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Finding Speaker Resistance


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coppellstereo 
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Posted: December 04, 2005 at 12:57 AM / IP Logged  

The speaker is brand new.  I also tested my existing sub which is supposedly running at 1.9 ohms.  The ohmeter is brand new as well.  But both speakers were reading infinity.  Still cant figure out what i am doing wrong!

geepherder 
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Posted: December 04, 2005 at 6:29 AM / IP Logged  

Okay, you said your meter has a needle.  It sounds like you're using an analog meter on the wrong scale, and the needle is pegged.  This can damage your meter.  If you touch the leads together does it read zero?  If your meter is new, look in the manual for any clues.

However, I still suggest picking up a digital multimeter.  If you're going to be testing any wires in a vehicle- analog meters are dangerous like test lights.

My ex once told me I have a perfect face for radio.
DYohn 
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Posted: December 04, 2005 at 10:18 AM / IP Logged  
What's the make/model of the meter?
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coppellstereo 
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Posted: December 04, 2005 at 3:05 PM / IP Logged  

Ok, so maybe i was remembering wrong.  When I touch the leads the meter reads zero, just like when i test the subs.

so, clarification - the meter reads zero.  So how do i calibrate the meter?  is it the red dial?

coppellstereo 
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Posted: December 04, 2005 at 5:08 PM / IP Logged  
the sub is DVC by the way
geepherder 
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Posted: December 04, 2005 at 5:38 PM / IP Logged  
It very well could be the red dial.  When you short the leads, you adjust it to read zero.  If your subs read zero, they're either shorted, or you could have messed up your meter by pegging the needle.
My ex once told me I have a perfect face for radio.
DYohn 
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Posted: December 04, 2005 at 6:29 PM / IP Logged  

Like I asked earlier,

DYohn wrote:
What's the make/model of the meter?

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coppellstereo 
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Posted: December 04, 2005 at 7:21 PM / IP Logged  

when i touch the probes together it reads perfect zero. 

GB Instruments  GMT-12A (brand new)

DYohn 
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Posted: December 04, 2005 at 10:13 PM / IP Logged  
Never heard of it.  I looked it up on the web and it appears to be a very cheap, very limited meter with only one ohm range?  What is the range (what does it say in green under the word "ohms"?)  In any case, I would guess it is simply not accurate or sensitive enough to measure low resistance.
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coppellstereo 
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Posted: December 04, 2005 at 10:28 PM / IP Logged  

that might be true.  it says 1k, but i swear in the instructions it talks about a switch that you can adjust to just measure ohms instead of 1k ohms.

But the only switch is the red dial used to zero out the ohmeter

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