9 volt battery to test subwoofer made my other sub move. Why?

[BasedGodson]

I have 2 12s and all of a sudden the right sub has stopped working. So i thought maybe its blown. So i got a 9 volt battery to test and see if it was blown. Well i touched the battery to the terminals and it made the left subwoofer move. (I didn't disconnect any wires when I tested it. All i did was unscrew the sub out of the box and touched the battery to it and it made my other sub move) Why did it do this? Whats wrong with my system?

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[-01limited- 10+ year member]

I would say that your wires are hook up together somehow and the power got to it.

 

[bhsdriller 10+ year member]

so one sub moved and the other didn't?

Either the sub is not working or got disconnected somehow

Edit: connect both subs up like you would wire it to the amp and touch those 2 wires to the battery

 

[-01limited- 10+ year member]

so one sub moved and the other didn't?
Either the sub is not working or got disconnected somehow

Edit: connect both subs up like you would wire it to the amp and touch those 2 wires to the battery

or its blown like he's suspecting.

 

[sacsking916 5,000+ posts]

sounds blown imo