Any success with dome midrange?

Ap · 13th May 2004, 06:42 AM

Have been doing some modelling on both the Jaycar & Vifa dome mids (3") and it seems the xover to woofer integration is really tricky requiring higher order low-pass on the woofer.

http://www1.jaycar.com.au/productVie...&priceMin=&pri
ceMax=&SUBCATID=434

or

http://www.d-s-t.com/vifa/data/d75mx-31-08a.htm

Has anyone had success with them?

sreten · 13th May 2004, 11:04 AM

Yes it is extremely tricky as c/o is usually in the middle of baffle step.

Added to that fundamantal resonance suppression and excursion
limits of the mid-dome also need careful consideration.

An "off the shelf" crossover as suggested by Jaycar is an utter no-no.

sreten.

Ap · 14th May 2004, 05:28 AM

Definitely wouldnt go for an 'off-the shelf' xover.
I seem to get reasonable response using both resonance & impedance Eq, but the parts count for xover gets a bit on the high side (8 components).

Karoliina · 14th May 2004, 12:33 PM

I think the dome midrange could be used in the
center of a waveguide to overcome the baffle problem.
There is one thing to note though: The dome must
not be soft material or you will end up with distortion.
Soft domes are not suitable to waveguides.
Aluminium or titanium dome should work (I suppose).
I haven't tried a waveguide with a dome midrange yet,
but I suspect that it might work with no problem
(of course by assuming that there is also a similarly
sized and shaped waveguide for the tweeter driver).

gary f · 14th May 2004, 12:53 PM

There is some good design using dome midrange such as Vifa D75, Morel MDM 55 or LPG textile dome. But I never heard them.
It is sure that crossover design is easier with a cone mid but the dome design is nevertheless attractive....

F

Ap · 16th May 2004, 11:33 PM

Karolina - by waveguide I guess you mean a type of horn?

Garyf - any more info on designs using the d75/mdm55 or LPG > any links on the web?

Thanks.

13th May 2004, 06:42 AM	#1
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Any success with dome midrange? Have been doing some modelling on both the Jaycar & Vifa dome mids (3") and it seems the xover to woofer integration is really tricky requiring higher order low-pass on the woofer. http://www1.jaycar.com.au/productVie...&priceMin=&pri ceMax=&SUBCATID=434 or http://www.d-s-t.com/vifa/data/d75mx-31-08a.htm Has anyone had success with them?

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13th May 2004, 11:04 AM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Yes it is extremely tricky as c/o is usually in the middle of baffle step. Added to that fundamantal resonance suppression and excursion limits of the mid-dome also need careful consideration. An "off the shelf" crossover as suggested by Jaycar is an utter no-no. sreten.

14th May 2004, 05:28 AM	#3
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Definitely wouldnt go for an 'off-the shelf' xover. I seem to get reasonable response using both resonance & impedance Eq, but the parts count for xover gets a bit on the high side (8 components).

14th May 2004, 12:33 PM	#4
Karoliina diyAudio Member Join Date: Nov 2002 Location: Finland	I think the dome midrange could be used in the center of a waveguide to overcome the baffle problem. There is one thing to note though: The dome must not be soft material or you will end up with distortion. Soft domes are not suitable to waveguides. Aluminium or titanium dome should work (I suppose). I haven't tried a waveguide with a dome midrange yet, but I suspect that it might work with no problem (of course by assuming that there is also a similarly sized and shaped waveguide for the tweeter driver).

14th May 2004, 12:53 PM	#5
gary f diyAudio Member Join Date: Aug 2003 Location: Quebec city	There is some good design using dome midrange such as Vifa D75, Morel MDM 55 or LPG textile dome. But I never heard them. It is sure that crossover design is easier with a cone mid but the dome design is nevertheless attractive.... F

16th May 2004, 11:33 PM	#6
Ap diyAudio Member Join Date: May 2002 Location: Sydney, Australia	Karolina - by waveguide I guess you mean a type of horn? Garyf - any more info on designs using the d75/mdm55 or LPG > any links on the web? Thanks.

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