Pre-construction brackets are used to designate the location of the loudspeaker will be installed in a wall or ceiling. The brackets define the hole the drywall mechanic will cut out. If you're building a new home, pre-construction brackets will make installing your inwall/in-ceiling speakers easier and more efficient. They are not needed if using a Performance Enclosure.

Bracket Maximum Hole To Hole Distance:
Long Distance: 36.5" (92.7 cm)
Short Distance: 24.5" (62.2 cm)
Short Distance shown in above illustration