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Discussion Starter #1

Hi,

I am trying to find out the OHM's of my Speaker, when using a Multi Meter and changing the setting to OHMS - 2000 I get this reading...

https://www.dropbox.com/s/t3q52epou6o1zut/DSC_1109.JPG

When changing the setting to OHMS - 200 I get this reading.. 

https://www.dropbox.com/s/s2k7rsyqfrmqv86/DSC_1108.JPG

By looking at these readings is my Speaker a 4 OHM or a 1 OHM?
I read on the internet if the readings are going all over the place then it usually means you have a blown  sub woofer  how ever my  sub woofer works perfectly so now im confused because I have no idea how many OHM's my Speaker is 
 Any ideas ??
 

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You're getting different readings because of the tolerance level of the meter. You'll get a much more accurate result on the 200 ohm range. The DCR of an 8 ohm speaker will typically run between 5 and 7 ohms.

BTW, you're not trying to determine how many ohms your speaker is, you're trying to determine its impedance, which is expressed in ohms.
 

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8 ohms ) they usually measure ~ 6Ω to ~ 8Ω nominal. In photo 8 you had the meter set correctly at 200Ω or less range in photo 9 it was incorrectly set at K Ω range .
 

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Discussion Starter #4

Quote:
Originally Posted by Bill Fitzmaurice  /t/1526474/how-many-ohms-is-my-speaker#post_24584753


You're getting different readings because of the tolerance level of the meter. You'll get a much more accurate result on the 200 ohm range. The DCR of an 8 ohm speaker will typically run between 5 and 7 ohms.

BTW, you're not trying to determine how many ohms your speaker is, you're trying to determine its impedance, which is expressed in ohms.
First of sorry for the delayed reply.. I already used the 200 ohm range and got the different numbers ranging from 066 to 072 wht do these mean?? Oh so its called impedance not ohms.. Just many people called it ohms so i called it the same thing haha
 

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Discussion Starter #5

Quote:
Originally Posted by tubetwister  /t/1526474/how-many-ohms-is-my-speaker#post_24584776


8 ohms ) they usually measure ~ 6Ω to ~ 8Ω nominal. In photo 8 you had the meter set correctly at 200Ω or less range in photo 9 it was incorrectly set at K Ω range .

But when its set at 200 range why am I getting the random numbers ranging from 062 to 072? And the meter wasnt set at K range its set at 2000 range and the reading I get when its at 2000 range is 004, What does this mean? .. Long story short ... By looking at those pictures could anyone tell me how many OHM's my speaker is because I am confused???
 

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Seems like you are trying to measure a subwoofer 's speaker. You will have to take one wire off of the speaker itself. Using your 200 ohm range, touch the leads to the speaker. I know this is not a way to measure impedance, but this kinda works. Speakers that I measured this way always come close to the impedance rating.
 

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Is that 72 ohms or 7.2 ohms. If it's jumping around between 60 and 80 or what ever I wouldn't doubt if there's a bad connection. Maybe even the connection with your multi meter leads. I've had that before and I have to just get the leads tightly connected and then I get a clean reading.
 

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Discussion Starter #8

Quote:
Originally Posted by tuxedocivic  /t/1526474/how-many-ohms-is-my-speaker#post_24590342




Is that 72 ohms or 7.2 ohms. If it's jumping around between 60 and 80 or what ever I wouldn't doubt if there's a bad connection. Maybe even the connection with your multi meter leads. I've had that before and I have to just get the leads tightly connected and then I get a clean reading.


 



That says 72 ohms it shouldn't be reading that it has to be 7.2 ohms but I don't get why it says 72
.. I now removed the wire that was on the speaker itself and then checked the readings and these are the readings I got... I have also included pictures of what my sub woofer looks like and the brand name of it etc...



