Vifa xt25 tweeter

Per Nielsen · 8th February 2003, 03:02 PM

Is there someone how can help me , by telling me which kind of crossover, that is good to use with the vifa xt25, the bass unit is a scan-speak revalator the crossover freq. has to be 2900 hz.
It has to sound good!

Help!!!!!

Per Nielsen · 8th February 2003, 04:35 PM

Is it neccesary to youse impedans korrektion on this tweeter??

kingdaddy · 9th February 2003, 01:26 AM

I use a active Linkwitz Riley 4th order at 2.4K with the Revelator 15W8530-K00 and it sounds very good to my ears, I've tried every crossover frequency between 1.9K to 3.2 K and this tweeter performs very well at all of these points. Any inductance in parallel with this tweeter will suck the life out of it IMO.

PaulHilgeman · 9th February 2003, 02:22 AM

Just out of curiosity, how do you do a 4th order LR with no inductor in parallel?

-Paul

kelticwizard · 9th February 2003, 04:01 AM

Paul:

The reason kingdaddy doesn't have to use an inductor is that he uses active crossovers.
http://www.linkwitzlab.com/images/graphics/xo12-24.gif (Put cursor on lower right hand corner to enlarge).

Quote:

Originally posted by kingdaddy
I use a active Linkwitz Riley 4th order at 2.4K with the Revelator 15W8530-K00 and it sounds very good to my ears,

planet10 · 9th February 2003, 04:07 AM

Quote:

Originally posted by PaulHilgeman
Just out of curiosity, how do you do a 4th order LR with no inductor in parallel?

Active XO

dave

Per Nielsen · 9th February 2003, 07:47 PM

Thanks I hope it will sound fine you can hear about it when I have build (proberly late to night)

But if you think there is a better alternative, tell me about it

AKSA · 9th February 2003, 07:50 PM

A First Order is fine on one of these since their Fs is just 500Hz.

Cheers,

Hugh

Per Nielsen · 9th February 2003, 07:53 PM

Which kind of first order?? there is really a lot to choose from??
I am yousing 2rd Butterworth and that does not sound good to this tweeter

PaulHilgeman · 9th February 2003, 07:54 PM

Actually, I have no experience with this tweeter, but it is supposed to get very harsh if not crossed over high enough. It may have a low Fs, but most poeple say that you need >2.4KHz with at least 3rd order on it. Down to 2Khz with 4th order.

I would guess that this is due to the smaller radiating area of the dome compared to smaller tweeters.

-Paul

8th February 2003, 03:02 PM	#1
Per Nielsen diyAudio Member Join Date: Feb 2003 Location: Aalborg, Denmark	Vifa xt25 tweeter Is there someone how can help me , by telling me which kind of crossover, that is good to use with the vifa xt25, the bass unit is a scan-speak revalator the crossover freq. has to be 2900 hz. It has to sound good! Help!!!!!

9th February 2003, 07:50 PM	#8
AKSA diyAudio Member Join Date: Sep 2001 Location: Melbourne, Australia	A First Order is fine on one of these since their Fs is just 500Hz. Cheers, Hugh __________________ Aspen Amplifiers P/L (Australia) www.aksaonline.com

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8th February 2003, 04:35 PM	#2
Per Nielsen diyAudio Member Join Date: Feb 2003 Location: Aalborg, Denmark	Is it neccesary to youse impedans korrektion on this tweeter??

9th February 2003, 01:26 AM	#3
kingdaddy diyAudio Member Join Date: Mar 2002 Location: Fort Worth, Texas	I use a active Linkwitz Riley 4th order at 2.4K with the Revelator 15W8530-K00 and it sounds very good to my ears, I've tried every crossover frequency between 1.9K to 3.2 K and this tweeter performs very well at all of these points. Any inductance in parallel with this tweeter will suck the life out of it IMO.

9th February 2003, 02:22 AM	#4
PaulHilgeman Account Disabled Join Date: Dec 2002	Just out of curiosity, how do you do a 4th order LR with no inductor in parallel? -Paul

9th February 2003, 07:47 PM	#7
Per Nielsen diyAudio Member Join Date: Feb 2003 Location: Aalborg, Denmark	Thanks I hope it will sound fine you can hear about it when I have build (proberly late to night) But if you think there is a better alternative, tell me about it

9th February 2003, 07:53 PM	#9
Per Nielsen diyAudio Member Join Date: Feb 2003 Location: Aalborg, Denmark	Which kind of first order?? there is really a lot to choose from?? I am yousing 2rd Butterworth and that does not sound good to this tweeter

9th February 2003, 07:54 PM	#10
PaulHilgeman Account Disabled Join Date: Dec 2002	Actually, I have no experience with this tweeter, but it is supposed to get very harsh if not crossed over high enough. It may have a low Fs, but most poeple say that you need >2.4KHz with at least 3rd order on it. Down to 2Khz with 4th order. I would guess that this is due to the smaller radiating area of the dome compared to smaller tweeters. -Paul

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