I designed and printed these rings to mount Infinity Reference 6502ix speakers in the rear doors of the Mitsubishi i-Miev.
These also offset the speakers 20mm
...Show more off the door to get closer to the inside door upholstering in a similar fashion to the factory speakers.
You mount the ring to the door using the 3 plates behind it for fixation, the supplied screws with the speakers work fine, otherwise use M4 bolts.