 



https://www.dropbox.com/s/odgfztt1y9votl4/DSC_1114.JPG

https://www.dropbox.com/s/r3y67vil5c5pny2/DSC_1115.JPG

https://www.dropbox.com/s/zij9ptx6kz9otsq/DSC_1116.JPG

https://www.dropbox.com/s/wwonwde1ejwsw98/DSC_1117.JPG

https://www.dropbox.com/s/gbryg38inwwgyno/DSC_1118.JPG

https://www.dropbox.com/s/6qz9lmpsta8w4t9/DSC_1119.JPG

https://www.dropbox.com/s/1fongd9qco73iqm/DSC_1120.JPG



 
 

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Discussion Starter #9

Quote:
Originally Posted by Skytrooper  /t/1526474/how-many-ohms-is-my-speaker#post_24590218


Seems like you are trying to measure a subwoofer 's speaker. You will have to take one wire off of the speaker itself. Using your 200 ohm range, touch the leads to the speaker. I know this is not a way to measure impedance, but this kinda works. Speakers that I measured this way always come close to the impedance rating.
 

Yes it is a Sub woofers speaker that I am measuring. I have now taken one wire off the speaker itself and have taken pictures to show the readings and have also taken some pictures to show the sub woofer itself.. here are the pictures ... By looking at the sub woofer readings would you be able to tell me how many OHMS it is? for some reason I am starting to think my multi meter is malfunctioning (its not showing the dot between numbers the readings should say 05.3 not 053) will try a new multi meter as well when it arrives (purchased online).  

 

https://www.dropbox.com/s/odgfztt1y9votl4/DSC_1114.JPG
https://www.dropbox.com/s/r3y67vil5c5pny2/DSC_1115.JPG
https://www.dropbox.com/s/zij9ptx6kz9otsq/DSC_1116.JPG
https://www.dropbox.com/s/wwonwde1ejwsw98/DSC_1117.JPG
https://www.dropbox.com/s/gbryg38inwwgyno/DSC_1118.JPG
https://www.dropbox.com/s/6qz9lmpsta8w4t9/DSC_1119.JPG
https://www.dropbox.com/s/1fongd9qco73iqm/DSC_1120.JPG
 

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When I said to take a wire off, I thought it was still connected to a amp. I too am beginning to think you have bad meter leads. Try borrowing someone else's meter.
 

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Quote:
Originally Posted by Skytrooper  /t/1526474/how-many-ohms-is-my-speaker#post_24591142


When I said to take a wire off, I thought it was still connected to a amp. I too am beginning to think you have bad meter leads. Try borrowing someone else's meter.

+1.


I don't know if its the ultra-cheap meter or its leads.


This can be evaluated by shorting the leads together and looking at what that reads. It should be less than 1 ohm.


I think that many electronic stores still have small 10 ohm resistors in stock and measuring them can be a good confirming test.
 

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Discussion Starter #12

Quote:
Originally Posted by Skytrooper  /t/1526474/how-many-ohms-is-my-speaker#post_24591142


When I said to take a wire off, I thought it was still connected to a amp. I too am beginning to think you have bad meter leads. Try borrowing someone else's meter.

I have purchased a new meter online and it should arrive tomorow, i will let you know the results as soon as possible, i appreciate your help
 

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Discussion Starter #13

Quote:
Originally Posted by arnyk  /t/1526474/how-many-ohms-is-my-speaker#post_24591162


+1.


I don't know if its the ultra-cheap meter or its leads.


This can be evaluated by shorting the leads together and looking at what that reads. It should be less than 1 ohm.


I think that many electronic stores still have small 10 ohm resistors in stock and measuring them can be a good confirming test.

When choosing the 200range on the meter I get a +1. And when connecting the red and black wires together I get no numbers on the meter except for the dot.. I will try a new meter
do you by any chance know how many inches this sub woofer is?? The links for the sub are above, i cannot find it anywere on the internet.
 

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Quote:
Originally Posted by hassy786  /t/1526474/how-many-ohms-is-my-speaker#post_24591183

Quote:
Originally Posted by arnyk  /t/1526474/how-many-ohms-is-my-speaker#post_24591162


+1.


I don't know if its the ultra-cheap meter or its leads.


