When used in landscape rotate the Optimal Audio badge on the grille so that it matches the orientation of the speaker. The badge is spring loaded and very easy to rotate and can only be turned in fixed 90ยบ increments so you will have no problem making sure that it is straight.
The badge is easier to rotate if the grille is first removed (except Cuboid 3, 3TX, 5, 5TX, 6 and 6TX - grille is not removable). With the grille removed push the spigot holding the badge in place so the badge is protruding forward from the grille and is proud of the recess in which it sits. Rotate the badge as required and release the spigot on the rear so it settles back into the recess in the grille.
To adjust the badge on Cuboid 3, 3TX, 5, 5TX, 6 and 6TX simply rotate as required.