I have a pair of the open back ivory 598 s , but one side no longer works . Would it be worth seeing about getting that fixed or should I just hop on this deal ? Is the closed back version that much different ? I do like the color more on the ivory 598 I have though Edit Just checked and my 598 s have a two year warranty , which would mean Monday . How strick are they with the date on that ? Should I grab these as a back up in case I can ' t get mine fixed through Sennheiser ? <| sep |> I run everything in the open , the reason being that it ' s a visual representation of things the player characters would be aware of unconsciously , so why bother ? I ' ve also seen it run with Fog of War , where players can ' t see the world alignment for entities they haven ' t encountered , which is a good balance . On the far end of the spectrum , yes , you can hide everything from the players . I don ' t think I ' ve ever seen this done , but there ' s no reason it wouldn ' t work .