Ruark Sabre voice coil replacement - diyAudio
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Old 24th July 2013, 04:58 PM   #1
Icurus is offline Icurus  United Kingdom
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Default Ruark Sabre voice coil replacement

Hi all

Recently acquired a pair of Ruark Sabre speakers, but one was DOA. Upon taking it apart and removing the mid range cone and testing it's impedance I got a zero reading. I guessed the voice coil was shorted, plus I coild see scorch marks on the spider's material.

So I took it apart and found that it was indeed busted!

[IMG]Click the image to open in full size.[/IMG]

I guess someone had put too much power through it, or it has just died with age, either way it was not working.

So to find a new voice coil. Yes, it may well prove better to source some new drivers, I will replace the other one in the other speaker as well, but I would like the challenge of fixing, or attempting to fix, these myself

Does anybody know of a UK supplier of voice coils? Plenty in the USA and China.

Thanks

Peter

Last edited by Icurus; 24th July 2013 at 05:45 PM.
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Old 24th July 2013, 05:41 PM   #2
Mooly is offline Mooly  United Kingdom
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Old 24th July 2013, 05:42 PM   #3
Icurus is offline Icurus  United Kingdom
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Thanks, seems photobucket is not as friendly as it used to be
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Old 24th July 2013, 07:14 PM   #4
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That looks really bad. I'm no expert but i'd have thought the amp would have to be faulty to do that much damage.

Sorry, can't help with the replacement voice coil. I know there are some companies that will repair speakers. I had a Kef B110 repaired by Wembleyloudspeaker.com. They took forever to do the work and when it came back it didn't sound anything like the other one. They fitted a fabric dust cap, when it should have been paper? and sealed.
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Old 24th July 2013, 07:36 PM   #5
system7 is offline system7  United Kingdom
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Bit of an ask to replace a voicecoil on an unknown driver really!

You just buy a pair of new woofers. I'd measure the outer diameter and match the Qts to the box. Looks like SEAS or Vifa to me.

Figure out whether these are polypropylene or paper cones and it shouldn't be hard to find replacements for what is a decent speaker using good drivers and tweak the crossover for level.

We have done this sort of thing before:
designing crossover and enclosure without a data sheet.Help please

The fact is that woofers are woofers really. Much the same.
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Old 24th July 2013, 07:40 PM   #6
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by system7 View Post
The fact is that woofers are woofers really. Much the same.
You think
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File Type: jpg Woofers.jpg (134.5 KB, 26 views)
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Old 24th July 2013, 08:05 PM   #7
Icurus is offline Icurus  United Kingdom
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It is a Vifa driver, sorry, should have been more specific, and its a coated paper cone.

Yes, I may well end up buying a pair of new drivers, but I do want to learn something, and fixing broken things has always been a good route to take
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Old 24th July 2013, 08:13 PM   #8
system7 is offline system7  United Kingdom
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Ah, we're getting there. You need to measure the woofer outer diameter, how many screws and the cutout hole size on the cabinet. Also estimate the volume in litres and establish if it's reflex or closed box.

Vifa/Scanspeak have a fairly consistent range of chassis.

I'd like to see the crossover schematic in some form too.

Measure the outer diameter of the tweeter plate too and find out whether it's soft dome or metal.
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