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Post by Stan on Dec 18, 2013 9:58:30 GMT -7
I just purchase a new Red Fang 10"
nowhere on the speaker is there a designation of the rated ohm of the speaker,
the invoice had the ohm's that's all.
so i'm trying to be sure what i got is what i asked for?
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Post by djc (Dave) on Dec 18, 2013 10:14:20 GMT -7
Do you have a multimeter? If so put it on the ohm setting and put a lead on each side of the speaker taps and you should get a reading close to what you ordered, usually just a little under the number. I just tested 2 speakers that I own that are marked 8 ohm and one read 7.3 and the other 6.8!
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Post by Stan on Dec 18, 2013 10:31:20 GMT -7
thanks djc yes i have multimeter what does the ohm setting/icon look like?
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Post by Ridgeback on Dec 18, 2013 10:38:27 GMT -7
Omega Looks kind of like a fancy upside down capital U but most meters will say ohms or resistance in addition to the symbol. You are actually measuring impedence which is why the reading will be a bit less than the ohms rating.
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Post by Stan on Dec 18, 2013 10:40:35 GMT -7
thanks ridgeback ">)
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Post by Mark (Basement Enthusiast) on Dec 18, 2013 14:32:39 GMT -7
Stan, if you find an Eminence sticker anywhere on it, you might find a product code with either an A, B, or C at the end. I'm pretty sure A = 8 ohms and B = 16 ohms (and C = 4 ohms).
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Post by Stan on Dec 18, 2013 15:35:50 GMT -7
Stan, if you find an Eminence sticker anywhere on it, you might find a product code with either an A, B, or C at the end. I'm pretty sure A = 8 ohms and B = 16 ohms (and C = 4 ohms). I had a look see and no small stickers of any kind, just the Big one with Red Fang and so on, bell cover.
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Post by freddieg on Dec 18, 2013 16:34:59 GMT -7
Meters measure DC resistance only.
Speakers have some level of "reactance" or you can kind of think of it as AC resistance. But a normal hand held voltmeter can't detect it.
Anyway, an 8 ohm speaker will measure less than 8. Probably about 6 ohms ish.
A 16 ohm speaker will measure 12 or so?
Anyway that's my "I'm too lazy to really think too hard these days" answer....
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Post by Stan on Dec 22, 2013 8:21:07 GMT -7
now to learn how to operate the Meter
the two I have, have adjustments for the ohm readings,
so what do I use as a base line >
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Post by freddieg on Dec 22, 2013 12:56:26 GMT -7
Umm, there shouldn't be an adjustment for ohms - I don't think ?
Just touch your leads together, it should read zero - or beep at you. Then measure. You shouldn't have to calibrate it.
Also never measure voltage while on the ohm setting. You can blow up your meter that way.
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Post by Stan on Dec 22, 2013 13:19:03 GMT -7
Umm, there shouldn't be an adjustment for ohms - I don't think ? Just touch your leads together, it should read zero - or beep at you. Then measure. You shouldn't have to calibrate it. Also never measure voltage while on the ohm setting. You can blow up your meter that way. ok i'll try to set it at zero while touching leads
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Post by Ridgeback on Dec 22, 2013 13:19:05 GMT -7
Oh yeah, and make sure the speaker isn't connected to the amp when you do the reading or you will get something weird.
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Post by texan2step on Dec 23, 2013 22:07:59 GMT -7
now to learn how to operate the Meter the two I have, have adjustments for the ohm readings, so what do I use as a base line > Stan, I believe what you are referring to the range selection on the meter. Some meters are auto ranging meters so it'll read the resistance no matter how high or low the resistance. Other meters you have to select the range. I would choose the lowest setting, usually 100 ohms or so. You won't be reading much so set it at the lowest setting.
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Post by Stan on Dec 24, 2013 5:43:48 GMT -7
thanks for all the help, I set the meter to zero, I'm only getting a reading around 3ish, but I checked a know & labeled 8ohm speaker and I get the same 3ish so I have confirmation that both are 8ohm, which is the result I was looking for.
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Post by wubberdubber on Dec 30, 2013 21:52:03 GMT -7
I always set my digital meter at the lowest ohms setting to test a speaker. And, the reading will always be a bit lower than what the speaker is rated for (without a load), For example, if it's an 8 ohm speaker, it may read 6.8, or if it's a 16 ohm it may read 13.-something....that's normal.
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Post by Stan on Dec 31, 2013 6:54:13 GMT -7
I could never figure out the 2 meters I had, I was getting readings around 3ohm for a 8ohm speaker in the end. So I had a known 8omh speaker lying around which I compared with the unknown and the readings are the same so sounds like both are 8ohm, which is what I wanted so all is good.
I found just a bit strange that a brand new Red Fang has no markings of it's impedance.
I wanted to confirm before I installed the new Red Fang that I got what I ordered.
Kudos for all the help.
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