Even with a 5-8" driver six inches of total space behind the driver isn't much. I'm going to assume any wall/ceiling mounted speakers are not meant to be your best speakers and represent casual, noncritical listening. Just some insulation around the speaker to keep any backwaves from bouncing back into the drivers. If there is a floor above this room, you still shouldn't require a back box. You might want to place a thin layer of insulation or preferably some polyfill over the speaker to protect it from dust settling into the assembly (beware of fiberglass which will also "leak" bits of itself into the drivers), otherwise the speaker should require nothing more than unrestricted space behind it. Use the speakers as if they were going into an infinite baffle, which, in effect, they are. I have 6" deep studs on the walls and ceilings where I'll be installing these and it's new construction, so I have nearly unlimited flexibility in sizing the boxes.Īre the ceilings open to an attic space or is there another floor above this room? If you are installing into an open attic space, you probably don't require a back box.
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