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7. Attach the frame to the bracket by
screwing 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 perma-
nent, 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 absolutely flush with the wall
surface. There should be no gaps
between the wall and the frame (See
Figure 12).
Installation of the
Speaker and Grille
in New or Existing
Construction
Setting the Tone Controls
The AT8000 and AT8200 speakers feature
baffle-mounted, 4 position level controls
for the Bass, Midrange and Treble frequen-
cies. These tone shaping filters enable each
of the frequency bands to be cut or boosted
to compensate for less than ideal room
acoustics, or to suit the listener’s preference.
As an example, a speaker installed within
one or two feet of a corner or ceiling may
exhibit excessive bass response caused by
the boundary effect. Cutting the Bass by 3
dB can minimize the boundary effect and
enable the speaker to sound much more
accurate and natural despite it’s proximity
to the adjoining wall or ceiling. (For more
information on the boundary effect, see
The Boundary Effect on page 6.)
In contrast, a large room with lots of
drapes, upholstered furniture and textured
wall paper may sound dead and lifeless.
Boosting the Treble 3dB or more may sub-
stantially increase the ambience and pres-
ence in an absorbent room.
The key to good sound is experimentation.
Set the controls to the “flat” position to start
with, then adjust until the desired results
are achieved.
Installing a Niles MS-1 MicroSensor™
There is a 1/2" round molded "IR Sensor
Knockout" on the face of the speaker baf-
fle. To prevent damage to the crossover
network, 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 necessary. 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.
Installation of the Speaker and Grille in New or Existing Construction
15
Figure 12