Installation of Brackets, Frames and Grilles in Existing Walls
the drywall section can be replaced clean- ly if there is an unseen obstruction behind the wall. BE VERY CAREFUL NOT TO SAW THROUGH EXISTING WIRES, PIPES, OR STRUCTURE. IF YOU FEEL ANY EXTRA RESISTANCE AS YOU ARE CUT- TING, STOP.
4. If you are cutting into lath and plaster |
walls, use masking tape to outline your |
penciled marks, drill the four corners with |
a 1/4” bit 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. Finally, insert a metal |
cutting blade into a sabre saw and very |
slowly and carefully saw the lath. Sawing |
the lath can easily vibrate plaster off the |
wall. If you have the patience, use a pair |
of tin snips to slowly nip away at the lath |
instead. There is no risk with this method, |
it is just time consuming. |
5. Fill the wall cavity with insulation at |
this point. Remember to use equal |
amounts of insulation for each speaker. |
6. Slip the mounting bracket through the |
hole and pull it toward you so that its front |
edge slides into the hole and stops in place. |
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 |
Installation of the Speaker and Grille in New or Existing Construction
Speaker Orientation for Directed Sound Field Geometry
The Directed Sound Field Geometry (DSFG) provides optimum off axis phase and frequency response due to the acoustic interaction between the woofers and the tweeter. The flattest response will be obtained approximately 15 degrees off axis in the direction opposite the tweeter. Therefore, the orientation of the speaker is important for optimum performance. For an HD•CTR placed above a TV, install the speaker with the tweeter up. For an HD•CTR placed below a TV, install the speaker with the tweeter down. For HD•LRS’s placed in the front, install the speakers with the tweeters facing out.
Setting the Acoustic Fine Tuning and Configuring the Crossover
Both the HD•CTR and HD•LRS models feature
If you desire to make the dialog in a movie | Installing a Niles | |||
more pronounced, depress the switch | There is a 1/2" round molded "IR Sensor | |||
labeled Dialog Enhance. |
| Knockout" on the face of the speaker baf- | ||
|
| fle. To prevent damage to the crossover | ||
Defeating DSFG |
| network you must remove the knockout | ||
The crossover on the back of the HD•CTR | from the rear of the speaker. Do not | |||
enables you to defeat the Directed Sound | attempt to remove the knockout with the | |||
Field Geometry (DSFG) feature. This is | speaker face up. Lay the speaker face | |||
useful when the speaker is mounted at |
| down on a clean carpet or rug. Put the | ||
ear level directly in front of the |
|
| tip of a screwdriver into the cen- | |
primary listening position as |
|
| ter of the round "knockout" | |
would be the case when the |
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| and sharply tap the screw- | |
speaker is mounted behind |
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| driver handle as necessary. | |
a perforated projection |
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| Install the | |
TV screen. |
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| mounting hex nut and | |
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| washer so that it is tightly | |
HD•LRS |
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| secured to the speaker. | |
Acoustic Fine Tuning | Figure 18 | Connect all wires and con- | ||
The |
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| tinue your installation. | |
the HD•CTR also enable the speak- |
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er to be optimized regardless of positioning | Installing the Speaker | |||
or room acoustics. They provide 3dB of | If the grille is already installed, remove it | |||
Treble and Bass Cut respectively. Start by | by using a bent paper clip or the tip of a | |||
listening to the speaker in the normal | corkscrew and pulling it away from the | |||
mode (switch is in the out position). If the | frame (See Figure 18). | |||
sound seems to have too much treble, | 1. Separate the speaker wire so that at least | |||
depress the switch labeled Treble Cut to | ||||
two inches of each conductor are free. | ||||
reduce the amount of high frequencies. If | ||||
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the sound has too much low frequency | 2. Strip one half inch of insulation from the | |||
output (because it is placed near a corner | end of each conductor of the speaker wire. | |||
perhaps) depress the switch labeled Bass | 3. If you have gold pin connectors which | |||
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Cut to reduce the bass by 3dB.
you wish to use, affix them to the stripped
Installation of the Speaker and Grille for New or Existing Construction
the grilles will not fit (this is not perma- |
Main/Surround Configuration
wire ends now.
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 17). |
HD•CTR
Acoustic Fine Tuning
The
The crossover on the back of the HD•LRS enables you to configure the speaker for best performance as either a front “main” speaker or rear “surround” speaker. When the HD•LRS is used as a surround speaker, set the switch to the “Surround” position to provide a diffuse sound field which pro- vides a more convincing illusion of sound all around the listener. When configured as a surround speaker, the orientation of the tweeter is no longer critical.
4.Connect one stripped wire end (or con- nector) to the black and one to the red ter- minal. Pay attention to the markings on the wire. Each speaker must be connected to the amplifier in the same way.
5.Place the speaker baffle in the frame and secure it with the supplied #8 x1/2” screws. If you find that the baffle does not smoothly fit the frame, slightly loosen the mounting screws that hold the frame to the bracket.
6.Carefully fit the grille into its recess so that it is barely in place. Starting with one
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