Polk Audio RC55i DIY In-Ceiling and In-Wall Installation Guide - Page 15

Finally install the grill: Terminate the speaker cable to the binding post inserts and install like this: For a professional look we recommend terminating the cables near the receiver or amplifier with a wall plate, this allows a very clean finish, without any gaps or holes in the wall. Your friends will think a professional did the install! The simple install goes like this: Install a single gang retrofit box: These are available at all home centers, cost about $3.00 and are installed just like your speakers: D I Y C I T u t o r i a l 15