Yeah, it's ported. Velodyne VRP1000
The reason I want to know is that I really can't turn this thing up very loud without this happening. I thought it was becuase my previous one was a defective open-box one, but I exchanged it for a brand-new one, and it is the same way.
BTW, this is a tiny room(bedroom). Only about 1000 cu ft. I figured this should be plenty, but now I don't know.