Niles StageFront Pro1770LCR Bedienungsanleitung

Installation Guide

Professional Quality, Compact,

Left/Center/Right Channel Loudspeaker

Pro1770LCR ■Pro2770LCR ■Pro1870LCR ■Pro2870LCR

CONGRATULATIONS!

Thank you for choosing a superior StageFront Home Theater Solutions™ Cabinet LCR

loudspeaker from Niles. With proper installation and operation, you should enjoy

years of trouble-free use.

Niles manufactures the industry’s most complete line of custom installation

components and accessories for audio/video systems. To see the complete Niles

product assortment, visit us on the Internet at: www.nilesaudio.com

TABLE OF CONTENTS

Introduction 1

Features and Benefits 2

Installation Considerations 3

Loudspeaker Placement 4

Finishing the Installation 7

Operation 10

Specifications 11

Limited Warranty 12

Warranty Registration Card 13

INTRODUCTION

The StageFront Home Theater Solutions Loudspeakers are expressly designed

for superior sonic quality in home theater applications. Each model employs

advanced technology components that extract the subtle nuances in recorded

music or the thunderous action sound in a movie. Models ending in “LCR” are

intended primarily for front channel left/center/right placement or wherever a

monopole design is required. Models that end in “FX” are designed for special

effect placement. StageFront models are the perfect choice wherever quality of

sound is the most important consideration.

Pro2870LCR

Stock Number

FG01136

Pro2770LCR

Stock Number

FG01336

Pro1870LCR

Stock Number

FG01135

Pro1770LCR

Stock Number

FG01335

FEATURES AND BENEFITS

INTERLACED CARBON-FIBER WOOFERS WITH BUTYL RUBBER SURROUNDS

Provide increased sound pressure levels and dynamic theater quality sound at

sustained high-power output

FLUID-COOLED TETERON™DOME MIDRANGE*

*Pro1770LCR & Pro2770LCR models only

Produces smooth detailed dialog

FLUID-COOLED CARBON CONE MIDRANGE*

*Pro1870LCR & Pro2870LCR models only

Delivers sustained high output levels and smooth detailed dialog

FLUID-COOLED TETERON™DOME TWEETERS

Deliver ultra-wide dispersion and silky-smooth response

ADJUSTABLE, CAST ALUMINUM, FULLY-ENCLOSED,

DISPERSION-CONTROLLING MIDRANGE/TWEETER POD

Enables precise imaging regardless of placement and accommodates vertical or

horizontal installations

BOUNDARY GAIN COMPENSATION CONTROL*

*Pro1870LCR & Pro2870LCR models only

Allows precise room matching

VARIABLE MIDRANGE AND TREBLE CONTROLS

Enables ﬁne-tuning after installation (+/- 3dB)

CROSS-BRACED CABINETS

Provides the ultimate in rigidity and sound clarity

BI-AMP AND BI-WIRE CAPABILITIES

Optimizes tonal balance and enhances dynamic range

POLISHED BLACK CABINET WITH SCULPTED CHARCOAL ALUMINUM GRILLE

Provides an elegant yet unobtrusive appearance

DOLBY DIGITAL®READY

The StageFront Home Theater Solutions loudspeakers are expressly designed

for superior sonic quality in home theater applications. All models exceed the

speciﬁcations set forth by Dolby Laboratories for the accurate reproduction of Dolby

Digital-Encoded Sources

INSTALLATION CONSIDERATIONS

RECOMMENDED AMPLIFIER POWER

For satisfactory performance, we recommend using a surround ampliﬁer with

a power rating of 20-150 watts for the Pro1770LCR and Pro2770LCR. We

recommend an ampliﬁer power rating of 20-200 watts for the Pro1870LCR and

Pro2870LCR. Most loudspeakers are not damaged by large ampliﬁers, but rather

by small ampliﬁers. If your system is playing at high levels, a small ampliﬁer will run

out of power very quickly and can create damaging “clipping” distortions. A more

powerful ampliﬁer will play at the same volume without distorting. See OPERATION

on page 9for more information about ampliﬁer clipping distortion.

LOUDSPEAKER WIRE

Use 2-conductor loudspeaker wire when connecting loudspeakers to your receiver

or ampliﬁer. For most applications, we recommend using 16-gauge wire. For wiring

runs longer than 80 feet, we recommend 14-gauge wire. Every StageFront Pro

loudspeaker features gold-plated, ﬁve-way binding posts that will accommodate up

to 12-gauge wire directly. Larger sizes can be accommodated via pin connectors.

