I cant figure out what is wrong with this sub...

[barber24alldaz 10+ year member]

ok, here is a bit of the background. the sub is a mtx9515-44 on a mtx 1501d. i have a beefy electrical setup. kinetic battery, big 3 upgrade, 320 HO alt, etc. soo i turn my car off one day at the gas station, hear a "thud" i check the trunk, there is smoke billowing out of the port..so i disconnect the power from the battery. i have gutted the system out of the trunk. so my first assumption is the voice coils are fried...but i just tested both today..they are both still testing 3.8 and 3.7 OHMS...SOOO WHAT COULD BE WRONG?!?! lol. i really dont know much about repairing subs. this whole thing is just an excuse for me to build my dream system..18" sundown in a 4.5 cubed box tuned to 35htz..so i just really want to know how to resell this MTX..sell it as broken for parts? or is it a fairly easy fix??

ANY HELP WOULD BE APPRECIATED. THANK YOU

-Jason

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[bubbagumper6 5,000+ posts]

...does the sub still work? Wouldn't that kind of tell you if it's blown or not?

Put a 9v battery on the terminals and see if it pops. That smoke had to come from somewhere...

 

[barber24alldaz 10+ year member]

i havent tested it yet, i have pushed down on the cone and it is smooth. no cracks or resistance. i can still smell the scent of electrical fire if i smell the vents by the voice coils though..

 

[bubbagumper6 5,000+ posts]

Ok well first test it with a 9v battery like I said. The cone should either go out or in depending on the polarity (if you reverse the polarity it will do the opposite). Test both coils. This is a fairly easy test and should only take 5 minutes.

Or better yet, hook it up to a known working amplifier and just TEST IT

 

[barber24alldaz 10+ year member]

ok, i just tested both coils..they both pop. so i dont know what else could be wrong or produce that type of smoke...

 

[Spooney 10+ year member]

hmmmm maybe your amp went boom and started sending dc to your sub. that would get the coils real hot real fast.if the sub survived i personally wouldn't feel right selling it to somebody in 100% functional condition. The sub may last a while or it may last a minute.

 

[barber24alldaz 10+ year member]

i dont think anything is wrong with the amp..it has no funny odors and still turn on fine. i bought it brand new like 5 months ago..idk. and yea, im the same way, i dont want to give any person who buys this a false idea of what they are buying. i would never do that, thus why i am trying to troubleshoot it and find out exactly what is wrong with it b4 i sell it.