This can be evaluated by shorting the leads together and looking at what that reads. It should be less than 1 ohm.


I think that many electronic stores still have small 10 ohm resistors in stock and measuring them can be a good confirming test.

When choosing the 200range on the meter I get a +1. And when connecting the red and black wires together I get no numbers on the meter except for the dot.. I will try a new meter

Most digital ohm meters use some nonsense reading like +1 to indicate an open circuit. Read the instructions?

Quote:
do you by any chance know how many inches this sub woofer is?? The links for the sub are above, i cannot find it anywere on the internet.

Got a ruler? The diameter of a woofer is umm, the diameter of the woofer from edge to edge.
 

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Quote:
Originally Posted by hassy786  /t/1526474/how-many-ohms-is-my-speaker#post_24591183


do you by any chance know how many inches this sub woofer is?? .
You can determine that with a ruler or tape measure.
 

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Quote:
Originally Posted by hassy786  /t/1526474/how-many-ohms-is-my-speaker#post_24590912

Quote:
Originally Posted by Skytrooper  /t/1526474/how-many-ohms-is-my-speaker#post_24590218


Seems like you are trying to measure a subwoofer 's speaker. You will have to take one wire off of the speaker itself. Using your 200 ohm range, touch the leads to the speaker. I know this is not a way to measure impedance, but this kinda works. Speakers that I measured this way always come close to the impedance rating.

Yes it is a Sub woofers speaker that I am measuring. I have now taken one wire off the speaker itself and have taken pictures to show the readings and have also taken some pictures to show the sub woofer itself.. here are the pictures ... By looking at the sub woofer readings would you be able to tell me how many OHMS it is? for some reason I am starting to think my multi meter is malfunctioning (its not showing the dot between numbers the readings should say 05.3 not 053) will try a new multi meter as well when it arrives (purchased online).  

https://www.dropbox.com/s/odgfztt1y9votl4/DSC_1114.JPG
https://www.dropbox.com/s/r3y67vil5c5pny2/DSC_1115.JPG
https://www.dropbox.com/s/zij9ptx6kz9otsq/DSC_1116.JPG
https://www.dropbox.com/s/wwonwde1ejwsw98/DSC_1117.JPG
https://www.dropbox.com/s/gbryg38inwwgyno/DSC_1118.JPG
https://www.dropbox.com/s/6qz9lmpsta8w4t9/DSC_1119.JPG
https://www.dropbox.com/s/1fongd9qco73iqm/DSC_1120.JPG

Here are some real world measurement. Please notice the home-made test lead made up of a piece of 14 gauge CL2 stranded speaker cable. a banana plug, and a couple of test clips:


8 ohm 250 watt non inductive power resistor:








Loudpseaker driver:





 

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Discussion Starter #17

Quote:
Originally Posted by arnyk  /t/1526474/how-many-ohms-is-my-speaker#post_24591239



Most digital ohm meters use some nonsense reading like +1 to indicate an open circuit. Read the instructions?

Got a ruler? The diameter of a woofer is umm, the diameter of the woofer from edge to edge.
I think the Multi Meter is faulty so I am waiting for another Multi Meter which is being delivered tomorow and will let you know what the results are. and as for the measuring diameter of the woofer, am I measuring the woofer correctly??  https://www.dropbox.com/s/wq840sqk274gec1/DSC_1121.JPG    
 

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Discussion Starter #19

Quote:
Originally Posted by arnyk  /t/1526474/how-many-ohms-is-my-speaker#post_24591567



Here are some real world measurement. Please notice the home-made test lead made up of a piece of 14 gauge CL2 stranded speaker cable. a banana plug, and a couple of test clips:


8 ohm 250 watt non inductive power resistor:








Loudpseaker driver:






 
Thank You for spending your time to take these pictures :) ..I think its just my multi meter which is fault as it should say 05.3 not 053 so when my new meter arrives I will let you guys know what the results are.. Thank You for giving answers, thought I was alone on this haha. 
 
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