The exposed driver cone is the part to protect on a subwoofer move, even light pressure can dent or tear it and permanently change how it sounds.
Pro tip: Label the speaker wire polarity, positive and negative, before disconnecting, reversed subwoofer wiring is a common post-move mistake that weakens bass output.
Watch out: Never let anything press against the exposed driver cone, even light pressure can dent or tear it and permanently change the sound quality.