Niles Audio HDLRS, HDCTR Speaker Orientation for Directed Sound Field Geometry, Defeating Dsfg

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 front-mounted Acoustic Fine Tuning controls and crossover mounted configuration switches.

If you desire to make the dialog in a movie		Installing a Niles MS-1 MicroSensor™
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			and sharply tap the screw-
speaker is mounted behind			driver handle as necessary.
a perforated projection			Install the MS-1 using its
TV screen.			mounting hex nut and
			washer so that it is tightly
HD•LRS			secured to the speaker.
Acoustic Fine Tuning	Figure 18		Connect all wires and con-
The front-mounted switches on			tinue your installation.
the HD•CTR also enable the speak-
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
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

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 front-mounted switches on the HD•CTR enable the speaker to be opti- mized regardless of positioning or room acoustics by providing 3dB of Treble Cut and 3dB of Dialog Enhancement. Start by listening to the speaker in the normal mode (switch is in the “out” position). If the sound seems to have too much treble, depress the switch labeled Treble Cut to reduce the amount of high frequencies.

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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