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Speech coils

 
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Speech coils

Post by crackle » Wed Oct 07, 2015 6:28 am

I recently bought a couple of Leak 2060 speakers.
I found when I got home one had a fault on the tweeter, the wires were corroded between the terminals and where they entered the diaphragm.

It was very difficult trying to tin and attach a new length of thin wire to the remains of the old wire leaving the speech coil.
It made me wonder, did they use aluminium wire on some of these tweeters?

Anyway all working now and they have added a new dimension to my listing pleasure, the mids and high notes are very much improved, in fact I have turned the treble down a notch.

I wonder how old they are, would you think about 1972?

Mike

 
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Re: Speech coils

Post by Cathovisor » Wed Oct 07, 2015 7:49 am

They're in my 1975 Hi Fi Year Book: rated at 50W (DIN), they were £68.70 when new. I think they formed part of the Leak 2000 series of hi fi equipment.

 
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Re: Speech coils

Post by crackle » Wed Oct 07, 2015 9:08 am

Hi
I have also just found reference on the internet to a 1974 Leak catalogue in which they are mentioned.
http://www.world-designs.co.uk/forum/sh ... php?t=1910

Thanks
Mike

 
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Re: Speech coils

Post by Herald1360 » Wed Oct 07, 2015 9:53 am

Ally voice coils have been used but I would have thought that there would be fatigue problems using it for the tails. Enamelled tinsel wire would likely be a bugger to solder, though.

 
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Re: Speech coils

Post by sideband » Wed Oct 07, 2015 11:25 am

I repaired a pair of Wharfdale speakers once by replacing the 'tails' with fine coax outer screening. It was taken from thin audio coax and was very flexible. The tails were soldered to eyelets attached to the cone so easy to unsolder. Never had any more problems with them and many years later, sold them on.

 
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Re: Speech coils

Post by nuvistor » Wed Oct 07, 2015 1:03 pm

Another vote for the screening from small diameter coax, worked well for me when repairing the 'tails' on speakers.

Frank


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