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blown t27s - any ideas?

 
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Christopher Lord
Junior Contributor 10+


Joined: 11 Mar 2007
Posts: 10

PostPosted: Fri Jul 27, 2007 2:58 pm    Post subject: blown t27s - any ideas? Reply with quote

I have just bought a pair of t27s to put into a pair of Concertos, which had other tweeters installed when I bought them. They still have the original crossovers. Both speakers sounded great - it was the first time I had heard the cabinets with all the correct speakers. But after about one minute in each case the tweeters seem to have died. One has that scratchy blown speaker sound, and the other is completely dead. Can anyone think of a reason/explanation? I connected them with a signal coming through the speakers, but I can't see how that would have damaged them. Is there any chance of fixing them? Any ideas welcome.
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ColinR
Über Contributor 1000+


Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Fri Jul 27, 2007 4:49 pm    Post subject: Reply with quote

Quote:
still have the original crossovers


Electrolytic capacitors turn into resistors over time and running a "old" tweeter full range doesn't do it a lot of good.


Quote:
chance of fixing them


No, I've never seen any KEF redome kits for sale and a rewind would cost >£40 so they're bin fodder or large fridge magnets.
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speakerguru
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Joined: 18 Nov 2005
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PostPosted: Fri Jul 27, 2007 4:57 pm    Post subject: Reply with quote

Does sound bad, but also unlikely. Are you certain both have died? Do the old tweeters stil work with those XOs? Can you get any sort of resistance reading from the T27s? Were you playing particularly loudly? How big is the amplifier?
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