NOTE: THESE FIVE-WAY BINDING POSTS CAN BE CONNECTED IN SEVERAL DIFFERENT WAYS (E.G.,

BANANA PLUGS, SPADE TERMINALS, AND DIRECT WIRING).

When running wire inside walls or ceilings, use special jacketed cable (CL-2 or CL-3)

to protect the wire and to meet local electrical and ﬁre codes. In some areas, conduit

is also required. For a trouble-free installation, low-voltage wire such as loudspeaker

wire must be run in accordance with the National Electrical Code and any applicable

provisions of the local building code. If you are unsure of the correct installation

techniques, wire jacket, or type of conduit to use, consult a professional audio/video

installer, building contractor, or the local building and inspection department.

TECH TIP

Wire size is expressed by its AWG (American

Wire Gauge) number – the lower the number,

the larger the wire. For example, 12 AWG is

physically larger than 14 AWG.

LOUDSPEAKER PLACEMENT

NOTE: STAGEFRONT LCR LOUDSPEAKERS ARE DESIGNED FOR USE IN FRONT LEFT, CENTER OR

RIGHT-CHANNEL APPLICATIONS. FOR EFFECT CHANNEL APPLICATIONS, WE RECOMMEND USING A

STAGEFRONT FX LOUDSPEAKER.

PLACING THE STAGEFRONT LCR AS THE FRONT LEFT AND RIGHT

LOUDSPEAKERS

In a home theater, the intelligibility of dialog and action reproduced by the front

speakers is paramount! The position of each loudspeaker plays a very important

role in how clear the sound is and how a stereo image is created. Here are some

guidelines to make the process of placement quick and easy:

■Make sure the sound will not be blocked or reflected off furniture or other objects.

The listener should have a direct line of sight with the front of the loudspeaker. To

determine the best position, measure the “listening” distance between the ideal

listening position (e.g., favorite chair or couch) and the wall in which you plan to

install the loudspeakers.

■For stereo music applications, try to place the loudspeakers so that they are equally

distant from the listening spot and at least one half of the listening distance apart to

maintain a large pleasant stereo “image.”

■In home theater applications where there is a center channel, you may choose to

space the left and right main loudspeakers farther apart for a “bigger than life”

sound with Dolby®encoded movies and TV shows. However, for combined music

and movie usage, we recommend using the placement zone for stereo music.

Ideally, if the listening position is 10 feet back from the wall, place the loudspeakers

between 5 and 10 feet apart, as shown in Figure 1.

Figure 1. Recommended

loudspeaker placement for

front left and right channels.

Loudspeaker

Placement Zone

10' 5' 10'

Loudspeaker

Placement Zone

As for placement height, place front left and right loudspeakers on either side of the

picture source so that their tweeters are not more than 24 inches above or below

the center-channel loudspeaker’s tweeter (see Figure 2 on page 6).

NOTE: DO NOT PLACE ANY STAGEFRONT LCR OR FX LOUDSPEAKER TOO CLOSE TO A DIRECT-VIEW

TV MONITOR, AS IT MAY CAUSE PICTURE DISCOLORATION. IN GENERAL, TRY TO KEEP IT AT LEAST 24

INCHES AWAY FROM THE TV. WITH LARGER CRT SCREEN SIZES, TEST THE PLACEMENT DISTANCE FOR

PICTURE DEGRADATION BEFORE INSTALLATION.

THE BOUNDARY EFFECT

Placing a loudspeaker in a cabinet, as is likely for these models, or a corner

can powerfully affect the way a listener perceives bass response. Known as

the boundary effect, placing loudspeakers close to a wall/ceiling boundary, in a

cavity in a cabinet or near a corner wall boundary will emphasize certain bass

frequencies, while canceling others. This effect can make the loudspeaker sound

excessively boomy and inaccurate to some listeners, while to others it just seems

like more bass sound.

As a good rule-of-thumb, if you like listening to your current pair of loudspeakers

with the bass turned up, you’ll enjoy corner placement. However, if you listen

with the tone controls at neutral, try keeping the loudspeakers at least 2 or 3 feet

from the boundaries of the room. If this is not possible, the Pro1870LCR and

Pro2870LCR models feature a Boundary Compensation control to help correct any

issues that this type of placement can cause.

PLACING THE STAGEFRONT LCR AS THE CENTER-CHANNEL LOUDSPEAKER

The center-channel loudspeaker is the workhorse in a home theater system. It

handles all of the critical dialog and is vitally important in creating the illusion of

sounds emanating directly from the picture. Here are some tips for obtaining

optimum center-channel performance:

■In a typical installation, place the loudspeaker horizontally, directly above or below

the television or projection screen. Try to ensure that the loudspeaker is not placed

too high relative to the left and right loudspeaker, as shown in Figure 2.

