I have been considering many different subwoofers(if you check for other threads by me you already know this) and am now considering Sunfire sub, it seemed to sound better this time i listened to it, last time i think it was set up improperly. I really like the output but am concerned about the "walking" issue. The output was fantastic but it was walking across the floor. I have heard that some people say they got feet and others that say they don't. What's the deal?