

Dear All,

I heard a really good ribbon tweeter over the weekend. Its spurred me on with an idea I have had for some time - namely replacing the vifa tweeter in my pmc mb2-xbd-a with something of the standard of the rest of the drivers. What ribbon units would people recommend as being the best around? In addition what are the pros and cons of ribbon v. electrostatic. What are the best electrostatic tweeters currently?

So far the following have been suggested:

BG NEO3-PDR PLANAR TWEETER w/BACK CUP
http://www.partsexpress.com/pe/showd...number=264-735

Raal 70-10
http://www.raalribbon.com/products_flatfoil_70-10.htm

Raven R3.2 MMX
http://www.orcadesign.com/products/raven/ravenr3.htm#

HI-VI RT1L ROUND PLANAR TWEETER
http://www.partsexpress.com/pe/pshow...TOKEN=40236284
http://www.swanspeaker.com/product/htm/view.asp?id=226

Regards,

Nick.
brizonbiovizier
ngjockey
1,042 posts
 
Since that PMC is all active, perhaps the DEQX would help with the conversion, among other things.
brizonbiovizier OP
124 posts
 
Volt radial bass driver and PMCs own midrange.

Yes I might use the deq to help out as well.
shadorne's avatar
Ag insider logo xs@2x
shadorne
7,333 posts
 
I agree with Gregm, matching the tweeter to the other drivers is very important ... I am not sure what the effect is called but "speed" is a very good word for it...in essence the match affects how instruments with some HF harmonics sound to the ear. An instrument will have a tangible sounding timbre when this is well matched...almost real. If poorly matched then the instrument feels less tangible or real....although this depends on the listeners experience with the timbre of real instruments.
brizonbiovizier OP
124 posts
 
Yes I think they need to match - I was looking at one of the hivi isoplanar ribbons perhaps as they are more like conventional tweeters in shape and dispersion.
jtgofish
209 posts
 
Rather than replace rhe Vifa tweeter you might be better of supplementing it with a ribbon used as a semi-super tweeter.I have found this works very well,especially with the 19mm Vifa tweeters.You can just sit the ribbon on top of the speaker and use a 0.5 mF cap to protect it and roll it off below 12000hz[approximately if it is 8 ohm].I would be hesitant to use anything of higher value than 0.5 mF .There is some risk of damage with first order crossover below this point,although I have used 1 mF on my Fountek JP2 without problems.

JT
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