how to tell a speaker is blown???

[blackbonnie 5,000+ posts]

i know all of the normal ways to tell...

first read the coils with a dmm

see if your coil is scratching

if you can see the coil, is it intact

any burn marks

but if someone sells you a sub/speaker, they say its blown but the coils read fine, dont scratch, and everything looks sound.

is there anything else i can check without hooking it up to an amp?

(currently do not have an amp available)

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[k_schutte 10+ year member]

I don't think so...

This happened to my Mach5 SPL-15... coils read just fine, no scratching sounds, everythig visible was great! but it was blown, still don't know what was broke but it was

 

[dumple 5,000+ posts]

if the coils still read find then i dont get whats broke about it?

 

[blackbonnie 5,000+ posts]

thats what i was thinking too..