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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 18th Jul 2019, 6:50 pm   #1
EF80TVVALVE
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Default 'Blown' speaker repair help

Hi all,

I've recently had a problem with the speaker in my car and thought I would get it out and try to repair it. It is a mid 1980s VW speaker and surprisingly still the original date stamped from 1985.

It has recently started distorting at any volume and I was expecting to see a damaged cone, but it actually looks fine. When I tried it I pressed onto the cone and it started working as it should whilst I applied pressure but soon distorted again once my fingers were off. There's no coil rubbing or anything bad, just wondering if there is anything I can do to fix it before I buy a replacement.

If anything I would say that the edges of the cone feel a bit thinner and they obviously have some kind of finish applied, maybe to help tighten up the edges of the cone?

I've attached a photo just to show the condition.
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Old 19th Jul 2019, 6:08 am   #2
tony brady
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Default Re: 'Blown' speaker repair help

I expect one of the braided wires has broken at one end.

with care they can be soldered to repair the break though access could be tricky
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Old 19th Jul 2019, 9:51 am   #3
boxdoctor
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Default Re: 'Blown' speaker repair help

It might be worth checking that the speech coil is not becoming detached from the cone. This can be done by careful inspection in a good light, and gently physically moving the cone at the same time.
If detachment is observed/suspected, judicious application of a minimal amount of an acrylic adhesive may save you the expense of a new speaker. Tony
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