Velodyne HGS-18 "whine"

Thanks for the suggestions. I suspected the servo since I used to have an Entec with a bad servo that did the same thing.Too bad because the Velodyne is a nice unit otherwise.

I used to own the Velodyne HGS-18II and it was dead quiet. Maybe you could upgrade yours to the Series II? I now have a DD-15 and it's very quiet.

I used to own this model and sold it because of the whine you mention. I called Velodyne and was told the servo was the cause. They went on to tell me that there was no cure for the noise, and that maybe I wasn't a Velodyne person. I loved the sub, but couldn't handle the whine, so I sold it and bought a REL Stentor. It's dead quiet.

Call Velodyne and see what they tell you.