■The Pro LCR models feature a Midrange/Tweeter pod that can be rotated to

accommodate horizontal installations. If you mount one of these models horizontally,

please remove the screws that hold this pod in place, rotate the pod ninety degrees

so that the tweeter is above the midrange and reinstall the screws to reattach the

pod to the loudspeaker as shown in Figure 3.

(CONTINUED ON NEXT PAGE)

LOUDSPEAKER PLACEMENT (CONTINUED)

■For installations where a perforated projection screen will be used, place the

loudspeaker, either horizontally or vertically, behind the screen at ear level, as

shown in Figure 3.

Pro2870LCR

Pod rotated

(vertical position)

(horizontal position)

Pro2870LCR

Figure 3. Recommended loudspeaker center-channel placement behind a perforated

projection screen.

Figure 2. Placing the Stagefront LCR as the center channel loudspeaker above or below a TV.

Not Greater

than 24"

Not Greater

than 24"

Pro1770LCR

Pro1770LCRPro1770LCR

Pod rotated

(tweeter up)

Pod rotated

(tweeter up)

(Optional Placement Above TV)

FINISHING THE INSTALLATION

CONNECTING THE LOUDSPEAKER

1. The terminals on your loudspeaker support Bi-amp or Bi-wire connections as well

as standard connections. Please choose your preferred method as described below

in Figure 5 on page 8.

2. At each loudspeaker, route the wire to the input

connectors, then separate the loudspeaker wire

so that at least 2 inches of each conductor are

free. Strip away 1/4 inch of insulation from each

loudspeaker wire. Using correct polarity, connect

the appropriate conductor to each five-way

binding post.

NOTE: OBSERVE CORRECT POLARITY: POSITIVE

(+) GOES TO THE RED POST AND NEGATIVE (–)

GOES TO THE BLACK POST. IF YOU ARE UNSURE OF

WIRE POLARITY, SEE THE SECTION, CHECKING

LOUDSPEAKER PHASE BELOW.

3. Connect the other end of the loudspeaker wires to the home theater receiver (or

amplifier) in the same way.

4. Turn on the home theater receiver and calibrate all loudspeakers in the system

according to the receiver manufacturer’s instructions.

BI-WIRE AND BI-AMP CHOICES

Bi-Wiring

In a Bi-Wired conﬁguration, separate cables are connected from the ampliﬁer or

receiver output terminals to the speaker input terminals for the tweeter/midrange

section and the woofers. Be sure to remove the straps linking the two sets of

input terminals on the speaker. Your ampliﬁer and your loudspeakers may be

damaged if you do not remove the straps. This type of conﬁguration results in

lower resistance between the ampliﬁer and speaker than a standard connection

with the same gauge cable. Some listeners may prefer Bi-Wiring to a standard

connection with lower gauge cable.

Bi-Amping

In a Bi-Ampliﬁed system, the tweeter and midrange section are driven by a

separate ampliﬁer than the woofer. Both ampliﬁers are connected to the same

preampliﬁer output. Use the same model ampliﬁer for the tweeter and woofer

inputs and be sure to remove the straps linking the two sets of input terminals

on the speaker. Your ampliﬁers and your loudspeakers may be damaged if you do

not remove the straps.

(CONTINUED ON NEXT PAGE)

Figure 4. Connecting loudspeaker

wires to the terminals.

FINISHING THE INSTALLATION (CONTINUED)

CHECKING LOUDSPEAKER PHASE

Speaker wire has two conductors. On both your loudspeaker and ampliﬁer, one

conductor is attached to the negative (–) terminals, while the other is attached to

the positive (+) terminals. Usually, the wire is marked for your convenience, but the

marking can be done in the following different ways:

■Stripe on one wire

■Ribbed area you can feel on one conductor

■Different colors of metal wire on each conductor

■Fabric strand or string wound into one of the conductors

Of course, there are some wires that appear completely identical. So be careful, or

you might make a connection mistake. If you do, one loudspeaker will be playing

“out-of-phase” with the other loudspeaker. A pair of out-of-phase loudspeakers

Pro2870 LCRPro2870 LCR

Surround Receiver

Straps Removed

Figure 5. Bi-Wire connection

Figure 6. Bi-Amp connection

Pro2870 LCRPro2870 LCR

Straps Removed

Si275 Amp1

Si275 Amp2

Si275 Amp

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