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Multi-Way Conventional loudspeakers with crossovers

Anyone know Airborne RT5002 tweeters?
Anyone know Airborne RT5002 tweeters?
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Old 21st June 2018, 02:53 PM   #1
msh1999 is offline msh1999  Israel
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Default Anyone know Airborne RT5002 tweeters?

I got a pair for a project i never did.
Anyone know this Model and can help me a little with a Crossover design for this specific tweeter?
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Old 21st June 2018, 03:49 PM   #2
ernperkins is offline ernperkins  United States
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Ben (wolf_teeth here, just wolf everywhere else) did a design called Nephila with a HiVi F6 and RT-5002. Here's a LINK. Page 3 has the full crossover description. Maybe he'll chime in when he sees this.
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Old 21st June 2018, 10:55 PM   #3
wolf_teeth is offline wolf_teeth  United States
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Great tweeters! Waddaya wanna know?

Thanks for the rec, Ed!

Later,
Wolf
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Old 23rd June 2018, 09:13 PM   #4
msh1999 is offline msh1999  Israel
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the Nephila was actually my build attempt which I eventually abounded

i was told ribbons tend to have problematic impedance and i should be be extra careful when making crossover so i wont fry my amp.

i got a speaker that i took the tweeter from, and i can play around with the RT5002 with it, i need to know which FR should i cross and if i should be some kind of low pass or something with it before i start playing around with it.

in door measure of the speaker, without tweeters ofc :

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Old 23rd June 2018, 11:07 PM   #5
wolf_teeth is offline wolf_teeth  United States
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Whomever told you that was likely speaking of true-ribbon tweeters, which are near a dead-short at lower frequencies due to the transformer and how it works. The RT5002 is an AMT and has no transformer, so it's basically a resistive load.

What do you mean you abounded it? Attempted and never completed? Or messed it up in the process? Can I help in any way?

Later,
Wolf
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Old 24th June 2018, 12:09 AM   #6
msh1999 is offline msh1999  Israel
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I only got the tweeters and too many other projects to finish, thanks anyway

so i can basically try first order and see how it goes from there, thats great to know.
you got any suggestion to where to drop the cross point first?
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Old 24th June 2018, 01:41 AM   #7
wolf_teeth is offline wolf_teeth  United States
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I would not think 1st order would protect the AMT as much as required unless used at a much higher cutoff frequency. The RT5002 really is only good to about 3.3-3.5kHz range before it rolls off, and it has a peak in it's FR at about 15kHz before it rolls off again on the top. However, it does have enough sensitivity to fix these attributes a smidge and keep it and you happy.

I included the xover for the Nephila in the case it will help you.

Later,
Wolf
Attached Images
File Type: jpg RT5002-OnAxis.jpg (45.5 KB, 75 views)
File Type: jpg RT5002-HD.jpg (60.5 KB, 75 views)
File Type: jpg Nephila5C Xover.jpg (143.8 KB, 75 views)
File Type: jpg RT5002-CSD_Vance.jpg (24.8 KB, 24 views)
File Type: jpg RT5002H.jpg (48.2 KB, 20 views)
File Type: jpg RT5002V.jpg (48.0 KB, 19 views)
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Old 24th June 2018, 02:06 AM   #8
msh1999 is offline msh1999  Israel
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I guess there is no way around it, thanks for the info, i will put this side project aside for now since parts would cost me around 60$ assuming it would work with what I got. and i dont have any dollar to fool around d more than I already have atm.

thanks a bunch
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Old 25th June 2018, 02:04 PM   #9
msh1999 is offline msh1999  Israel
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playing a bit with the tweeter in 3 way, I like it!
supposedly crossed at around 5500hz (1\6 smoothing)
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Old 25th June 2018, 02:52 PM   #10
msh1999 is offline msh1999  Israel
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update
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Click the image to open in full size.
getting there (im not measuring from same spot but i do take 3-4 to confirm whats pretty much going on there)
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