To use the MR-1/MR-CVR as a speaker locator:
Screw or nail the MR-1 onto a stud or rafter where you want the speaker to go.
Attach the speaker wire to the MR-1 with a tie-wrap. (Picture 2)
Cut a rectangular (standard single-gang) hole in the sheetrock when it is installed. (Picture 3)
If the speaker is not going to be installed right away, install the MR-CVR cover plate to make the ceiling look nice in the meantime. (A blank rectangular cover plate would be used in an in-wall location.) (Picture 4)
When ready to install the speaker, bend the MR-1 back into the wall/ceiling. (There is a scored line on the bracket and it is designed to be bent this way.) (Picture 5)
Cut the hole for the speaker. The speaker hole should be cut as far away from the stud as possible, while still including all of the original cutout. This will leave room for the "dog ears" of the speaker to grab hold of the sheetrock. (Picture 6)
Reach through the hole and break the MR-1 bracket, pulling it out through the hole.
Attach the speaker in the normal manner! (Picture 7)