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Old 08-20-2008, 06:31 PM
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Delco Radio Speakers

The older Delco radios need 10 ohm speakers. I'm advised that installation of speakers with less ohms cause the radio to see the speakers as a short and damage the radio. At some point they apparently changed to speakers with lesser ohms.

Does anyone know when this occurred? I'm having a problem with my 80s vintage El Camino. I keep "losing" radios and I'm wondering if I should have speakers with more ohms.

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Old 08-21-2008, 05:20 AM
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From what I remember of those radios, the standard speakers used to be 8 ohms. Later ones have switched to 4 ohms.

Using a 4 ohm speaker may cause problems with overdriving the power amp at high volume, but its not equivalent to a short circuit. Do you run at really high volume levels with your vintage radio?

One simple solution to protect the radio is to add another 4 ohm speaker in series with the ones you have. If the current ones are dash or in-door speakers, add a second set in series up under the dash pointed down. Two 4 ohm speakers in series (positive of one speaker connected to negative of the other) will get you 8 ohms. It would be probably best for sound quality if the two speakers are matched in size and type.

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Old 08-21-2008, 06:40 AM
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The problem is occurring in my '86 El Camino.

I've "lost" two radios now. I replaced the two original dash speakers with some cheapies from Walmart. I couldn't justify big dollar speakers for an occasional driver that usually only plays oldies.

I'm not a high volume listener so it wouldn't appear to be from that. My thought was maybe the speakers were causing the problem.
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