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Old 22nd October 2005, 11:48 PM   #1
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Default Vintage Isophon Problem

I have found some really nice two way axial isophone 6 X 12 speakers in cabinets at the thrift store. They look like really nice dirvers but the voice coils in the mid bass drivers are separating from the formers. Does anyone have any suggestions for taking these apart and glueing the coils back on???


I'm thinking of using acetone to dismount the cones and spiders and then using a strong and light cement to glaze over the coils to hold them still and then glueing the cones and spiders back into place.

I think Planet10 must know something about these speakers...
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Old 23rd October 2005, 01:51 AM   #2
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I found some pictures of this model on the net.
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File Type: jpg isophon.jpg (24.9 KB, 214 views)
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Old 23rd October 2005, 01:52 AM   #3
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Another
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Old 23rd October 2005, 01:59 AM   #4
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They do indeed look like nice drivers.

Hope you get them sorted.
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Old 23rd October 2005, 02:16 AM   #5
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yeah, me too. Unfortunately one of them grinds more than I first noticed. It's quite possible that the previous owner simply overdrove them badly and melted the coils.

Luckily the DC resistance of the coils is in check: 3.2 ohms an the midbasses and 4.6 ohms on the tweeters. At least the coils haven't been roasted...
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Old 24th October 2005, 03:08 AM   #6
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Can anyone help me an this?
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Old 25th October 2005, 06:15 AM   #7
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Hello? Anyone? planet10???? I know you're good with this stuff.
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Old 26th October 2005, 07:28 AM   #8
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Well, the first one is working now. It was very difficult as I had to re-wind a portion of the coil and re-align the entire setup. After five hours of work I have a working driver.

It sounds really good.
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Old 6th November 2005, 01:35 AM   #9
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Okay, I have both mid-basses working beautifully now but I have realized upon close listening that one of the tweeters has a problem.

It sounds like it has a loose voice coil too but it could be something elso like a detaching VC bobbin.

Any ideas anyone?
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