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Multi-Way Conventional loudspeakers with crossovers

How to open E-V TRX12B speaker to change caps?
How to open E-V TRX12B speaker to change caps?
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Old 24th June 2017, 04:38 AM   #21
nfafan is offline nfafan  United States
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Join Date: Feb 2015
Well, thanks all for the replies. If nothing else, maybe the pics will help the next bloke who comes across a pair of 12TRXBs and wonders what is inside.
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Old 26th June 2017, 03:08 AM   #22
paba is offline paba  Canada
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Well that tweeter T35B needs a cap. Either internal or external but no way that a tweeter can run fullrange. So if it isnt damaged you should aim for a value that brings you near the recommended crossover point of 3.5kHz. I actually cross my T35 (same tweeter on the LT-15) a little higher. If you want i can check the value of my caps.

http://www.cieri.net/Documenti/Istru...5B,%20T350.pdf

Recommended crossover was the x-36 for a standalone T35/T-35B
http://www.electrovoice.com/binary/X...Data_Sheet.pdf

http://www.mcmlv.org/Archive/HiFi/El...oice12TRXB.pdf

Last edited by paba; 26th June 2017 at 03:14 AM.
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Old 26th June 2017, 03:45 AM   #23
nfafan is offline nfafan  United States
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Quote:
Originally Posted by paba View Post
Well that tweeter T35B needs a cap. Either internal or external but no way that a tweeter can run fullrange. So if it isnt damaged you should aim for a value that brings you near the recommended crossover point of 3.5kHz. I actually cross my T35 (same tweeter on the LT-15) a little higher. If you want i can check the value of my caps.

<snip>
Yes, Please!! And thank you!!
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Old 4th July 2017, 01:57 AM   #24
paba is offline paba  Canada
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Join Date: Sep 2004
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Ok sorry for the delay in response.

So original cap on my tweeter horn was 3uf
I replaced with a high quality sandwich of (0.47+0.52+0.52+0.01)=1.52uf
I started with just 0.47 and the small bypass 0.01uf and added untill i liked it. That's why I ended up with two units of .52. If i new i would stop at 1.5 i probably would have started and ended with a good 1.5uf cap from the start but i kept this sandwich because the money was spent. Trashing that and re-spending on a single 1.5 uf unit wasn't in the cards.

Thanks
Paba
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Old 6th July 2017, 10:24 PM   #25
nfafan is offline nfafan  United States
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Join Date: Feb 2015
Thanks all for the replies, and especially you Paba for digging the info out of your speakers as I lnow they are not easy to open up.

I have taken my E-Vs out of service for now until I get the parts and pieces together, so far I do not think I did any damage to the tweeter, but want to play it safe.

Thanks again all!
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