Bose 131 - Manual (Page 9)

AM188201_02_V.pdf October 30, 2001 9
Drill the marked holes using a 1 ⁄
8
inch
(.32 cm) bit. Use a center punch to make
a slight indentation for your drill bit. This
will keep the drill bit from “walking” away
from the mark you have made.
Installing Your Speakers From The Rear Of The Bulkhead
Mark six screw holes. Use the smallest
hole pattern that fits.
You need to open one of the five marked
drain holes because water can enter your
131
TM marine speaker through the ports on
the front of the enclosure.
Holding the enclosure in the mounting
position you chose in Step 7, find the drain
hole that will be at the lowest point when
the speaker is mounted and break through
the surface using a center punch, awl, or
1 ⁄
8
inch (.32 cm) drill bit.
Remove the enclosure from behind the
bulkhead.
A 9
A 10
A 11
A 12
CAUTION: Be sure the enclosure is not in
place behind the bulkhead while drilling.
CAUTION: Acoustic performance is reduced
if the hole is larger than 1 ⁄
8
inch (.32 cm) in
diameter.