Niles Audio Niles CM5HD - Manual (Page 19)

Installationin
Existing Construction
IMPORTANT: Before you cut into any
wall, review the sections on running
wire and speaker placement.
1. When determining the location of the
speaker cutout keep in mind that the
mounting dogs will extend 3/4" beyond
the cutout. make sure that you do not
place the edge of the cutout directly
next to a ceiling joist. Locate the joists
using a stud sensor or hand-knocking.
2. Once you have determined a possible
position for the cutout, drill a 1/8” pilot
hole just barely through the ceiling
(1/2” to 5/8” deep in most homes)
about an inch below the center of your
proposed speaker location. BE VERY
CAREFUL NOT TO DRILL THROUGH
EXISTING WIRES, PIPES, OR STRUC-
TURE. IF YOU FEEL ANY EXTRA RESIS-
TANCE AS YOU ARE DRILLING, STOP.
3. Cut a foot-long piece of coat hanger.
Bend the wire (creating a right angle)
leaving 4-1/8" at one end for the
CM5HD, 4-3/4" for the CM6HD and
5-3/8" for the CM8HD (this allows for
the extra width of the mounting dogs).
Poke the “L-shaped” wire into the pilot
hole and turn it in a complete circle
and move it into the ceiling cavity to
make sure you have approximately
3-3/4" of depth. If the wires movement
is obstructed by anything, fill the hole(s)
with spackle and try another location.
(See Figure 12)
4. If the coat hanger moves freely in a com-
plete circle, hold the supplied template
up to the ceiling surface. Outline the cir-
cular cutout on the ceiling surface with a
pencil. Drill starting point with a 1/4" bit.
5. If you are cutting drywall use a
sheetrock or keyhole saw. Cut the hole
with the saw at a 45° angle. That way,
the drywall section can be replaced
cleanly if there is an unseen obstruction
behind the wall. BE VERY CAREFUL
NOT TO SAW THROUGH EXISTING
WIRES, PIPES, OR STRUCTURE. IF
YOU FEEL EXTRA RESISTANCE AS
YOU ARE CUTTING, STOP.
6. If you are cutting into a plaster ceiling,
use masking tape to outline your pen-
ciled circle and use a razor to score the
plaster down to the lath beneath. Then
use a chisel to remove all of the plaster
within the taped outline. To actually cut
the lathe, two methods are used profes-
sionally; sawing with a metal cutting
blade on a sabre saw is the quickest
and the riskiest. Sawing a lathe with a
sabre saw can easily vibrate plaster off
the ceiling in a completely distant loca-
tion creating more patchwork. If you
have the patience, use a pair of tin snips
to slowly nip away at the lath instead.
There is little risk with this method, it is
just time consuming.
14
Ins
talla
tion
in Exis
ting Cons
tr
uc
tion
Figure 12