Definitive Technology DI 5.5BPS Owner's Manual page 6

• Loosen the rotating lock arms by turning the lock arm screws on
the front of the speaker counter clockwise [figure 12]. Make sure
that the rotating lock arms are flipped inwards [figure 13] so that
your speaker fits into your cutout.
• Place the speaker carefully into the cutout. If you have a level, use it
to help you correctly align rectangular speaker models. Tighten the
lock arm screws with a screwdriver [figure 14]. This will rotate the lock
arms [figure 15] and secure the speaker to the wall/ceiling. Do not
over-tighten the lock arm screws. If you are using a powered screw
driver or drill set the torque to a value of 7 in. - lb. (8dN - m)
• Install the grille on the speaker frame. Powerful magnets hold the
grille in place.
Lock arm
screws.
Turn counter
clockwise
to loosen.
screws.
Turn clock-
wise to
tighten lock
arms and
secure speaker
to surface.
Figure 12
Figure 14
Lock arms
tucked
in prior
to installing
speaker
in wall.
Figure 13
Figure 15