It's worth noting that all of the models I tested come with a dust cover, but in every instance bar the "suitcase" I used them with the lid off. While every other aspect of a turntable is damped, the dust cover usually is not. It's a simple piece of plastic designed to keep dust off your vinyl while not playing music. If left on, it can cause feedback when the volume is up loud enough. It's best to remove the cover before playing a record: Players look and sound better that way.