Loud blaring sound from speaker even without audio

[truejulie]

When I turn on my JBL LSR 2300 studio monitor speaker it makes a loud blaring sound that pushes the cone forward. This happens without the audio cord plugged in, it even happens when I change the cord out or use a different outlet. It came on suddenly when I turned it on today. The other speaker is fine. What the What?

 

[americanaudiophile]

My guess would be the amp for the woofer is sending DC into it which makes it move forward. This can damage the woofer so don't keep trying it. Hope it's under warranty.
http://www.jblproservice.com/repairs.htm

 

[truejulie]

My guess would be the amp for the woofer is sending DC into it which makes it move forward. This can damage the woofer so don't keep trying it. Hope it's under warranty.
http://www.jblproservice.com/repairs.htm

thanks, I agree, continuing to try could only kill the speaker cone! I'll take it to my local guy to look at.