problem with my velodyne HGS-12

my velodyne recently stopped working, there's still power going through but all hear is a faint thump from the speaker has anyone run into this problem ? if so how was it fix
Contact Velodyne. In my experience, they're very helpful.

Dear Morgoth360: I have the same trouble with one of my HGS-15 and the problem was in the subwoofer amplifier.
I can't fix it and made contact with Velodyne and send it the rear/back plate where the amplifier is mounted and they send me a new unit!!

So, like Dbphd posted,: contact Velodyne.

regards and enjoy the music,