N801 rubber plug

[tanwn]

Theres a rubber plug at the back of the speaker directly behind the midrange tube. Does it have to be removed for listening or should be covered in place thanks.

[windshear]

Can you provide a picture? I suspect you may be referring to the transport screw. If it is the transport screw, which is a small cap and screw, then it needs to be removed. The transport screw was just used to prevent the voice coil from rubbing when transporting the loudspeaker.