How to tell if coils are blown

[EL-ORIGINAL 10+ year member]

How can I tell if one of the coils on my 12" l7 are blown?????????/

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[squeak9798 5,000+ posts]

With a DMM. Set it to resistance (Ohms) and stick the red lead on the DMM to the (+) terminal of the coil, and stick the black lead on the DMM on the (-) terminal of the coil. Or you could check for continuity with the DMM aswell.

 

[Chevyaudio 5,000+ posts]

^ agree get a dmm and set it to ohms and make sure the resistance is correct

 

[jsloan10 10+ year member]

Sniff the vent on the magnet, if it smells strongly of burnt carpet its fried.

 

[cjjackson85 5,000+ posts]

^Not necessarily...

 

[BeanII 10+ year member]

D@MN YOU NOOB!!!!!

HOW DARE YOU ASK A QUESTION LIKE THAT WITHOUT SEARCHING FIRST!!!!!!!

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[cjjackson85 5,000+ posts]

^spelling>>You

 

[BeanII 10+ year member]

^Not necessarily...

Yeah, but it's a pretty good indicator if ya ain't got a DMM

 

[cjjackson85 5,000+ posts]

^Not necessarily....

 

[EL-ORIGINAL 10+ year member]

Cant I just take the l7 out of the box and hook my amp up to each set of coils at a time to see if the cone moves. Can that work it seems logical right??????????? Will the cone move with a blown coil????????

 

[jsloan10 10+ year member]

^Not necessarily....(lol)

 

[BeanII 10+ year member]

c'mon, help the kid out.

An amp can sometimes (often actually) move a speaker that's got a bad coil. Testing the resistance with a DMM is the sure fire way to find out if the speakers good.

spelling? eh.

 

[EL-ORIGINAL 10+ year member]

thx