multimeter testing: ohms load

[livinlegend 10+ year member]

how come when I connect the positive lead to the + of a 4 ohm speaker and the - to the - the multimeter shows an actual ohm load of: .5

how is that possible?

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[jco1385 5,000+ posts]

bad speaker?

 

[stuckinok 5,000+ posts]

yea its a goner

 

[livinlegend 10+ year member]

tried it on 2 different working 4 ohms speakers, but they were both coaxs and both work fine when powered?

 

[livinlegend 10+ year member]

just tried it on a 3rd different speaker and it did the same thing. my multimeter setting is "RX10"

 

[tsenfw 10+ year member]

make sure you're not touching the cone at all and put the probes on so they stay by themselves and you're not touching the speaker.

DOn't know what RX10 is. It should just be on the resistance setting on the right range if your DMM isn't auto ranging. Look for the resistance symbol, it looks like a horseshoe.

 

[livinlegend 10+ year member]

make sure you're not touching the cone at all and put the probes on so they stay by themselves and you're not touching the speaker.
DOn't know what RX10 is. It should just be on the resistance setting on the right range if your DMM isn't auto ranging. Look for the resistance symbol, it looks like a horseshoe.

yeah its on the resistance setting, i dunno wtf

 

[jco1385 5,000+ posts]

bad meter? try testing something else...

 

[AudioXtremes 10+ year member]

I am going to suggest user error.

 

[stuckinok 5,000+ posts]

try testing a sub

 

[livinlegend 10+ year member]

i think its a shitty meter

 

[stuckinok 5,000+ posts]

it happens

 

[jaymo]

It may be the user , but I just broke out my meter and put it on brand new Kicker subs. The stated ohm is duel4 ohm. but the meter reads 3 ohms each. ???????????

 

[jco1385 5,000+ posts]

close enough... lol

 

[Immacomputer 10+ year member]

The coil will always read lower than the nominal impedance (what the sub is called; dual 2/4 whatever) on a multimeter because you are reading the Re (which is a speaker parameter). When there is power applied, there is reactance introduced and thus the actual impedance will rise. This will also vary over frequency.

Try searching as there was a thread about just this only a few days ago.