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Kef Cantata "midrange not working"

 
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Tropicalpests
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Joined: 09 Jan 2005
Posts: 1

PostPosted: Sun Jan 09, 2005 5:05 pm    Post subject: Kef Cantata "midrange not working" Reply with quote

I have some older Kef,s Cantata,s that I recently took back out of storage ( ten years ) I,m not sure but I think the mid-range is fried on one of them, it worked on and off for a minute or two then quit. I took the driver out and the only number on it is ( SP1057 ) My question is how do I trouble shoot-it? Is there an easy way with out disconnecting it from the wiring harness? They are considered a large bookself speaker, but they are floor standing with rolling castors............... UPDATE.....I posted this message this morning and this afternoon I found out by directly attaching a live speaker wire to the mid-range that the mid- range works!!!!!... Must be somthing else!!???
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Gary
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Joined: 07 Nov 2004
Posts: 275
Location: Toronto, Canada

PostPosted: Sun Jan 09, 2005 7:59 pm    Post subject: Reply with quote

Hmmm.... sounds like the crossover? Pehraps a capacitor is partially "blown"?

Did you check to make sure the wires had solid connections?
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ColinR
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Joined: 31 Jul 2004
Posts: 1175
Location: Staffordshire

PostPosted: Mon Jan 10, 2005 12:19 am    Post subject: Reply with quote

Hope you've checked the 0.8 Amp fuse Embarassed

If the fuse is ok, the mid and treble switches get oxidised/sulphidised over time so unscrew the metal panel and clean them.
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cryptfactor
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Joined: 04 Apr 2006
Posts: 4

PostPosted: Tue Apr 04, 2006 1:18 am    Post subject: your cantata Reply with quote

Assuming the fuse has not failed, the wafer switches (mid. control) could be to blame. Try moving it rapidly back and forth; does it sound 'noisy'? I doubt that the drive unit is open circuit, though its easy to check with a meter. I'd be even more surprised if there was a problem with the crossover.

Good luck
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