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7. Attach the frame to the bracket by screw-
ing the frame to the bracket using the
supplied screws. Do not overtighten the
screws, this will distort the frame and the
grilles will not fit (this is not permanent,
just loosen the screws and the grille will
pop in). The screws should pull the
frame and bracket together (sandwiching
the drywall) so that the frame is absolute-
ly flush with the wall surface. There
should be no gaps between the wall and
the frame (See Figure 17).
Installation of the
Speaker and Grille
in New or Existing
Construction
Installing a Niles MS-1 MicroSensor™
There is a 1/2" round molded "IR Sensor
Knockout" on the face of the speaker baffle.
To prevent damage to the crossover net-
work, you must remove the knockout from
the rear of the speaker. Do not attempt to
remove the knockout with the speaker face
up! Lay the speaker face down on a clean
carpet or rug. Put the tip of a screwdriver
into the center of the round "knockout" and
sharply tap the screwdriver handle as neces-
sary. Install the MS-1 using its mounting hex
nut and washer so that it is tightly secured to
the speaker. Connect all wires and continue
your installation.
Speaker Phase
Speaker wire has two conductors. One
conductor is attached to the negative (-)
terminals and one conductor is attached to
the positive (+) terminals of both your
speaker and your amplifier. Usually, the
wire is marked for your convenience.
There are different ways wires are marked:
a stripe on one wire, a ribbed area of one
conductor you can only feel, different col-
ors of metal wire on each conductor, or
there might be a fabric strand or string
wound into one of the conductors. Of
course, there are some wires which appear
completely identical. Be careful, or you
might make a mistake.
If you make a mistake, one speaker will be
playing “out-of-phase” with the other
speaker. An out-of-phase pair of speakers
work against each other and the sound of
the two speakers playing together will be
lacking in bass and be “phasey” sounding.
If you suspect the sound is not right and
you cannot see any markings on the wire,
try this simple test:
1. Stand half way between the two speakers.
2. Play some music with the amplifier or
radio set to Mono.
3. Listen to the richness of the bass and the
loudness of the sound.
4. Turn off the amplifier and reverse the con-
nections on one amplifier channel only.
5. Repeat the listening test with the same
setting of the volume control. When the
sound has a richer bass and is slightly
louder, the speakers are working together
or “in-phase”.
Installation of the Speaker and Grille in New or Existing Construction
17
Figure 17
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