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Old 8th February 2003, 03:02 PM   #1
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Question 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!!!!!
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Old 8th February 2003, 04:35 PM   #2
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Is it neccesary to youse impedans korrektion on this tweeter??
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Old 9th February 2003, 01:26 AM   #3
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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.
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Old 9th February 2003, 02:22 AM   #4
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Just out of curiosity, how do you do a 4th order LR with no inductor in parallel?

-Paul
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Old 9th February 2003, 04:01 AM   #5
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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,
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Old 9th February 2003, 04:07 AM   #6
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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
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Old 9th February 2003, 07:47 PM   #7
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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
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Old 9th February 2003, 07:50 PM   #8
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A First Order is fine on one of these since their Fs is just 500Hz.

Cheers,

Hugh
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Old 9th February 2003, 07:53 PM   #9
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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
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Old 9th February 2003, 07:54 PM   #10
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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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