I've owned several pairs of classic Infinity speakers, incl: Reference 60's and Renaissance 90's. In the case of my Ref 60's, the drivers were placed on the same plane as the front baffle, whilst the grilles had a narrow bevel which met the sculpted corners, top and bottom of the cabinet as you can see in the photos below to reduce diffraction.
In the case of my Ren 90's, the Infinity Designers placed the High Energy Emim and Emit drivers on the same plane as the grille cloth. The drivers even had glue around the outside of the metal face plate of the drivers to help the grill cloth stick to the face plate so there was no gap. The heavy grills also had a piece of MDF which touched the grill cloth, with cut-outs for the drivers which you can see in the last photo, so the music perfectly followed the plane of the grille cloth and sculpted corners of the cabinet. And as you can see, the Ren's grilles had a wider bevel which perfectly aligned with the tripezoidal shaped cabinet, which included wider, more sculpted corners which worked well. The Rens had amazing imaging, sound staging (incl: stage depth) and off-axis response.
