Altec "Studio Monitor" speakers

[leebon]

I have pair of 1976 Model 15 Studio Monitors with 9865 8-A Horn/Drivers and 12" LF speakers. One of my Horns does not work. Can find no loose wires btwn speaker and Network. Am wondering if any of you have any tips on how to trouble-shoot to determine what the problem is. Even tho my base speaker foam seals around edges have deteriorated/crumbled, the base units still work fine

[LICORNE]

Hi,
That is not a big prolem to solve. Probably a burnt wire inside voice coil diaphragm.

So it's completely ded. Hook it up directly to your amp with the volume verry low ,if no sound.

Send it to GPA.


http://www.greatplainsaudio.com/

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[LICORNE]

There is very little info on this model I found
the front cover for literature.

http://www.geocities.com/rafaleconve...?1134958439090


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[MikeInNH]

These are wonderfull speakers. I've owned my pair since 1977.

The design of the diaphram in my opinion has a little flaw. The wires on it tend to break. Other replacement diaphrams don't have this wire. It's re-routed so it doesn't stick out. My guess is that's the problem.

You can either fix it yourself, or get new ones. Since they are this old I'd recommend you getting new ones.

I'd remove the drivers from both and send them to Bill at GPA (Great Plains Audio). Have them replace the diaphrams and remagnatize the drivers. You'd be amazed how well they'd sound after that.

[Todd W. White]

Rather than hook your HF driver directly to an amplifier, I'd recommend connecting the negative terminal of a 9-volt battery to the negative terminal of the driver, then gently touch and remove the positive lead from the battery to the positive terminal of the driver and listen for clicks.

If you hear clicks, in all probability, the diaphragm is ok (although they have been known to still be bad after this test).

No clicks means it's time for a replacement from GPA.