Testing The Space Behind The Hole - Bose Virtually Invisible 191 Bedienungs- Und Installateuranleitung

Steps to Installing
Figure 17
A 22-inch (55.9 cm) length
of sturdy wire bent in two
places
Figure 18
Checking the space for the
depth of the speaker
18

Testing the space behind the hole

You need a tape measure and a sturdy wire (such as a straightened coat hanger)
22 inches (55.9 cm) in length for this step.
1. Bend the wire as shown in Figure 17.
3 inches (7.6 cm)
/
4 1 inches
8
(10.5 cm)
/
4 3 inches
4
(12 cm)
Tip: For greater accuracy, make the first bend a little long, measure again, and cut off the
extra length at that end.
WARNING: If there is any possibility of electrical wiring in the space behind the wallboard,
wrap the wire with electrical tape to prevent electric shock.
2. Make a mark 4 1 / inches (10.5 cm) from the short end as an indicator of the proper front-
8
to-back depth of the hole.
3. Use the bent wire to test for enough depth, front-to-back:
Insert the short end of the wire into the hole and straight back (Figure 18). Probe to make
sure nothing impedes inserting this end to a depth of 4
that the space behind the wallboard is deep enough for the front-to-back speaker
dimension.
• If the wire goes in without a problem, proceed to step 4, below.
• If you cannot insert the wire to the 4
hole elsewhere. Then repeat step 3.
4. Use the wire again to test the width, side-to-side:
With the short end still in the hole, reposition it (as shown in Figure 19) and rotate it 360˚
around the hole. This indicates if the wall space is wide enough on each side of the hole
for the side-to-side dimension of the speaker.
1 /
14 inches
4
(36.2 cm)
1
/ inches (10.5 cm). This indicates
8
1 / -inch (10.5 cm) mark, you need to drill a new pilot
8