view TV monitor as they may cause pic-
ture discoloration the Niles HD•CTR
(video shielded) in-wall may be substitut-
ed for an HD•LRS in such an installation).
In general, try to keep an HD•LRS at least
24 inches away from the TV. With larger
CRT screen sizes, you should test for pic-
ture degradation before installing.
The Boundary Effect
Corners can affect the bass response of the
speaker powerfully! This is called the
boundary effect. You will emphasize partic-
ular bass frequencies and cancel out other
bass frequencies when you place speakers
close to the wall/ceiling boundary or a cor-
ner wall boundary. This can make the
speaker sound excessively boomy and inac-
curate to some listeners, while to others it
just seems like more bass sound. A good
rule of thumb is if you always listen to your
current pair of speakers with the bass turned
up, you’ll enjoy corner placement. If you
keep your tone controls at neutral, try to
keep the speakers at least one or two feet
from the boundaries of the room. The Niles
HD•LRS features a front baffle-mounted
adjustment switch labeled “Bass Cut” which
enables you to compensate for the bound-
ary effect by reducing bass output by 3dB.
Placement of the Center Channel
Speaker (HD•CTR
BX
)
The center channel speaker is the work-
horse in a home theater system. It handles
all of the critical dialog so it’s vitally impor-
tant in creating the illusion of sounds ema-
nating directly from the picture.
The HD•CTR
BX
is specially optimized for
this important job. Its dual magnetically
shielded woofers enable it to be placed
directly adjacent to a direct view televi-
sion without affecting picture quality. In a
typical installation, the HD•CTR
BX
will be
placed horizontally, directly above the
television or projection screen. Try to
insure that the center channel speaker is
not placed too high relative to the left and
right speaker.
(See Figure 3)
.
For installations where a perforated pro-
jection screen will be used, optimum per-
formance can be obtained by placing the
HD•CTR
BX
, either horizontally or vertical-
ly, behind the screen at ear level.
(See
Figure 4)
. When placed at ear level, the
HD•CTR
BX
’s crossover configuration
switch should be set to “DSFG Defeat”.
(See the section on Defeating DSFG on
page 8 for more details).
5
Speak
er Placemen
t
TV
HD•LRS
HD•LRS
HD•CTR
BX
Not Greater
than 24"
Figure 3
For an HD•CTR
BX
placed above a
TV, install the speaker with the
tweeter up. For an HD•CTR
BX
placed below a TV, install the
speaker with the tweeter down.
