Loudspeaker 4 or 8 Ohm?

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astaib
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Re: Loudspeaker 4 or 8 Ohm?

Post by astaib »

Rick,

Crystal clear now! So i don't need the wrench that Steve advised I guess.

I will let you know.

I can see a Renault car logo inside the maplight is it correct? !!

Thank you again.

Arnaud
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Steve
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Re: Loudspeaker 4 or 8 Ohm?

Post by Steve »

Arnaud:

Mine is a very early model (2001), so it may be different than yours. I had to use the wrench to remove one of the grounding straps in order to slide the speaker out. It has been many years, so I don't remember exactly, and I didn't take pictures.

Steve
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rwtucker
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Re: Loudspeaker 4 or 8 Ohm?

Post by rwtucker »

What is blowing out on these speakers? Is it the voice coil (zero ohms across terminals) or is it degraded cone material and/or suspension rim?
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Rick
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Re: Loudspeaker 4 or 8 Ohm?

Post by Rick »

rwtucker wrote:What is blowing out on these speakers? Is it the voice coil (zero ohms across terminals) or is it degraded cone material and/or suspension rim?
In my case, the paper cone had torn and partially separated from the suspension ring. I believe the coil was still good, because it did make some scratchy noises before I replaced it.
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Rich
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Re: Loudspeaker 4 or 8 Ohm?

Post by Rich »

Correct - it's the paper diaphragm that's giving up. And very likely because of air pressure in the plenum in which it lives.
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rwtucker
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Re: Loudspeaker 4 or 8 Ohm?

Post by rwtucker »

The ideal speaks for that application would have a mylar cone and be restricted to mid-range frequency response. Such speakers are common in ham radio and similar transceivers designed for outdoor use. The have a narrow frequency response that optimizes the voice range and suppresses higher and lower frequencies. Not a perfect fit but, for example: https://www.gigaparts.com/mfj-281.html? ... gJxyPD_BwE
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Kurt h
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Re: Loudspeaker 4 or 8 Ohm?

Post by Kurt h »

Mine blew out around the cone for the air pressure reasons mentioned above, but still seems to work fine with good clear audio. Since I live in Houston, this is just another much needed air vent! :)
Kurt
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